JP2001267966A - Synchronization acquisition device and synchronization acquisition method - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To estimate a position of a preceding wave and to detect an accurate synchronization time even when a multipath exists or a preceding wave is sharply dropped. SOLUTION: Means 100 averages the correlation value of the received signal by moving average, means 101 detects the maximum value of the averaged signal, means 102 normalizes the averaged signal by the maximum value, and means 103 to 103 At 110, the normalized signal is multiplied by a predetermined magnification while being shifted at regular intervals, and the multiplied value is multiplied by the correlation ideal value corresponding to the waveform of only the preceding wave without noise.
The squared error is calculated, the squared error is normalized by multiplying the normalized signal by the magnification at the minimum, and the threshold determining unit 111 determines whether or not the normalized signal exceeds a predetermined threshold.
The first time determined to be exceeded is determined time storage means 11
3 is stored. If a default value such as a processing delay is added to the determination time, the position of the preceding wave can be estimated and the synchronization time can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile telephone device in a mobile communication system, a mobile station device such as an information terminal device having a mobile phone function and a computer function, or a base station device performing wireless communication with the mobile station device. Synchronous acquisition device and synchronous acquisition that can estimate the position of the preceding wave by using the correlation method and detect the synchronization time even when there is a multipath or when the preceding wave is sharply dropped. About the method.

[0002]

2. Description of the Related Art Conventionally, as this kind of synchronization acquisition device and synchronization acquisition method, there is one described in Japanese Patent Application Laid-Open No. Hei 8-316678.

FIG. 24 is a block diagram showing a configuration of a conventional synchronization acquisition device.

The synchronization acquisition device shown in FIG. 24 includes a multiplier 2400, a band pass filter (BPF) 2401, an integrator 2402, a decision unit 2403, and a spreading code generator 2
404 and a timing control device 2405.

The operation of such a configuration will be described. Multiplier 2400 multiplies the spread code output from spread code generator 2404 by the input signal, and BPF 2401 allows only a predetermined band of the multiplication result signal to pass therethrough.
Output to 402.

[0006] Integrator 2402 integrates the filtered signal for a predetermined time. Since a sharp peak value appears at the synchronization point in the integration result, the decision unit 2403 sets the integrator 240
It is determined whether the output signal of No. 2 is the peak value of the synchronization point by comparing it with a predetermined value.

[0007] The timing control device 2405 supplies a clock signal to the spread code generator 2404 to control the spread code and the input signal so that the timing does not shift.

[0008]

However, in the conventional apparatus, when a multipath exists or when the preceding wave is sharply falling, the synchronization time is obtained by the peak value and the synchronization position is obtained by the delay wave. Since the estimation is performed, the position of the preceding wave cannot be estimated, and there is a problem that the synchronization position is shifted.

Further, even when the synchronization position is not estimated by the delay wave, the time when the predetermined threshold is exceeded for the first time is used as the synchronization time at the time of the threshold value determination. There is a problem that it is later than the original time.

[0010] The present invention has been made in view of such a point, and even when a multipath is present or when a preceding wave is sharply dropped, the position of the preceding wave can be estimated and an accurate synchronization time can be obtained. It is an object of the present invention to provide a synchronization acquisition device and a synchronization acquisition method capable of detecting a synchronization.

[0011]

According to the present invention, there is provided a synchronization acquisition apparatus comprising: a moving average means for averaging a correlation value of a received signal by a moving average; and a maximum average value for detecting a maximum value of the averaged signal. Detecting means, average value normalizing means for normalizing the averaged signal by the maximum value, signal moving means for moving the normalized signal while delaying,
Magnification changing means for changing a magnification by which the moved signal is multiplied; magnification multiplying means for multiplying the magnification by the moved signal; and a correlation ideal value and a magnification multiplication corresponding to a waveform of only a preceding wave without noise. 2 with the signal after multiplication by the means
A square error calculating means for calculating a square error, a minimum error detecting means for detecting a minimum value from the square error, a magnification storing means for storing a minimum magnification of the square error, Magnification multiplying normalization means for normalizing by multiplying the minimum magnification by the normalized signal, and threshold determination means for determining whether the signal normalized by this means has exceeded a predetermined threshold. , A determination time storage means for storing the first time determined to be over.

According to this configuration, even when a multipath exists or when the preceding wave drops sharply, the position of the preceding wave can be estimated and the accurate synchronization time can be detected. Further, the synchronization time can be detected by the moving averaging means without being influenced by instantaneous fluctuations.

[0013] The synchronization acquisition apparatus of the present invention employs, in the above configuration, an averaging means for averaging the correlation values of the received signals by averaging instead of the moving averaging means.

According to this configuration, even when there is a multipath or when the preceding wave is sharply dropped, the position of the preceding wave can be estimated and the accurate synchronization time can be detected. In addition, the synchronization time corresponding to the instantaneous fluctuation can be detected by the averaging means.

In the above structure, the synchronization acquisition apparatus of the present invention has a maximum correlation value detecting means for detecting a maximum correlation value of a received signal, and a correlation value normalizing means for normalizing the received signal based on the maximum value. And inputting the normalized received signal to the moving averaging means.

According to this configuration, after the received signal is normalized with the best correlation value, the position of the preceding wave is estimated and the synchronization time is detected by the same processing as in the above configuration. The wave position can be estimated, and an accurate synchronization time can be detected. Further, the synchronization time can be detected by the moving averaging means without being influenced by instantaneous fluctuations.

The synchronization acquisition apparatus according to the present invention comprises: a maximum correlation value detecting means for detecting a maximum value of a correlation value of a received signal; a correlation value normalizing means for normalizing the received signal based on the maximum value; Moving average means for averaging a correlation value of the averaged received signal by a moving average, signal moving means for moving the averaged signal while delaying, and a magnification for changing a magnification by which the moved signal is multiplied Changing means, a magnification multiplying means for multiplying the moved signal by the magnification, and a square error between a correlation ideal value corresponding to a waveform of only a preceding wave without noise and a signal multiplied by the magnification multiplying means. A square error calculating means for calculating, a minimum error detecting means for detecting a minimum value from the square error, a magnification storing means for storing a magnification at the minimum of the square error, Magnification and the averaged And the magnification multiplying normalizing means for normalizing multiplies the signal, normalized signal and a threshold determination means for determining whether more than a predetermined threshold value by this means,
A determination time storage means for storing the first time determined to be exceeded.

According to this configuration, since the maximum average value detecting means and the average value normalizing means are omitted from the above components, the amount of calculation can be reduced accordingly.

In the above structure, the synchronization acquisition apparatus of the present invention has a maximum correlation value detecting means for detecting a maximum correlation value of a received signal, and a correlation value normalizing means for normalizing the received signal based on the maximum value. And inputting the normalized received signal to the averaging means.

According to this configuration, after the received signal is normalized with the best correlation value, the preceding wave position is estimated by the same processing as in the above configuration, and the synchronization time is detected. The wave position can be estimated, and an accurate synchronization time can be detected. In addition, the synchronization time corresponding to the instantaneous fluctuation can be detected by the averaging means.

In the above structure, the synchronization acquisition device of the present invention comprises: a reception level detecting means for detecting a power of a reception signal;
Receiving level normalizing means for normalizing the received signal using the power, and inputting the normalized received signal to a moving average means.

According to this configuration, after the received signal is normalized with the received power that can specify the received signal, the position of the preceding wave is estimated by the same processing as in the above configuration, and the synchronization time is detected. The position of the preceding wave can be well estimated, and the accurate synchronization time can be detected. Further, the synchronization time can be detected by the moving averaging means without being affected by instantaneous fluctuations.

According to the present invention, there is provided a synchronization acquisition apparatus comprising: a reception level detection unit for detecting a power of a reception signal; a reception level normalization unit for normalizing the reception signal based on the power; Moving average means for averaging the correlation value by moving average, signal moving means for moving the averaged signal while delaying, magnification changing means for changing a magnification by which the moved signal is multiplied, and the magnification Magnification multiplying means for multiplying the signal and the shifted signal, and a square error calculation for calculating a square error between an ideal correlation value corresponding to a waveform of only a preceding wave having no noise and a signal multiplied by the magnification multiplying means. Means, a minimum error detection means for detecting a minimum value from the square error, a magnification storage means for storing a magnification at the minimum of the square error, and a magnification at the minimum of the square error. Signal Multiplication normalization means for multiplying and normalizing, a threshold determination means for determining whether or not a signal normalized by this means has exceeded a predetermined threshold, and a first time at which the signal has been determined to be exceeded is stored. And a determination time storage unit for performing the determination.

According to this configuration, since the maximum average value detection means and the average value normalization means are omitted from the above components, the amount of calculation can be reduced accordingly.

[0025] In the above structure, the synchronization acquisition device of the present invention comprises a reception level detecting means for detecting the power of a received signal;
Receiving level normalizing means for normalizing the received signal with the power, and inputting the normalized received signal to an averaging means.

According to this configuration, after the received signal is normalized with the reception power that can specify the received signal, the position of the preceding wave is estimated by the same processing as in the above-described configuration, and the synchronization time is detected. The position of the preceding wave can be well estimated, and the accurate synchronization time can be detected. In addition, the synchronization time corresponding to the instantaneous fluctuation can be detected by the averaging means.

The synchronization acquisition apparatus of the present invention employs, in the above-mentioned configuration, an addition averaging means for averaging the normalized correlation value of the received signal by averaging, instead of the moving averaging means.

According to this configuration, since the maximum average value detecting means and the average value normalizing means are omitted from the above components, the amount of calculation can be reduced accordingly.

[0029] In the synchronization acquisition device of the present invention, in the above configuration, after a predetermined frame time of the received signal elapses, the magnification change amount of the magnification change means is changed based on the magnification stored in the magnification storage means. Means is provided.

According to this configuration, it is possible to prevent a large change in magnification at the time of fitting and a sudden shift in synchronization time.

The mobile station apparatus of the present invention employs a configuration provided with a synchronization acquisition device having the same configuration as any of the above.

According to this configuration, in the mobile station device,
The same operation and effect as any of the above can be obtained.

The base station apparatus of the present invention employs a configuration including a synchronization acquisition apparatus having the same configuration as any of the above.

According to this configuration, in the base station apparatus,
The same operation and effect as any of the above can be obtained.

According to the synchronization acquisition method of the present invention, the correlation value of the received signal is averaged by a moving average, the maximum value of the averaged signal is detected, and the averaged signal is normalized by the maximum value. Multiplying by a variable magnification while delay-moving the digitized signal, and calculating a square error between the multiplied value and a correlation ideal value corresponding to only a waveform of the preceding wave without noise, and calculating the square error. The normalization signal is multiplied by the normalization signal to normalize, and the first time when the normalized signal exceeds a predetermined threshold is stored, and the preceding wave position is estimated by adding the processing delay to the storage time. And get the synchronization time.

According to this method, the position of the preceding wave can be estimated and the accurate synchronization time can be detected even when there is a multipath or when the preceding wave drops sharply. Further, the synchronization time can be detected by the moving averaging means without being influenced by instantaneous fluctuations.

According to the synchronization acquisition method of the present invention, in the above method, instead of averaging the correlation values of the received signals by the moving average, the correlation values are averaged by the addition average.

According to this method, the position of the preceding wave can be estimated and the accurate synchronization time can be detected even when there is a multipath or when the preceding wave drops sharply. In addition, the synchronization time corresponding to the instantaneous fluctuation can be detected by the averaging means.

According to the synchronization acquisition method of the present invention, in the above method, the maximum value of the correlation value of the received signal is detected, the received signal is normalized based on the maximum value, and the normalized received signal is subjected to a moving average. Averaged.

According to this method, after the received signal is normalized with the best correlation value, the position of the preceding wave is estimated by the same processing as in the above configuration, and the synchronization time is detected. The wave position can be estimated, and an accurate synchronization time can be detected. Further, the synchronization time can be detected by the moving averaging means without being influenced by instantaneous fluctuations.

According to the synchronization acquisition method of the present invention, the maximum value of the correlation value of the received signal is detected, the received signal is normalized based on the maximum value, and the normalized received signal is averaged by a moving average. This averaged signal is multiplied by a variable magnification while being delayed, and a square error between the multiplied value and a correlation ideal value corresponding to a waveform of only the preceding wave without noise is calculated. Is normalized by multiplying the averaged signal by the minimum magnification, storing the first time when the normalized signal exceeds a predetermined threshold, and adding the processing delay to the stored time to calculate the position of the preceding wave. And the synchronization time is obtained.

According to this method, the maximum average value detection and the average value normalization processing are omitted as compared with the above method, so that the amount of calculation can be reduced accordingly.

According to the synchronization acquisition method of the present invention, in the above method, the maximum value of the correlation value of the received signal is detected, the received signal is normalized based on the maximum value, and the normalized received signal is averaged. Averaged.

According to this method, after the received signal is normalized with the best correlation value, the position of the preceding wave is estimated by the same processing as that described above, and the synchronization time is detected. The wave position can be estimated, and an accurate synchronization time can be detected. In addition, the synchronization time corresponding to the instantaneous fluctuation can be detected by the averaging means.

According to the synchronization acquisition method of the present invention, in the above method, the power of the received signal is detected, the received signal is normalized with the detected power, and the normalized received signal is averaged by a moving average. I made it.

According to this method, after the received signal is normalized with the received power that can specify the received signal, the position of the preceding wave is estimated by the same processing as in the above configuration, and the synchronization time is detected. The position of the preceding wave can be well estimated, and the accurate synchronization time can be detected. Further, the synchronization time can be detected by the moving averaging means without being influenced by instantaneous fluctuations.

According to the synchronization acquisition method of the present invention, the power of a received signal is detected, the received signal is normalized with the detected power, and the normalized received signal is averaged by a moving average.
This averaged signal is multiplied by a variable magnification while being delayed, and a square error between the multiplied value and a correlation ideal value corresponding to a waveform of only the preceding wave without noise is calculated. Is normalized by multiplying the averaged signal by the minimum magnification, storing the first time when the normalized signal exceeds a predetermined threshold, and adding the processing delay to the stored time to calculate the position of the preceding wave. And the synchronization time is obtained.

According to this method, the maximum average value detection and the average value normalization processing are omitted as compared with the above method, so that the amount of calculation can be reduced accordingly.

According to the synchronization acquisition method of the present invention, in the above-mentioned method, the power of the received signal is detected, the received signal is normalized using the detected power, and the normalized received signal is averaged by averaging. I made it.

According to this method, after the received signal is normalized with the received power that can specify the received signal, the position of the preceding wave is estimated by the same processing as in the above configuration, and the synchronization time is detected. The position of the preceding wave can be well estimated, and the accurate synchronization time can be detected. In addition, the synchronization time corresponding to the instantaneous fluctuation can be detected by the averaging means.

According to the synchronization acquisition method of the present invention, in the above method, instead of averaging the normalized correlation values of the received signals with the moving average, the correlation values are averaged with the addition average.

According to this method, the maximum average value detection and the average value normalization processing are omitted as compared with the above method, so that the amount of calculation can be reduced accordingly.

[0053] The synchronization acquisition method according to the present invention, in the above method, after the predetermined frame time elapses in the received signal, changes the change amount of the variable magnification based on the magnification when the square error already obtained is the minimum. I tried to make it.

According to this method, it is possible to prevent a large change in magnification at the time of fitting and a sudden shift in synchronization time.

[0055]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 1 of the present invention.

The synchronization acquisition apparatus shown in FIG. 1 includes a moving average unit 100, a maximum average value detecting unit 101, an average value normalizing unit 102, a signal moving unit 103, a magnification changing unit 104, and a magnification multiplying unit. 105 and square error calculating means 1
06, a minimum error detecting means 107, a correlation ideal value calling means 108, a magnification storing means 109, a magnification multiplying normalizing means 110, a threshold judging means 111, and a threshold calling means 11
2 and a determination time storage unit 113.

The moving averaging means 100 calculates a moving average of a correlation value (hereinafter referred to as a correlation value of a received signal) between a signal in the same channel of a received signal of a plurality of channels and a synchronization word for synchronizing the transmitting and receiving sides. It is something to average.

The moving average is obtained by multiplying the correlation value for each frame of the received signal by the weighted average value and the average value up to the previous frame, and calculating the sum to perform averaging on a frame basis. Is the way.

The maximum average value detecting means 101 detects the maximum value of the averaged signal. The average value normalizing means 102 normalizes the signal averaged with the detected maximum value.

The signal moving means 103 moves the signal when fitting the normalized signal with the ideal correlation value. The correlation ideal value and the fitting will be described later.

The magnification changing means 104 changes the magnification for multiplying the moved signal. The magnification multiplying means 105 multiplies the moved signal by a magnification. The correlation ideal value calling means 108 calls a correlation ideal value. The square error calculator 106 calculates a square error between the called correlation ideal value and the signal obtained by the multiplication.

The minimum error detecting means 107 detects the minimum value of the square error. Magnification storage means 109
Stores a magnification multiplied by the detected minimum error.

The magnification multiplying and normalizing means 110 normalizes by multiplying the magnification stored in the magnification storing means 109 by the signal before being moved by the signal moving means 103.

The threshold value calling means 112 calls a threshold value. The threshold value judging means 111 judges whether the signal normalized by the magnification multiplying and normalizing means 110 exceeds the called threshold value. Determination time storage means 11
3 stores the first time when it is determined that the threshold value has been exceeded.

Here, a process called fitting will be described with reference to FIGS.

A waveform 2100 shown in FIG. 21 is a waveform having only a main wave (preceding wave) and no noise, and the rising section indicated by AB is used as the correlation ideal value.

A waveform 2200 shown in FIG. 22 is a waveform to be synchronized, and performs all processes between the moving averaging means 100 and the average value normalizing means 102 for all channels and all frames. However, if the approximate synchronization position is known in advance, the window 2 set to a section with a certain width before and after that
The processing need only be performed on the data 201.

In this process, the waveform 2200 is multiplied by a magnification that can detect the preceding wave 2100 and is fitted to the correlation value while shifting the waveform 2200 by a certain interval, and calculates a square error with the correlation ideal value 2100. Then, the waveform 2200 is multiplied by the magnification when the error is minimum. By this fitting processing, a waveform 2300 shown in FIG.
Can be detected.

Further, by adding a default value such as a processing delay to the detection time, the position of the preceding wave can be estimated and the synchronization time can be obtained.

FIG. 2 shows a block diagram of another synchronization acquisition device. The synchronization acquisition device shown in FIG. 2 processes the received signal when a certain frame time elapses in the sequentially input reception signal. In addition to the configuration of the synchronization acquisition device shown in FIG. Magnification change value changing means 20
0.

The magnification change value changing means 200 changes the magnification change amount of the magnification changing means 104 based on the magnification previously stored in the magnification storage means 109 after a certain frame time has elapsed.

Next, the operation of the synchronization acquisition apparatus shown in FIGS. 1 and 2 will be described.

First, in the moving averaging means 100, the correlation value of the received signal is averaged, and the maximum value of the averaged signal is detected by the maximum average value detecting means 101.

Next, the average value normalizing means 102 normalizes the averaged signal by the maximum value. Then, in order to perform the fitting, the average value normalizing means 10
While the signal normalized by 2 is shifted by a very short time by the signal moving unit 103, the magnification in a certain range obtained by the magnification changing unit 104 is multiplied by the magnification multiplying unit 105.

The square error between the multiplied signal and the correlation ideal value called by the correlation ideal value calling means 108 is calculated by the square error calculating means 106. Thereafter, the minimum error detection means 107 detects the minimum error from the square errors, and the multiplication magnification at the time when the minimum error is calculated is stored in the magnification storage means 109.

Next, in the magnification multiplying and normalizing means 110,
The magnification stored in the magnification storage means 109 is multiplied by the signal normalized by the average value normalization means 102. The threshold determination unit 111 determines whether or not the signal after the multiplication exceeds the threshold value called by the threshold value calling unit 112.

The first time exceeding the threshold value by this determination is stored in the determination time storage means 113. The synchronization time is obtained by adding a default value to the stored time. In other words, the stored time is a time for estimating the preceding wave position and detecting the synchronization time.

On the other hand, when a certain frame time has elapsed in the received signal, the magnification change value changing means 200 causes the magnification change amount of the magnification changing means 104 to change in a minute section before and after the magnification stored in the magnification storage means 109. Set to change.

As described above, according to the synchronization acquisition apparatus of the first embodiment, normalization is performed after averaging the correlation value of the received signal by the moving average, and the normalized signal is added to the normalized signal based on the ideal correlation value. A fitting process is performed to determine whether or not the signal when the signal most matches the correlation ideal value has exceeded the threshold value. The position of the preceding wave is estimated from the first time at which the signal has exceeded the ideal value, and the synchronization time is detected.

As a result, even when a multipath exists or when the preceding wave drops sharply, the position of the preceding wave can be estimated and the accurate synchronization time can be detected.

Further, when a certain frame time has elapsed in the received signal, the magnification change amount for multiplying the moved signal is changed in a minute section before and after the already stored magnification. As a result, it is possible to prevent the magnification from greatly changing at the time of fitting, and prevent the synchronization time from being suddenly shifted.

(Embodiment 2) FIG. 3 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 2 of the present invention. However, in the second embodiment shown in FIG. 3, parts corresponding to those in the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.

The difference between the synchronization acquisition device of the second embodiment shown in FIG.
Instead of the averaging means 300.

The averaging means 300 calculates the sum of the correlation values of all the frames of the received signal, and divides the sum by the number of channels, thereby averaging the correlation value of each frame of the received signal. . This method is called averaging.

FIG. 4 shows a block diagram of another synchronization acquisition device. The synchronization acquisition device shown in FIG. 4 includes a magnification change value changing means 200 in addition to the configuration of FIG.

In the synchronization acquisition apparatus shown in FIGS. 3 and 4 having such a configuration, the averaging means 300 first performs averaging processing by averaging the correlation values of the received signals. Thereafter, processing is performed in the units 101 to 113 and 200 in the same manner as described in the first embodiment.

As described above, according to the synchronization acquisition apparatus of the second embodiment, the correlation value of the received signal is averaged by averaging, and then normalization is performed. The normalized signal is added to the normalized signal based on the ideal correlation value. A fitting process is performed to determine whether or not the signal when the signal most matches the correlation ideal value has exceeded the threshold value. The position of the preceding wave is estimated from the first time at which the signal has exceeded the ideal value, and the synchronization time is detected.

As a result, even when a multipath exists or when the preceding wave drops sharply, the position of the preceding wave can be estimated and the accurate synchronization time can be detected.

Further, when a certain frame time has elapsed in the received signal, the magnification change amount for multiplying the moved signal is changed in a minute section before and after the already stored magnification. As a result, it is possible to prevent the magnification from greatly changing at the time of fitting, and prevent the synchronization time from being suddenly shifted.

(Embodiment 3) FIG. 5 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 3 of the present invention. However, in the third embodiment shown in FIG. 5, portions corresponding to the respective portions of the first embodiment in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The difference between the synchronization acquisition device of the third embodiment shown in FIG.
Is provided with the maximum correlation value detection means 500 and the correlation value normalization means 501 at the preceding stage of the above.

The maximum correlation value detecting means 500 detects the maximum correlation value of the received signal.

The correlation value normalizing means 501 normalizes the received signal based on the maximum value.

FIG. 6 is a block diagram of another synchronization acquisition device. The synchronization acquisition device shown in FIG. 6 includes a magnification change value changing means 200 in addition to the configuration of FIG.

In the synchronization acquisition apparatus shown in FIGS. 5 and 6 having such a configuration, first, the maximum correlation value detecting means 500 is used.
Then, the maximum value of the correlation value of the received signal is detected, and the correlation value normalizing means 501 normalizes the received signal based on the maximum value. Thereafter, processing is performed in the means 100 to 113 and 200 in the same manner as described in the first embodiment.

As described above, according to the synchronization acquisition apparatus of the third embodiment, the maximum value of the correlation value of the received signal is detected before the correlation value of the received signal is averaged by the moving average, and the maximum value of the correlation value of the received signal is detected. The received signal is normalized.

Thus, after the received signal is normalized with the best correlation value, the position of the preceding wave is estimated by the same processing as in the first embodiment, and the synchronization time is detected. The position can be estimated, and an accurate synchronization time can be detected.

Further, when a certain frame time has elapsed in the received signal, the magnification change amount for multiplying the moved signal is changed in a minute section before and after the already stored magnification. As a result, it is possible to prevent the magnification from greatly changing at the time of fitting, and prevent the synchronization time from being suddenly shifted.

(Embodiment 4) FIG. 7 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 4 of the present invention. However, in the fourth embodiment shown in FIG. 7, portions corresponding to the respective portions of the third embodiment in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.

The synchronization acquisition apparatus of the fourth embodiment shown in FIG. 7 is different from that of the third embodiment in that the maximum average value detection means 101 and the average value normalization means 102 are omitted from the components of FIG. That is, the conversion means 100 and the signal moving means 103 are connected.

The maximum value of the received signal is detected by the maximum correlation value detection means 500 and the correlation value normalization means 501.
Since the received signal is normalized with this maximum value, even if the maximum value detection and normalization processing by the maximum average value detection means 101 and the average value normalization means 102 are omitted, the estimation of the position of the preceding wave and the synchronization time Is possible.

FIG. 8 shows a block diagram of another synchronization acquisition device. The synchronization acquisition device shown in FIG. 8 includes a magnification change value changing unit 200 in addition to the configuration of FIG.

In the synchronization acquisition apparatus shown in FIGS. 7 and 8 having such a configuration, first, the maximum correlation value detecting means 500 is used.
Then, the maximum value of the correlation value of the received signal is detected, and the correlation value normalizing means 501 normalizes the received signal based on the maximum value.

Next, the moving averaging means 100 performs averaging processing of the normalized correlation value of the received signal, and the averaged signal is shifted by the signal moving means 103 by a very short time to change the magnification. The magnification in a certain range obtained by the means 104 is multiplied by the magnification multiplying means 105.

The square error between the signal after the multiplication and the correlation ideal value called by the correlation ideal value calling means 108 is calculated by the square error calculating means 106. Thereafter, the minimum error detection means 107 detects the minimum error from the square errors, and the multiplication magnification at the time when the minimum error is calculated is stored in the magnification storage means 109.

Next, in the magnification multiplying and normalizing means 110,
The magnification stored in the magnification storage means 109 is multiplied by the signal averaged by the moving averaging means 100. The threshold determination unit 111 determines whether or not the signal after the multiplication exceeds the threshold value called by the threshold value calling unit 112.

The first time exceeding the threshold value by this determination is stored in the determination time storage means 113. The synchronization time is obtained by adding a default value to the stored time. In other words, the stored time is a time for estimating the preceding wave position and detecting the synchronization time.

On the other hand, if a certain frame time has elapsed in the received signal, the magnification change value of the magnification change means 104 is changed by the magnification change value changing means 200 in a minute section before and after the magnification stored in the magnification storage means 109. Set to change.

As described above, according to the synchronization acquisition apparatus of the fourth embodiment, the maximum average value detection means 101 and the average value normalization means 102 are omitted from the components of the third embodiment.
Accordingly, the amount of calculation can be reduced as compared with the third embodiment.

(Embodiment 5) FIG. 9 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 5 of the present invention. However, in the fifth embodiment shown in FIG. 9, parts corresponding to the respective parts of the second embodiment in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

The synchronization acquisition apparatus of the fifth embodiment shown in FIG. 9 is different from that of the second embodiment in that the averaging means 300
Is provided with the maximum correlation value detection means 500 and the correlation value normalization means 501 at the preceding stage of the above.

FIG. 10 is a block diagram of another synchronization acquisition device. The synchronization acquisition apparatus shown in FIG. 10 includes a magnification change value changing unit 200 in addition to the configuration of FIG.

In the synchronization acquisition apparatus shown in FIGS. 9 and 10 having such a configuration, first, the maximum correlation value detecting means 50 is used.
At 0, the maximum value of the correlation value of the received signal is detected, and the correlation value normalizing means 501 normalizes the received signal based on the maximum value. Thereafter, processing is performed in the means 300 to 113 and 200 in the same manner as described in the second embodiment.

As described above, according to the synchronization acquisition apparatus of the fifth embodiment, before averaging the correlation value of the received signal by averaging, the maximum value of the correlation value of the received signal is detected, and the maximum value of the correlation value is detected. The received signal is normalized.

Thus, after the received signal is normalized with the best correlation value, the position of the preceding wave is estimated by the same processing as in the first embodiment, and the synchronization time is detected. The position can be estimated, and an accurate synchronization time can be detected.

Further, when a certain frame time has elapsed in the received signal, the magnification change amount for multiplying the moved signal is changed in a minute section before and after the already stored magnification. As a result, it is possible to prevent the magnification from greatly changing at the time of fitting, and prevent the synchronization time from being suddenly shifted.

(Embodiment 6) FIG.11 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 6 of the present invention. However, in the sixth embodiment shown in FIG. 11, portions corresponding to the respective portions of the fifth embodiment in FIG. 9 are denoted by the same reference numerals, and description thereof will be omitted.

The synchronization acquisition apparatus of the sixth embodiment shown in FIG. 11 differs from that of the fifth embodiment in that the maximum average value detection means 101 and the average value normalization means 102 are omitted from the components of FIG. That is, the connecting means 300 and the signal moving means 103 are connected.

The maximum correlation value detection means 500 and the correlation value normalization means 501 detect the maximum value of the received signal.
Since the received signal is normalized with this maximum value, even if the maximum value detection and normalization processing by the maximum average value detection means 101 and the average value normalization means 102 are omitted, the estimation of the position of the preceding wave and the synchronization time Is possible.

FIG. 12 is a block diagram of another synchronization acquisition device. The synchronization acquisition device shown in FIG.
And a magnification change value changing means 200.

In the synchronization acquisition apparatus shown in FIGS. 11 and 12 having such a configuration, first, the maximum correlation value detecting means 5 is used.
At 00, the maximum value of the correlation value of the received signal is detected, and the correlation value normalizing means 501 normalizes the received signal using the maximum value.

Next, in the averaging means 300, the normalized correlation value of the received signal is averaged, and the averaged signal is shifted by the signal moving means 103 by a very small amount of time to change the magnification. The magnification in a certain range obtained by the means 104 is multiplied by the magnification multiplying means 105.

The square error between the multiplied signal and the correlation ideal value called by the correlation ideal value calling means 108 is calculated by the square error calculating means 106. Thereafter, the minimum error detection means 107 detects the minimum error from the square errors, and the multiplication magnification at the time when the minimum error is calculated is stored in the magnification storage means 109.

Next, in the magnification multiplying and normalizing means 110,
The magnification stored in the magnification storage means 109 is multiplied by the signal averaged by the averaging means 300. The threshold determination unit 111 determines whether or not the signal after the multiplication exceeds the threshold value called by the threshold value calling unit 112.

The first time exceeding the threshold value by this determination is stored in the determination time storage means 113. A value obtained by adding a default value to the stored time is a synchronization time. In other words, the stored time is a time for estimating the preceding wave position and detecting the synchronization time.

On the other hand, if a certain frame time has elapsed in the received signal, the magnification change value changing means 200 causes the magnification change amount of the magnification changing means 104 to change in a minute section before and after the magnification stored in the magnification storage means 109. Set to change.

As described above, according to the synchronization acquisition apparatus of the sixth embodiment, the maximum average value detection means 101 and the average value normalization means 102 are omitted from the components of the fifth embodiment.
Accordingly, the amount of calculation can be reduced as compared with the fifth embodiment.

(Embodiment 7) FIG.13 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 7 of the present invention. However, in the seventh embodiment shown in FIG. 13, parts corresponding to the respective parts of the first embodiment in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The difference between the synchronization acquisition apparatus of the seventh embodiment shown in FIG. 13 and the first embodiment is that the moving averaging means 100
Is provided with a reception level detection means 1300 and a reception level normalization means 1301 at the preceding stage.

The receiving level detecting means 1300 detects the level of the received signal.

The reception level normalizing means 1301 normalizes the received signal based on the detected reception level.

FIG. 14 is a block diagram of another synchronization acquisition device. The synchronization acquisition device shown in FIG.
And a magnification change value changing means 200.

In the synchronization acquisition apparatus shown in FIGS. 13 and 14 having such a configuration, first, the reception level detecting means 1 is used.
At 300, the level of the received signal is detected, and a received level normalizing means 1301 normalizes the received signal based on the detected received level. Hereinafter, means 100 to 11
In 3 and 200, processing is performed in the same manner as described in the first embodiment.

As described above, according to the synchronization acquisition apparatus of the seventh embodiment, the level of the received signal is detected before the correlation value of the received signal is averaged by the moving average, and the level of the received signal is detected based on the detected received level. Signal normalization was performed.

As a result, after the received signal is normalized at a reception level at which the received signal can be specified, the position of the preceding wave is estimated by the same processing as in the first embodiment, and the synchronization time is detected. , The position of the preceding wave can be estimated, and the accurate synchronization time can be detected.

Further, when a certain frame time has elapsed in the received signal, the magnification change amount for multiplying the moved signal is changed in a minute section before and after the already stored magnification. As a result, it is possible to prevent the magnification from greatly changing at the time of fitting, and prevent the synchronization time from being suddenly shifted.

(Eighth Embodiment) FIG. 15 is a block diagram showing a configuration of a synchronization acquisition apparatus according to an eighth embodiment of the present invention. However, in the eighth embodiment shown in FIG. 15, portions corresponding to those of the seventh embodiment in FIG. 13 are denoted by the same reference numerals, and description thereof will be omitted.

The synchronization acquisition apparatus of the eighth embodiment shown in FIG. 15 differs from that of the seventh embodiment in that the maximum average value detecting means 101 and the average value normalizing means 102 are different from the components shown in FIG.
Is omitted, and the moving averaging means 100 and the signal moving means 103 are connected.

This is because the reception level is detected by the reception level detection means 1300 and the reception level normalization means 1301 and the received signal is normalized at this reception level, so that the maximum average value detection means 101 and the average value Normalization means 1
This is because the estimation of the position of the preceding wave and the detection of the synchronization time are possible even if the maximum value detection and the normalization processing in 02 are omitted.

FIG. 16 is a block diagram of another synchronization acquisition device. The synchronization acquisition device shown in FIG.
And a magnification change value changing means 200.

In the synchronization acquisition apparatus shown in FIGS. 15 and 16 having such a configuration, first, the reception level detecting means 1 is used.
At 300, the level of the received signal is detected, and a received level normalizing means 1301 normalizes the received signal based on the detected received level.

Next, in the moving averaging means 100, an averaging process of the normalized correlation value of the received signal is performed. The magnification in a certain range obtained by the means 104 is multiplied by the magnification multiplying means 105.

The square error between the multiplied signal and the correlation ideal value called by the correlation ideal value calling means 108 is calculated by the square error calculating means 106. Thereafter, the minimum error detection means 107 detects the minimum error from the square errors, and the multiplication magnification at the time when the minimum error is calculated is stored in the magnification storage means 109.

Next, in the magnification multiplying and normalizing means 110,
The magnification stored in the magnification storage means 109 is multiplied by the signal averaged by the moving averaging means 100. The threshold determination unit 111 determines whether or not the signal after the multiplication exceeds the threshold value called by the threshold value calling unit 112.

The first time exceeding the threshold value by this determination is stored in the determination time storage means 113. A value obtained by adding a default value to the stored time is a synchronization time. In other words, the stored time is a time for estimating the preceding wave position and detecting the synchronization time.

On the other hand, when a certain frame time has elapsed in the received signal, the magnification change value changing means 200 causes the magnification change amount of the magnification changing means 104 to change in a minute section before and after the magnification stored in the magnification storage means 109. Set to change.

As described above, according to the synchronization acquisition apparatus of the eighth embodiment, the maximum average value detection means 101 and the average value normalization means 102 are omitted from the components of the seventh embodiment.
Accordingly, the amount of calculation can be reduced as compared with the seventh embodiment.

(Embodiment 9) FIG.17 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 9 of the present invention. However, in the ninth embodiment shown in FIG. 17, portions corresponding to the respective portions of the second embodiment in FIG. 3 are denoted by the same reference numerals, and description thereof will be omitted.

The synchronization acquisition apparatus of the ninth embodiment shown in FIG. 17 is different from that of the second embodiment in that the averaging means 300
Is provided with a reception level detection means 1300 and a reception level normalization means 1301 at the preceding stage.

FIG. 18 is a block diagram of another synchronization acquisition device. The synchronization acquisition device shown in FIG.
And a magnification change value changing means 200.

In the synchronization acquisition device shown in FIGS. 17 and 18 having such a configuration, first, the reception level detecting means 1 is used.
At 300, the level of the received signal is detected, and a received level normalizing means 1301 normalizes the received signal based on the detected received level. Hereinafter, means 300 to 11
In 3 and 200, processing is performed in the same manner as described in the second embodiment.

As described above, according to the synchronization acquisition apparatus of the ninth embodiment, the level of the received signal is detected before the correlation value of the received signal is averaged by averaging, and the received signal level is detected based on the detected received level. Signal normalization was performed.

As a result, after the received signal is normalized at a reception level at which the received signal can be specified, the position of the preceding wave is estimated by the same processing as in the second embodiment, and the synchronization time is detected. , The position of the preceding wave can be estimated, and the accurate synchronization time can be detected.

Further, when a certain frame time has elapsed in the received signal, the amount of magnification change for multiplying the moved signal is changed in a minute section before and after the already stored magnification. As a result, it is possible to prevent the magnification from greatly changing at the time of fitting, and prevent the synchronization time from being suddenly shifted.

(Embodiment 10) FIG.19 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 10 of the present invention. However, in the tenth embodiment shown in FIG. 19, portions corresponding to the respective portions of the ninth embodiment in FIG. 17 are denoted by the same reference numerals, and description thereof will be omitted.

The synchronization acquisition apparatus of the tenth embodiment shown in FIG. 19 is different from the ninth embodiment in that the maximum average value detecting means 101 and the average value normalizing means 10
2, the averaging means 300 and the signal moving means 103
And that they are connected.

This is because the reception level is detected by the reception level detection means 1300 and the reception level normalization means 1301 and the received signal is normalized at this reception level, so that the maximum average value detection means 101 and the average value Normalization means 1
This is because the estimation of the position of the preceding wave and the detection of the synchronization time are possible even if the maximum value detection and the normalization processing in 02 are omitted.

FIG. 20 is a block diagram of another synchronization acquisition device. The synchronization acquisition device shown in FIG.
And a magnification change value changing means 200.

In the synchronization acquisition apparatus shown in FIGS. 19 and 20 having such a configuration, first, the reception level detecting means 1 is used.
At 300, the level of the received signal is detected, and a received level normalizing means 1301 normalizes the received signal based on the detected received level.

Next, in the averaging means 300, the normalized correlation value of the received signal is averaged, and the averaged signal is shifted by the signal moving means 103 by a very short time to change the magnification. The magnification in a certain range obtained by the means 104 is multiplied by the magnification multiplying means 105.

The square error between the multiplied signal and the correlation ideal value called by the correlation ideal value calling means 108 is calculated by the square error calculating means 106. Thereafter, the minimum error detection means 107 detects the minimum error from the square errors, and the multiplication magnification at the time when the minimum error is calculated is stored in the magnification storage means 109.

Next, in the magnification multiplying and normalizing means 110,
The magnification stored in the magnification storage means 109 is multiplied by the signal averaged by the averaging means 300. The threshold determination unit 111 determines whether or not the signal after the multiplication exceeds the threshold value called by the threshold value calling unit 112.

The first time exceeding the threshold value by this determination is stored in the determination time storage means 113. A value obtained by adding a default value to the stored time is a synchronization time. In other words, the stored time is a time for estimating the preceding wave position and detecting the synchronization time.

On the other hand, when a certain frame time has elapsed in the received signal, the magnification change value changing means 200 determines that the magnification change amount of the magnification changing means 104 is in a minute section before and after the magnification stored in the magnification storage means 109. Set to change.

As described above, according to the synchronization acquisition apparatus of the tenth embodiment, since the maximum average value detection means 101 and the average value normalization means 102 are omitted from the components of the ninth embodiment, the implementation is correspondingly reduced. The calculation amount can be reduced as compared with the ninth embodiment.

[0167]

As described above, according to the present invention,
Even when there is a multipath or when the preceding wave drops rapidly, the position of the preceding wave can be estimated and the accurate synchronization time can be detected.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a synchronization acquisition device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing another configuration of the synchronization acquisition device according to the first embodiment;

FIG. 3 is a block diagram illustrating a configuration of a synchronization acquisition device according to a second embodiment of the present invention.

FIG. 4 is a block diagram showing another configuration of the synchronization acquisition device according to the second embodiment;

FIG. 5 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 3 of the present invention.

FIG. 6 is a block diagram showing another configuration of the synchronization acquisition device according to the third embodiment.

FIG. 7 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 4 of the present invention.

FIG. 8 is a block diagram showing another configuration of the synchronization acquisition apparatus according to the fourth embodiment.

FIG. 9 is a block diagram showing a configuration of a synchronization acquisition device according to a fifth embodiment of the present invention.

FIG. 10 is a block diagram showing another configuration of the synchronization acquisition apparatus according to the fifth embodiment.

FIG. 11 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 6 of the present invention.

FIG. 12 is a block diagram showing another configuration of the synchronization acquisition apparatus according to the sixth embodiment.

FIG. 13 is a block diagram showing a configuration of a synchronization acquisition device according to a seventh embodiment of the present invention.

FIG. 14 is a block diagram showing another configuration of the synchronization acquisition apparatus according to the seventh embodiment.

FIG. 15 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 8 of the present invention.

FIG. 16 is a block diagram showing another configuration of the synchronization acquisition apparatus according to the eighth embodiment.

FIG. 17 is a block diagram showing a configuration of a synchronization acquisition device according to Embodiment 9 of the present invention.

FIG. 18 is a block diagram showing another configuration of the synchronization acquisition apparatus according to the ninth embodiment.

FIG. 19 is a block diagram showing a configuration of a synchronization acquisition apparatus according to Embodiment 10 of the present invention.

FIG. 20 is a block diagram showing another configuration of the synchronization acquisition apparatus according to the tenth embodiment.

FIG. 21 is a waveform diagram of an ideal correlation value used for fitting of the synchronization acquisition apparatuses according to the first to tenth embodiments.

FIG. 22 is a waveform diagram of an ideal correlation value of received data in the synchronization acquisition apparatus according to the first to tenth embodiments.

FIG. 23 is a waveform chart after a correlation ideal value of received data is fitted in the synchronization acquisition apparatus according to the first to tenth embodiments.

FIG. 24 is a block diagram showing another configuration of a conventional synchronization acquisition device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 moving averaging means 101 maximum average value detecting means 102 normalizing means using the maximum average value 103 signal moving means 104 magnification changing means 105 magnification multiplying means 106 square error calculating means 107 minimum error detecting means 108 correlation ideal value calling means 109 magnification storage means 110 magnification multiplication normalization means 111 threshold value judgment means 112 threshold value calling means 113 judgment time storage means 200 magnification change value change means 300 averaging means 500 maximum correlation value detection means 501 correlation value normalization means 1300 reception level detection Means 1301 Received level normalization means 2100 Correlation ideal value 2200 Example of received data correlation value 2201 Window 2300 Example of received data after fitting

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Kitahara 2-1-1, Hikosancho, Kanazawa City, Ishikawa Prefecture Inside Matsushita Communication Kanazawa Research Laboratories Co., Ltd. No.3-1, Matsushita Communication Industrial Co., Ltd. F-term (reference) 5K022 EE01 EE21 EE31 5K047 AA01 CC01 HH02 HH15 HH21 HH52 LL06 MM03 MM12

Claims (22)

[Claims] 1. A moving average means for averaging a correlation value of a received signal by a moving average, a maximum average value detecting means for detecting a maximum value of the averaged signal, and Average value normalizing means for normalizing the output signal,
Signal moving means for moving the normalized signal while delaying it; magnification changing means for changing a magnification by which the moved signal is multiplied; magnification multiplying means for multiplying the magnification by the moved signal; noise A square error calculating means for calculating a square error between a correlation ideal value corresponding to a waveform of only the preceding wave having no waveform and a signal multiplied by the magnification multiplying means, and a minimum error for detecting a minimum value from the square error Detection means; magnification storage means for storing a magnification at the minimum of the square error;
Magnification multiplying and normalizing means for multiplying and normalizing the magnification at the time of the minimum of the square error and the normalized signal, and determining whether or not the signal normalized by the means has exceeded a predetermined threshold value And a determination time storage means for storing the first time determined to have exceeded the threshold value. 2. The synchronization acquisition apparatus according to claim 1, further comprising an averaging means for averaging the correlation values of the received signals by averaging, instead of the moving averaging means. 3. The apparatus according to claim 1, further comprising: a maximum correlation value detecting unit for detecting a maximum value of the correlation value of the received signal; and a correlation value normalizing unit for normalizing the received signal based on the maximum value. 2. The synchronization acquisition device according to claim 1, wherein the received signal is input to a moving averaging unit. 4. A maximum correlation value detecting means for detecting a maximum value of a correlation value of a received signal; a correlation value normalizing means for normalizing the received signal based on the maximum value; Moving average means for averaging the correlation value by moving average, signal moving means for moving the averaged signal while delaying, magnification changing means for changing a magnification by which the moved signal is multiplied, and the magnification Magnification multiplying means for multiplying the signal and the shifted signal, and a square error calculation for calculating a square error between an ideal correlation value corresponding to a waveform of only a preceding wave having no noise and a signal multiplied by the magnification multiplying means. Means,
Minimum error detection means for detecting a minimum value from the square error, magnification storage means for storing a minimum magnification of the square error, and a minimum magnification of the square error and the averaged signal. Multiplication normalization means for multiplying and normalizing, a threshold determination means for determining whether or not a signal normalized by this means has exceeded a predetermined threshold, and a first time at which the signal has been determined to be exceeded is stored. And a determination time storage unit. 5. A maximum correlation value detection unit for detecting a maximum value of a correlation value of a reception signal, and a correlation value normalization unit for normalizing the reception signal based on the maximum value, wherein the normalized 3. The synchronization acquisition device according to claim 2, wherein the received signal is input to an averaging means. 6. A receiving level detecting means for detecting a power of a received signal, and a receiving level normalizing means for normalizing the received signal with the power, and a moving average of the normalized received signal. 2. The synchronization acquisition device according to claim 1, wherein the synchronization acquisition device inputs the information. 7. A receiving level detecting means for detecting the power of a received signal, a receiving level normalizing means for normalizing the received signal with the power, and a moving average of a correlation value of the normalized received signal. Moving averaging means for averaging, signal moving means for moving the averaged signal while delaying, magnification changing means for changing a magnification by which the moved signal is multiplied, and the magnification and the moved signal A multiplication factor; a square error calculation unit that calculates a square error between an ideal correlation value corresponding to a waveform of only a preceding wave having no noise and a signal multiplied by the magnification multiplication unit; A minimum error detecting means for detecting a minimum value from an error;
Magnification storage means for storing the magnification at the time of the minimum of the squared error; magnification multiplication normalization means for multiplying the averaged signal by the magnification at the minimum of the squared error to normalize; A synchronization determination device, comprising: threshold determination means for determining whether the converted signal exceeds a predetermined threshold; and determination time storage means for storing the first time determined to have exceeded the threshold. . 8. A receiving level detecting means for detecting a power of a received signal, and a receiving level normalizing means for normalizing the received signal by the power, and averaging the normalized received signal. 3. The synchronization acquisition device according to claim 2, wherein the input is input to a means. 9. The synchronization according to claim 4, further comprising an averaging means for averaging the normalized correlation value of the received signal by averaging, instead of the moving averaging means. Capture device. 10. A magnification change amount changing means for changing a magnification change amount of the magnification change means based on a magnification stored in a magnification storage means after a predetermined frame time in a received signal has elapsed. Claim 1 to Claim 9
The synchronization acquisition device according to any one of the above. 11. A mobile station device comprising the synchronization acquisition device according to any one of claims 1 to 10. 12. A base station device comprising the synchronization acquisition device according to claim 1. Description: 13. A correlation value of a received signal is averaged by a moving average, a maximum value of the averaged signal is detected, the averaged signal is normalized by the maximum value, and the normalized signal is delayed and shifted. While multiplying by a variable magnification, calculating a square error between the multiplied value and a correlation ideal value corresponding to only a waveform of the preceding wave without noise, and calculating the magnification when the square error is minimum, The normalized time is multiplied and normalized, and the first time when the normalized signal exceeds a predetermined threshold value is stored, and the preceding wave position is estimated by adding the processing delay to the stored time, and the synchronization time is obtained. A synchronization acquisition method characterized by the above-mentioned. 14. The synchronization acquisition method according to claim 13, wherein, instead of averaging the correlation values of the received signals by the moving average, the correlation values are averaged by an addition average. 15. A method for detecting a maximum value of a correlation value of a received signal,
14. The synchronization acquisition method according to claim 13, wherein the received signal is normalized by the maximum value, and the normalized received signal is averaged by a moving average. 16. Detecting a maximum value of a correlation value of a received signal,
The received signal is normalized by the maximum value, the normalized received signal is averaged by a moving average, and the averaged signal is delayed and shifted, multiplied by a variable magnification,
A square error between the multiplied value and a correlation ideal value corresponding to a waveform of only the preceding wave having no noise is calculated, and the squared error is normalized by multiplying the averaged signal by a magnification at a minimum. A synchronization acquisition method comprising: storing a first time when a normalized signal exceeds a predetermined threshold; estimating a preceding wave position by adding a processing delay to the storage time; and obtaining a synchronization time. 17. A method for detecting a maximum value of a correlation value of a received signal,
15. The method according to claim 14, wherein the received signal is normalized by the maximum value, and the normalized received signal is averaged by averaging. 18. The synchronization according to claim 13, wherein the power of the received signal is detected, the received signal is normalized by the power, and the normalized received signal is averaged by a moving average. Capture method. 19. The power of a received signal is detected, the received signal is normalized by the power, the normalized received signal is averaged by a moving average, and the averaged signal is variable-moved while being delayed and moved. Is multiplied, and a square error between the multiplied value and a correlation ideal value corresponding to the waveform of only the preceding wave having no noise is calculated. The magnification when the square error is minimum is calculated as the averaged signal. Multiplying and normalizing, storing the first time when this normalized signal exceeds a predetermined threshold, estimating the position of the preceding wave by adding a processing delay to the stored time, and obtaining the synchronization time. Synchronous acquisition method. 20. The synchronization according to claim 14, wherein the power of the received signal is detected, the received signal is normalized with the detected power, and the normalized received signal is averaged by averaging. Capture method. 21. The synchronization acquisition method according to claim 16, wherein, instead of averaging the normalized correlation value of the received signal with a moving average, the correlation value is averaged with an addition average. 22. The method according to claim 13, wherein after a predetermined frame time elapses in the received signal, the amount of change in the variable magnification is changed on the basis of the magnification when the square error already obtained is the minimum. 22. The synchronization acquisition method according to claim 21.