CN115085749B - A kind of transmission distortion processing method of communication signal and related components - Google Patents

Abstract

The invention discloses a transmission distortion processing method and related components of a communication signal, and relates to the field of wireless communication. The predetermined time domain pilot frequency data is pre-stored, the unknown time domain communication data and the agreed time domain pilot frequency data are acquired, and the above two The operator performs Fourier transform with the same number of points to determine the unknown frequency domain communication data and the agreed frequency domain pilot data, and then uses the preset frequency domain notch strategy corresponding to the transmission distortion to process the appointed frequency domain pilot data, determine The first undistorted data, and then based on the first undistorted data and the agreed time domain pilot data, it is determined to perform processing corresponding to the transmission distortion on the unknown frequency domain communication data to obtain the second undistorted data, which realizes the use of the agreed time domain. The pilot frequency data guides the unknown time-domain communication data to perform de-distortion processing corresponding to the transmission distortion. On this basis, the reconstructed time-domain communication data can be obtained, which reduces the bit error rate of the communication system transmission and ensures the integrity of the entire communication system. transmission performance.

Description

Communication signal transmission distortion processing method and related components

technical field

The invention relates to the technical field of wireless communication, in particular to a transmission distortion processing method of communication signals and related components.

Background technique

With the continuous advancement of wireless communication technology, people have higher requirements for communication speed and communication reliability. Inter-symbol interference and multipath propagation in the process of data transmission have brought challenges to the reliability of communication systems. Currently commonly used communication signal transmission methods include OFDM (Orthogonal frequency division multiplex, Orthogonal Frequency Division Multiplexing) and SCFDE (Single carrier frequency domain equalization, single carrier frequency domain equalization). The transmission rate is to deal with inter-symbol interference and multipath propagation, and then transmit data through a set of parallel narrowband channels. However, OFDM has very high requirements on the signal transmitter to cope with the large peak-to-average ratio in the transmission process, which brings such problems as power loss, poor anti-amplifier nonlinear ability, mutual interference between multiple carriers, and amplitude superposition, etc. Various unavoidable problems, so SCFDE came into being. After modulating the communication signal, it also performs linear processing, thereby reducing the peak-to-average ratio, power consumption and carrier synchronization index requirements of the signal, and improving the efficiency of the amplifier. , not only well deal with the problem of inter-symbol interference and multipath propagation, but also make up for the defects of OFDM, which is a solution that can replace OFDM.

However, in actual communication, the communication signal sent by the signal transmitter is prone to transmission distortion problems such as interference and deep fading during the wireless communication propagation process, which will damage the communication signal, but the existing SCFDE cannot resist the above problems, which in turn affects the The transmission performance of the entire communication system cannot meet the normal bit error rate requirements of the communication system.

Therefore, how to find an effective way to deal with the problem of transmission distortion in the process of wireless communication propagation is an urgent problem to be solved.

Contents of the invention

The purpose of the present invention is to provide a transmission distortion processing method of communication signals and related components, which realizes the de-distortion processing corresponding to the transmission distortion, and can obtain reconstructed time-domain communication data on this basis, reducing the transmission cost of the communication system. The bit error rate ensures the transmission performance of the entire communication system.

In order to solve the above technical problems, the present invention provides a transmission distortion processing method for communication signals, including:

Obtain the unknown time domain communication data and agreed time domain pilot data sent by the signal transmitter;

performing Fourier transforms with the same number of points on the unknown time-domain communication data and the agreed time-domain pilot data respectively, so as to determine the unknown frequency-domain communication data and the agreed-upon frequency-domain pilot data in one-to-one correspondence;

processing the agreed frequency domain pilot data by using a preset frequency domain notch strategy corresponding to the transmission distortion to determine first dedistortion data;

Based on the first dedistortion data and the pre-stored agreed time domain pilot data, determine to perform processing corresponding to the transmission distortion on the unknown frequency domain communication data, so as to obtain second dedistortion data;

Determining reconstructed time-domain communication data corresponding to the unknown time-domain communication data based on the second de-distorted data.

Preferably, based on the first de-distortion data and the pre-stored agreed time-domain pilot data, it is determined to perform processing corresponding to the transmission distortion on the unknown frequency-domain communication data, so as to obtain second de-distortion data ,include:

performing the Fourier transform on the pre-stored agreed time-domain pilot data to determine an abnormal frequency-domain pilot spectrum;

determining, based on the first de-distorted data, the non-abnormal frequency-domain pilot spectrum, and a preset channel estimation strategy, a frequency point position where the transmission distortion occurs in the non-abnormal frequency-domain pilot spectrum;

Based on the frequency point position and a preset frequency domain equalization policy, it is determined to perform processing corresponding to the transmission distortion on the unknown frequency domain communication data, so as to obtain second dedistorted data.

Preferably, the agreed time-domain pilot data is a CAZAC sequence including M sub-data, where M is the number of points.

Preferably, the transmission distortion includes distortion caused by interference;

Using a preset frequency-domain notch strategy corresponding to the transmission distortion to process the agreed-upon frequency-domain pilot data to determine first de-distorted data, including:

S21: Determine an interference distortion detection threshold based on the agreed frequency domain pilot data, where the agreed frequency domain pilot data includes M spectral lines in total, and M is the number of points;

S22: let k=1;

S23: Determine whether the kth interference parameter determined based on the first preset relational expression is not less than 0, if yes, go to S24; if not, go to S25;

Wherein, the first preset relational expression is:

为第k个干扰参数，

为所述干扰畸变检测门限值，

为所述约定频域导频数据中第k根谱线的幅度；

is the kth disturbance parameter,

is the detection threshold value of the interference distortion,

is the amplitude of the kth spectral line in the agreed frequency domain pilot data;

更新为0；S24: The magnitude corresponding to the kth interference parameter

update to 0;

S25: let k=k+1;

S26: Determine whether the k is not greater than M; if so, return to S23; if not, enter S27;

均小于0；若是，进入S28；若否，进入S29；S27: Determine whether all

Both are less than 0; if yes, go to S28; if not, go to S29;

S28: Determine that the currently processed agreed frequency domain pilot data is the first dedistortion data, and end the loop;

S29: Determine a new interference distortion detection threshold based on the amplitudes corresponding to the updated M spectral lines, and return to S22.

Preferably, determining the interference distortion detection threshold based on the agreed frequency domain pilot data includes:

determining the first parameter based on the second preset relational expression;

The second preset relational expression is:

为所述第一参数；in,

is the first parameter;

determining an interference distortion detection threshold based on a third preset relational expression and the first parameter;

The third preset relational expression is:

为所述干扰畸变检测门限值。in,

A threshold value is detected for the interference distortion.

Preferably, the transmission distortion includes deep fading distortion;

Using a preset frequency-domain notch strategy corresponding to the transmission distortion to process the agreed-upon frequency-domain pilot data to determine first de-distorted data, including:

S31: Determine a deep fading distortion detection threshold based on the agreed frequency domain pilot data, where the agreed frequency domain pilot data includes M spectral lines in total, and M is the number of points;

S32: Let j=1;

S33: Judging whether the jth depth fading parameter determined based on the fourth preset relational expression is not greater than 0, if yes, proceed to S34; if not, proceed to S35;

Wherein, the fourth preset relational expression is:

为所述第j个深度衰落参数，

为所述深度衰落畸变检测门限值，

为所述约定频域导频数据中第j根谱线的幅度；in,

is the jth depth fading parameter,

is the depth fading distortion detection threshold value,

is the amplitude of the jth spectral line in the agreed frequency domain pilot data;

更新为0；S34: The amplitude corresponding to the jth depth fading parameter

update to 0;

S35: set j=j+1;

S36: Determine whether the j is not greater than M; if so, return to S33; if not, enter S37;

均大于0；若是，进入S38；若否，进入S39；S37: Determine whether all

are greater than 0; if so, enter S38; if not, enter S39;

S38: Determine that the currently processed agreed frequency domain pilot data is the first dedistortion data, and end the loop;

S39: Determine a new deep fading distortion detection threshold based on the updated amplitudes corresponding to the M spectral lines, and return to S32.

Preferably, determining the deep fading distortion detection threshold based on the agreed frequency domain pilot data includes:

determining the second parameter based on the fifth preset relational expression;

Wherein, the fifth preset relational expression is:

为所述第二参数；in,

is the second parameter;

determining the depth fading distortion detection threshold based on the sixth preset relational expression;

The sixth preset relational expression is:

为所述深度衰落畸变检测门限值。in,

A threshold value is detected for the deep fading distortion.

In order to solve the above technical problems, the present invention also provides a communication signal transmission distortion processing system, including:

The acquisition unit is used to acquire the unknown time domain communication data and the agreed time domain pilot data sent by the signal transmitter;

The time-frequency transformation unit is used to perform Fourier transform with the same number of points on the unknown time domain communication data and the agreed time domain pilot data respectively, so as to determine the unknown frequency domain communication data and the agreed frequency domain pilot in one-to-one correspondence data;

A first processing unit, configured to process the agreed frequency-domain pilot data by using a preset frequency-domain notch strategy corresponding to the transmission distortion, so as to determine first de-distorted data;

The second processing unit is configured to determine to perform processing corresponding to the transmission distortion on the unknown frequency domain communication data based on the first dedistortion data and the pre-stored agreed time domain pilot data, so as to obtain a second 2. Dedistort the data;

A data reproducing unit, configured to determine reconstructed time-domain communication data corresponding to the unknown time-domain communication data based on the second de-distorted data.

In order to solve the above technical problems, the present invention also provides a communication signal transmission distortion processing device, including:

memory for storing computer programs;

The processor is configured to execute the steps of the method for processing the transmission distortion of the communication signal as described above.

In order to solve the above technical problems, the present invention also provides a computer-readable storage medium, including:

A computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method for processing transmission distortion of a communication signal as described above are implemented.

This application provides a communication signal transmission distortion processing method and related components, which pre-stores the agreed time-domain pilot data, obtains the unknown time-domain communication data and the agreed time-domain pilot data sent by the signal transmitter, and respectively analyzes the above-mentioned The two perform Fourier transform with the same number of points to determine the corresponding unknown frequency domain communication data and the agreed frequency domain pilot data, and then use the preset frequency domain notch strategy corresponding to the transmission distortion to carry out the agreed frequency domain pilot data. The processing may determine the first de-distorted data, and then based on the first de-distorted data and the agreed time-domain pilot data, determine to perform processing corresponding to the transmission distortion on the unknown frequency-domain communication data, so as to obtain the second de-distorted data, It realizes the de-distortion processing corresponding to the transmission distortion on the unknown time domain communication data guided by the agreed time domain pilot data, on this basis, the reconstructed time domain communication data can be obtained, which reduces the bit error rate of the communication system transmission, The transmission performance of the entire communication system is guaranteed.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the prior art and the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are only some of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

Fig. 1 is a flow chart of a transmission distortion processing method of a communication signal provided by the present invention;

Fig. 2 is the display diagram of a kind of direct sequence spread spectrum signal frequency spectrum that includes narrowband interference signal provided by the present invention;

FIG. 3 is a schematic display diagram of a direct sequence spread spectrum signal spectrum including deep fading frequency points provided by the present invention;

FIG. 4 is a schematic structural diagram of a communication signal transmission distortion processing system provided by the present invention;

FIG. 5 is a schematic structural diagram of a communication signal transmission distortion processing device provided by the present invention.

Detailed ways

The core of the present invention is to provide a communication signal transmission distortion processing method and related components, which realizes the de-distortion processing corresponding to the transmission distortion, on this basis, the reconstructed time-domain communication data can be obtained, and the transmission cost of the communication system is reduced. The bit error rate ensures the transmission performance of the entire communication system.

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIG. 1 . FIG. 1 is a flowchart of a method for processing transmission distortion of a communication signal provided by the present invention.

In this embodiment, considering that the transmission mode of wireless communication signals in the prior art mainly relies on OFDM technology and SCDFE technology, but in actual communication, the communication signal sent by the signal transmitter is prone to interference and interference during the wireless communication propagation process. Transmission distortion problems such as deep fading cannot meet the normal bit error rate requirements of the communication system. In order to solve the above technical problems, the present invention provides a transmission distortion processing method of communication signals, which ensures the transmission performance of the entire communication system.

The transmission distortion processing method of the communication signal includes:

S11: Obtain unknown time domain communication data and agreed time domain pilot data sent by the signal transmitter;

Specifically, the method is applied to the signal receiver, and the agreed time-domain pilot data is the pilot data agreed in advance by the signal transmitter and the signal receiver, and both parties know the original data form of the pilot data, which is used for Guide the subsequent dewarping process.

It can be understood that the unknown time-domain communication data and the agreed-time-domain pilot data here are all pre-processed data for data transmission in order to meet the transmission requirements of wireless communication technology. For example, the unknown original communication data sent by the signal transmitter in the SCDFE technology is obtained through the steps of CRC coding, scrambling, channel coding, constellation mapping, interleaving, adding pilot frequency, adding cyclic prefix, adding preamble, and shaping filtering. The unknown time-domain communication data and the agreed original time-domain pilot data also go through the above steps in order to obtain the agreed time-domain pilot data, which is not specifically limited here.

S12: performing Fourier transform with the same number of points on the unknown time-domain communication data and the agreed time-domain pilot data, respectively, to determine the unknown frequency-domain communication data and the agreed-upon frequency-domain pilot data in one-to-one correspondence;

Specifically, the unknown time-domain communication data can be obtained by processing the unknown time-domain communication data according to the Fourier transform (that is, the FFT transform), and the agreed time-domain pilot data can be processed in the same way according to the Fourier transform, The agreed frequency domain pilot data can be obtained. Here, the specific value of the points of the Fourier transform is not particularly limited, and may be determined according to actual requirements.

It should also be noted that, considering the signal sending and receiving requirements of the wireless transmission communication technology (that is, the SCDFE technology), before performing the Fourier transform, it is necessary to perform matching filtering, time-frequency Synchronization (including pseudo-code synchronization, timing synchronization (carrier synchronization), cyclic prefix removal and serial-to-parallel conversion and other data reception preprocessing, the reception preprocessing can be understood as: when sending the unknown time domain communication data and agreement Before domain pilot data, the inverse processing steps corresponding to the transmission preprocessing steps performed by the signal transmitter; similarly, the same above-mentioned receiving preprocessing steps are also performed on the agreed time domain pilot data, which will not be repeated here. Only the processed result can be used to perform Fourier transform with the same number of points.

S13: Process the agreed frequency-domain pilot data by using a preset frequency-domain notch strategy corresponding to the transmission distortion, so as to determine first de-distorted data;

Specifically, the transmission distortion includes distortion caused by interference and deep fading distortion, and one type of distortion corresponds to a preset frequency-domain notch strategy.

S14: Based on the first dedistortion data and pre-stored agreed time domain pilot data, determine to perform processing corresponding to transmission distortion on the unknown frequency domain communication data, so as to obtain second dedistortion data;

S15: Determine reconstructed time-domain communication data corresponding to the unknown time-domain communication data based on the second de-distorted data.

Specifically, for the second de-distorted data, the corresponding de-distorted time-domain data can be obtained by performing an inverse Fourier transform (ie, IFFT transform), and the de-distorted time-domain data is then sequentially despread (the reason for this The steps essentially correspond to the signal transmitter will perform direct sequence spread spectrum processing before sending out the communication signal) and the decision step (essentially, the above steps are the inverse steps corresponding to the data transmission preprocessing steps of the signal transmitter, so expand , the despreading and judging steps should specifically include deinterleaving, demapping, channel decoding, descrambling and CRC decoding steps), and finally reconstructed time domain communication data corresponding to unknown time domain communication data can be obtained.

To sum up, this application provides a transmission distortion processing method for communication signals, which realizes the de-distortion processing of unknown time domain communication data corresponding to the transmission distortion by using the agreed time domain pilot data to reduce the transmission distortion of the communication system. The bit error rate ensures the transmission performance of the entire communication system.

On the basis of above-mentioned embodiment:

As a preferred embodiment, based on the first dedistortion data and the pre-stored agreed time domain pilot data, it is determined to perform processing corresponding to transmission distortion on the unknown frequency domain communication data to obtain the second dedistortion data, including:

Perform Fourier transform on the pre-stored agreed time-domain pilot data to determine the abnormal frequency-domain pilot spectrum;

Determining the position of a frequency point where transmission distortion occurs in the non-abnormal frequency-domain pilot spectrum based on the first de-distortion data, the non-abnormal frequency-domain pilot spectrum, and a preset channel estimation strategy;

Based on the position of the frequency point and the preset frequency domain equalization strategy, it is determined to perform processing corresponding to the transmission distortion on the unknown frequency domain communication data, so as to obtain the second dedistorted data.

In this embodiment, the steps of determining the second de-distorted data are given, see the above for details, and will not be repeated here.

It should be noted that, in practical applications, the pre-stored agreed time-domain pilot data is essentially the same as the agreed time-domain pilot data sent by the signal transmitter, that is, both are agreed original time-domain pilot data The data obtained after data sending preprocessing. Correspondingly, as described in the above-mentioned embodiments, before performing the Fourier transform on the stored agreed time-domain pilot data, corresponding data receiving preprocessing steps should also be performed (see details in the above-mentioned embodiments. , which will not be repeated here), receive the preprocessed data and then perform Fourier transform with the same number of points to determine the frequency-domain pilot spectrum without abnormalities.

It can be seen that through the setting of the above logic, it is simple and reliable to obtain the second de-distorted data by relying on the first de-distorted data and the non-abnormal frequency-domain pilot spectrum guidance.

As a preferred embodiment, it is agreed that the time-domain pilot data is a CAZAC sequence including M sub-data, where M is the number of points.

In this embodiment, based on the fact that the CAZAC sequence is still a CAZAC sequence after Fourier transform, and the CAZAC sequence has a constant model characteristic, the agreed time-domain pilot data can be set to include M CAZAC sequences, and the CAZAC sequence can be expressed as The following forms:

表示

，

表示圆周率，

表示指数运算，

之间的各个整数，

是与

互质的一个正整数。in,

express

,

represents the circumference ratio,

Indicates exponential operation,

Each integer between,

With

A positive integer that is relatively prime.

It should be noted that M here may also be the number of points when performing inverse Fourier transform on the second dedistorted data, which is not specifically limited here.

As a preferred embodiment, the transmission distortion includes distortion caused by interference;

The agreed frequency domain pilot data is processed by using the preset frequency domain notch strategy corresponding to the transmission distortion to determine the first dedistortion data, including:

S21: Determine the interference distortion detection threshold based on the agreed frequency domain pilot data, where the agreed frequency domain pilot data includes M spectral lines in total, and M is the number of points;

S22: let k=1;

S23: Determine whether the kth interference parameter determined based on the first preset relational expression is not less than 0, if yes, go to S24; if not, go to S25;

Wherein, the first preset relational expression is:

为第k个干扰参数，

为干扰畸变检测门限值，

为约定频域导频数据中第k根谱线的幅度；

is the kth disturbance parameter,

is the threshold value of interference distortion detection,

is the amplitude of the kth spectral line in the agreed frequency domain pilot data;

更新为0；S24: The amplitude corresponding to the kth interference parameter

update to 0;

S25: let k=k+1;

S26: Determine whether k is not greater than M; if so, return to S23; if not, enter S27;

均小于0；若是，进入S28；若否，进入S29；S27: Determine whether all

Both are less than 0; if yes, go to S28; if not, go to S29;

S28: Determine that the currently processed agreed frequency domain pilot data is the first dedistortion data, and end the loop;

S29: Determine a new interference distortion detection threshold based on the amplitudes corresponding to the updated M spectral lines, and return to S22.

更新为0本质上即为一种频率陷波处理，于是，直到约定频域导频数据中各根谱线对应的

均小于0时，说明已经完成去干扰畸变的处理，因此，当前的处理后的所述约定频域导频数据即为第一去畸变数据。In this embodiment, the step of determining the first de-distorted data is given when the transmission distortion includes distortion caused by interference. For details, refer to the above description, which will not be repeated here. It should be noted that in step S24, the magnitude corresponding to the kth interference parameter

Updating to 0 is essentially a kind of frequency notch processing, so until it is agreed that each spectral line in the frequency domain pilot data corresponds to

When both are less than 0, it indicates that the processing of removing interference and distortion has been completed. Therefore, the agreed frequency-domain pilot data after the current processing is the first de-distortion data.

It should also be noted that the reason why the interference distortion can be suppressed based on the above-mentioned frequency notch method is that: relying on the SCFDE technology, the communication signals sent by the signal transmitter are essentially direct sequence spread spectrum signals. The spectrum of the corresponding direct sequence spread spectrum signal in the frequency domain will show a flat characteristic similar to that of white noise, and the narrowband interference signal corresponding to the distortion caused by the interference here will show an obvious spectrum peak in the frequency domain, as shown in the figure As shown in 2, therefore, the distortion caused by interference can be suppressed by using the frequency notch.

As a preferred embodiment, determining the interference distortion detection threshold based on the agreed frequency domain pilot data includes:

determining the first parameter based on the second preset relational expression;

The second preset relational expression is:

为第一参数；in,

is the first parameter;

determining the interference distortion detection threshold value based on the third preset relational expression and the first parameter;

The third preset relational expression is:

为干扰畸变检测门限值。in,

It is the threshold value of interference distortion detection.

In this embodiment, the steps for determining the threshold value of the interference distortion detection are given, see the above for details, and will not be repeated here. It should also be noted that the following proof can be given for the determination of the threshold value of interference distortion detection in this way:

服从均匀分布，且幅度的平方服从指数分布，指数分布的统计特征如下：Assuming that the agreed time-domain pilot data is a CAZAC sequence including M sub-data and M is the number of points of the Fourier transform, and the interference is the above-mentioned narrow-band interference, then based on the CAZAC sequence having a constant mode characteristic, under the condition of no narrow-band interference , the corresponding observation data in the frequency domain should be a Gaussian random sequence. It can be proved that the amplitude of the Gaussian random sequence obeys the Rayleigh distribution, and the phase is in the interval

Obey the uniform distribution, and the square of the magnitude obeys the exponential distribution, the statistical characteristics of the exponential distribution are as follows:

表示统计量的均值，

表示统计量的方差。针对干扰畸变检测门限值

，约定频域导频数据中第k根谱线的幅度的平方

不超过该门限值

的概率为：in,

represents the mean value of the statistic,

Indicates the variance of the statistic. Threshold value for detection of interference distortion

, the square of the amplitude of the kth spectral line in the frequency domain pilot data is agreed

does not exceed the threshold

The probability of is:

，且其中参数a取1，2，3，4，5，可以得到第k根谱线的幅度的平方的概率分布如表1所示：Take respectively

, and the parameter a takes 1, 2, 3, 4, 5, the probability distribution of the square of the magnitude of the kth spectral line can be obtained as shown in Table 1:

Table 1

，方差为

的分布。因此，当无窄带干扰存在时，经过傅里叶变换后，第k根谱线的幅度的平方大于

的概率为0.007，即显著性水平

条件下，无窄带干扰的谱线的幅度的平方大于

是不可能出现的小概率事件。因此，该假设检验问题的数学描述可以表述为：Therefore, the problem of de-interference and distortion can be transformed into a hypothesis testing problem, that is, assuming that there is no narrow-band interference, the squares of the amplitudes of the total M spectral lines after Fourier transform should obey the mean value

, with a variance of

Distribution. Therefore, when there is no narrow-band interference, after Fourier transform, the square of the amplitude of the kth spectral line is greater than

The probability of is 0.007, which is the significance level

Under the condition, the square of the magnitude of the spectral line without narrow-band interference is greater than

It is a small probability event that cannot happen. Therefore, the mathematical description of the hypothesis testing problem can be expressed as:

大于零，说明存在窄带干扰；

等于零，说明不存在窄带干扰，进而验证了上述实施例中对于干扰导致的畸变的去除方式的有效性。then,

If it is greater than zero, it means that there is narrow-band interference;

is equal to zero, indicating that there is no narrowband interference, and further verifies the effectiveness of the method for removing distortion caused by interference in the above embodiment.

As a preferred embodiment, the transmission distortion includes deep fading distortion;

The agreed frequency domain pilot data is processed by using the preset frequency domain notch strategy corresponding to the transmission distortion to determine the first dedistortion data, including:

S31: Determine the deep fading distortion detection threshold based on the agreed frequency domain pilot data, where the agreed frequency domain pilot data includes M spectral lines in total, and M is the number of points;

S32: Let j=1;

S33: Judging whether the jth depth fading parameter determined based on the fourth preset relational expression is not greater than 0, if yes, proceed to S34; if not, proceed to S35;

Wherein, the fourth preset relational expression is:

为第j个深度衰落参数，

为深度衰落畸变检测门限值，

为约定频域导频数据中第j根谱线的幅度；in,

is the jth depth fading parameter,

is the deep fading distortion detection threshold,

is the amplitude of the jth spectral line in the agreed frequency domain pilot data;

更新为0；S34: The amplitude corresponding to the jth depth fading parameter

update to 0;

S35: set j=j+1;

S36: Determine whether j is not greater than M; if so, return to S33; if not, enter S37;

均大于0；若是，进入S38；若否，进入S39；S37: Determine whether all

are greater than 0; if so, enter S38; if not, enter S39;

S38: Determine that the currently processed agreed frequency domain pilot data is the first dedistortion data, and end the loop;

S39: Determine a new deep fading distortion detection threshold based on the updated amplitudes corresponding to the M spectral lines, and return to S32.

The inventor further considers that communication data (signal) is affected by factors such as multipath channels and antenna directivity during transmission, which may cause deep fading distortion in its response in the frequency domain, that is, deep fading frequency points, resulting in The noise is significantly amplified in the subsequent frequency domain equalization process, which restricts the stability of wireless communication transmission. Specifically, please refer to FIG. 3 , on the basis of the elaboration of the above-mentioned embodiments, a schematic diagram of displaying deep fading in the frequency spectrum of a direct-sequence spread spectrum signal is given.

Therefore, in this embodiment, the step of determining the first de-distortion data when the transmission distortion includes deep fading distortion is given, see the above description for details, and details will not be repeated here. It can be understood that the transmission distortion may include the above two distortions and corresponding subsequent processing steps at the same time.

更新为0本质上即为一种频率陷波处理，于是，直到约定频域导频数据中各根谱线对应的

均大于0时，说明已完成去深度衰落畸变的处理，因此，当前的处理后的所述约定频域导频数据即为第一去畸变数据。It should be noted that in step S34, the magnitude corresponding to the jth depth fading parameter

Updating to 0 is essentially a kind of frequency notch processing, so until it is agreed that each spectral line in the frequency domain pilot data corresponds to

When both are greater than 0, it indicates that the processing of removing the deep fading distortion has been completed. Therefore, the agreed frequency-domain pilot data after the current processing is the first de-distortion data.

As a preferred embodiment, determining the deep fading distortion detection threshold based on the agreed frequency domain pilot data includes:

determining the second parameter based on the fifth preset relational expression;

Among them, the fifth preset relational expression is:

为第二参数；in,

is the second parameter;

determining the depth fading distortion detection threshold based on the sixth preset relational expression;

The sixth preset relational expression is:

为深度衰落畸变检测门限值。in,

It is the threshold value for deep fading distortion detection.

In this embodiment, the steps of determining the threshold value of the deep fading distortion detection are given, and details are described above, which will not be repeated here. It should also be noted that the following proof can be given for the determination of the threshold value of deep fading distortion detection in this way:

，约定频域导频数据中第j根谱线的幅度的平方

不超过该门限值

的概率为：Assuming that the agreed time-domain pilot data is a CAZAC sequence including M sub-data and M is the number of points of the Fourier transform, then based on the CAZAC sequence having a constant mode characteristic, it can be known in the same way that under the condition of no deep fading, its The corresponding observation data in the frequency domain should be a Gaussian random sequence. Detection Threshold for Deep Fading Distortion

, the square of the amplitude of the jth spectral line in the frequency domain pilot data is agreed

does not exceed the threshold

The probability of is:

，其中参数b取0.1，0.05，0.02，0.01，可以得到第j根谱线的幅度的平方的概率分布如表2所示：Take respectively

, where the parameter b takes 0.1, 0.05, 0.02, 0.01, the probability distribution of the square of the magnitude of the jth spectral line can be obtained as shown in Table 2:

Table 2

，方差为

的分布。因此，当信号中无深度衰落畸变存在时，经过傅里叶变换后，第j根谱线的幅度的平方小于

的概率为0.01，即显著性水平

条件下，无深度衰落的谱线的幅度的平方小于

是不可能出现的小概率事件。因此，该假设检验问题的数学描述可以表述为：Therefore, the problem of removing deep fading distortion can be transformed into a hypothesis testing problem, that is, assuming that there is no deep fading, the squares of the amplitudes of the total M spectral lines after Fourier transform should obey the mean value

, with a variance of

Distribution. Therefore, when there is no deep fading distortion in the signal, after Fourier transform, the square of the amplitude of the jth spectral line is less than

The probability of is 0.01, which is the significance level

Under the condition, the square of the amplitude of the spectral line without deep fading is less than

It is a small probability event that cannot happen. Therefore, the mathematical description of the hypothesis testing problem can be expressed as:

Therefore, if W is less than zero, it indicates that there is deep fading; if W is equal to zero, it indicates that there is no deep fading, which further verifies the effectiveness of the method for removing deep fading distortion in the above embodiment.

Please refer to FIG. 4 . FIG. 4 is a schematic structural diagram of a communication signal transmission distortion processing system provided by the present invention.

The transmission distortion processing system of the communication signal includes:

An acquisition unit 41, configured to acquire unknown time domain communication data and agreed time domain pilot data sent by the signal transmitter;

The time-frequency transformation unit 42 is used to perform Fourier transform with the same number of points on the unknown time-domain communication data and the agreed time-domain pilot data respectively, so as to determine the unknown frequency-domain communication data and the agreed-upon frequency-domain pilot data in one-to-one correspondence;

The first processing unit 43 is configured to process the agreed frequency domain pilot data by using a preset frequency domain notch strategy corresponding to the transmission distortion, so as to determine the first dedistortion data;

The second processing unit 44 is configured to determine, based on the first dedistortion data and pre-stored agreed time domain pilot data, to perform processing corresponding to transmission distortion on the unknown frequency domain communication data, so as to obtain second dedistortion data;

The data reproducing unit 45 is configured to determine reconstructed time domain communication data corresponding to the unknown time domain communication data based on the second dedistortion data.

For the introduction of the communication signal transmission distortion processing system provided in the present invention, please refer to the above embodiment of the communication signal transmission distortion processing method, which will not be repeated here.

As a preferred embodiment, the second processing unit 44 specifically includes:

A non-abnormal frequency-domain pilot spectrum determining unit, configured to perform the Fourier transform on the pre-stored agreed time-domain pilot data to determine the non-abnormal frequency-domain pilot spectrum;

A frequency point position determination unit, configured to determine a frequency where the transmission distortion occurs in the non-abnormal frequency domain pilot spectrum based on the first dedistortion data, the non-abnormal frequency domain pilot spectrum, and a preset channel estimation strategy point position;

The second dedistortion data determining unit is configured to determine, based on the frequency point position and a preset frequency domain equalization strategy, to perform processing corresponding to the transmission distortion on the unknown frequency domain communication data, so as to obtain second dedistortion data.

As a preferred embodiment, the transmission distortion includes distortion caused by interference;

The first processing unit 43 specifically includes:

An interference distortion detection threshold determination unit, configured to determine an interference distortion detection threshold based on the agreed frequency domain pilot data, wherein the agreed frequency domain pilot data includes M spectral lines in total, and M is the number of points ;

The first assignment unit is used to make k=1;

The first judging unit is configured to judge whether the kth interference parameter determined based on the first preset relational expression is not less than 0, if so, trigger the first amplitude updating unit; if not, trigger the second value assignment unit;

Wherein, the first preset relational expression is:

为第k个干扰参数，

为所述干扰畸变检测门限值，

为所述约定频域导频数据中第k根谱线的幅度；

is the kth disturbance parameter,

is the detection threshold value of the interference distortion,

is the amplitude of the kth spectral line in the agreed frequency domain pilot data;

更新为0；并触发第二判断单元；The first amplitude update unit is configured to update the amplitude corresponding to the kth interference parameter

update to 0; and trigger the second judging unit;

The second assignment unit is used to set k=k+1; and trigger the second judging unit;

The second judging unit is used to judge whether the k is not greater than M; if so, return to the first judging unit; if not, trigger the third judging unit;

均小于0；若是，触发第一数据确定单元；若否，触发第一门限值更新单元；The third judging unit is used to judge whether all

are less than 0; if yes, trigger the first data determination unit; if not, trigger the first threshold update unit;

The first data determination unit is configured to determine that the currently processed agreed frequency domain pilot data is the first dedistortion data, and end the loop;

The first threshold updating unit is configured to determine a new interference distortion detection threshold based on the amplitudes corresponding to the updated M spectral lines, and trigger the first evaluation unit.

The interference distortion detection threshold determination unit specifically includes:

a first parameter determination unit, configured to determine a first parameter based on a second preset relational expression;

The second preset relational expression is:

为所述第一参数；in,

is the first parameter;

A first threshold value determination unit, configured to determine a threshold value for interference distortion detection based on a third preset relational expression and the first parameter;

The third preset relational expression is:

为所述干扰畸变检测门限值。in,

A threshold value is detected for the interference distortion.

As a preferred embodiment, the transmission distortion includes deep fading distortion;

The first processing unit 43 specifically includes:

A deep fading distortion detection threshold determination unit, configured to determine a deep fading distortion detection threshold based on the agreed frequency domain pilot data, wherein the agreed frequency domain pilot data includes M spectral lines in total, and M is the stated points;

The third assignment unit is used to set j=1;

The fourth judging unit is used to judge whether the jth depth fading parameter determined based on the fourth preset relational expression is not greater than 0, if so, trigger the second amplitude updating unit; if not, trigger the fourth assignment unit;

Wherein, the fourth preset relational expression is:

为所述第j个深度衰落参数，

为所述深度衰落畸变检测门限值，

为所述约定频域导频数据中第j根谱线的幅度；in,

is the jth depth fading parameter,

is the depth fading distortion detection threshold value,

is the amplitude of the jth spectral line in the agreed frequency domain pilot data;

更新为0；并触发第五判断单元；The second amplitude update unit is used to update the amplitude corresponding to the jth depth fading parameter

update to 0; and trigger the fifth judging unit;

The fourth assignment unit is used to set j=j+1;

The fifth judging unit is used to judge whether the j is not greater than M; if so, return to the fourth judging unit; if not, trigger the sixth judging unit;

均大于0；若是，触发第二数据确定单元；若否，触发第二门限值更新单元；The sixth judging unit is used to judge whether all

are greater than 0; if so, trigger the second data determination unit; if not, trigger the second threshold update unit;

The second data determination unit is configured to determine that the currently processed agreed frequency domain pilot data is the first dedistortion data, and end the loop;

The second threshold updating unit is configured to determine a new deep fading distortion detection threshold based on the updated amplitudes corresponding to the M spectral lines, and trigger the third assigning unit.

As a preferred embodiment, the depth fading distortion detection threshold determination unit specifically includes:

a second parameter determining unit, configured to determine a second parameter based on a fifth preset relational expression;

Wherein, the fifth preset relational expression is:

为所述第二参数；in,

is the second parameter;

A second threshold value determining unit, configured to determine a deep fading distortion detection threshold based on a sixth preset relational expression;

The sixth preset relational expression is:

为所述深度衰落畸变检测门限值。in,

A threshold value is detected for the deep fading distortion.

Please refer to FIG. 5 . FIG. 5 is a schematic structural diagram of a communication signal transmission distortion processing device provided by the present invention.

The transmission distortion processing device of the communication signal includes:

memory 51 for storing computer programs;

The processor 52 is configured to execute the steps of the method for processing the transmission distortion of the communication signal as described above.

For the introduction of the communication signal transmission distortion processing device provided in the present invention, please refer to the above embodiment of the communication signal transmission distortion processing method, which will not be repeated here.

The present invention also provides a computer-readable storage medium, comprising:

A computer program is stored on the computer-readable storage medium, and when the computer program is executed by the processor, the steps of the method for processing the transmission distortion of the communication signal as described above are realized.

For the introduction of the computer-readable storage medium provided in the present invention, please refer to the above-mentioned embodiment of the method for processing the transmission distortion of the communication signal, which will not be repeated here.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other. Relational terms such as first and second, etc. are used only to distinguish one entity or operation from another and do not necessarily require or imply any such actual relationship or relationship between these entities or operations. order. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

Professionals can further realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the possible For interchangeability, in the above description, the composition and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present invention. The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A method for processing transmission distortion of a communication signal, comprising:

acquiring unknown time domain communication data and appointed time domain pilot frequency data sent by a signal transmitter;

respectively carrying out Fourier transform with the same number on the unknown time domain communication data and the appointed time domain pilot frequency data to determine the unknown frequency domain communication data and the appointed frequency domain pilot frequency data in a one-to-one correspondence manner;

processing the appointed frequency domain pilot data by using a preset frequency domain notch strategy corresponding to the transmission distortion to determine first distortion removal data;

determining to perform processing corresponding to the transmission distortion on the unknown frequency domain communication data based on the first distortion removal data and the pre-stored appointed time domain pilot data to obtain second distortion removal data;

determining reconstructed time domain communication data corresponding to the unknown time domain communication data based on the second undistorted data;

wherein, determining to perform processing corresponding to the transmission distortion on the unknown frequency domain communication data based on the first undistorted data and the pre-stored agreed time domain pilot data to obtain second undistorted data comprises:

performing the Fourier transform on the pre-stored appointed time domain pilot data to determine abnormal-free frequency domain pilot data;

determining the position of a frequency point with transmission distortion in the abnormal frequency domain pilot frequency data based on the first distortion removal data, the abnormal frequency domain pilot frequency data and a preset channel estimation strategy;

and determining to perform processing corresponding to the transmission distortion on the unknown frequency domain communication data based on the frequency point position and a preset frequency domain equalization strategy so as to obtain second distortion removal data.

2. The method for processing transmission distortion of a communication signal according to claim 1, wherein the predetermined time domain pilot data is a CAZAC sequence including M sub-data, M being the number of points.

3. A transmission distortion processing method of a communication signal according to claim 1 or 2, wherein the transmission distortion includes distortion caused by interference;

processing the appointed frequency domain pilot data by using a preset frequency domain notching strategy corresponding to the transmission distortion to determine first distortion removal data, comprising:

s21: determining an interference distortion detection threshold value based on the appointed frequency domain pilot data, wherein the appointed frequency domain pilot data comprises M spectral lines in total, and M is the point number;

s22: let k =1;

s23: judging whether the kth interference parameter determined based on the first preset relational expression is not less than 0, if so, entering S24; if not, entering S25;

wherein the first preset relational expression is as follows:

for the k-th interference parameter, the interference parameter,

a threshold value is detected for the interference distortion,

the amplitude of the kth spectral line in the appointed frequency domain pilot frequency data is obtained;

s24: the amplitude corresponding to the k interference parameter is calculated

Updating to 0;

s25: let k = k +1;

s26: judging whether k is not more than M; if yes, returning to S23; if not, the process goes to S27;

s27: determine whether all

Are all less than 0; if yes, entering S28; if not, the step S29 is entered;

s28: determining the currently processed appointed frequency domain pilot data as first distortion removal data, and ending the circulation;

s29: and determining a new interference distortion detection threshold value based on the updated amplitudes corresponding to the M spectral lines, and returning to the step S22.

4. The method of claim 3, wherein determining an interference distortion detection threshold based on the default frequency domain pilot data comprises:

determining a first parameter based on a second preset relation;

the second preset relational expression is as follows:

wherein,

is the first parameter;

determining an interference distortion detection threshold value based on a third preset relational expression and the first parameter;

the third preset relational expression is as follows:

wherein,

a threshold value is detected for the interference distortion.

5. A method for processing transmission distortion of a communication signal according to claim 1 or 2, wherein the transmission distortion comprises deep fading distortion;

processing the appointed frequency domain pilot data by using a preset frequency domain notch strategy corresponding to the transmission distortion to determine first distortion-removed data, comprising:

s31: determining a deep fading distortion detection threshold value based on the appointed frequency domain pilot frequency data, wherein the appointed frequency domain pilot frequency data comprises M spectral lines in total, and M is the point number;

s32: let j =1;

s33: judging whether the jth depth fading parameter determined based on the fourth preset relational expression is not greater than 0, if so, entering S34; if not, entering S35;

wherein the fourth predetermined relationship is:

wherein,

for the said jth deep fading parameter,

a threshold value is detected for the deep fade distortion,

the amplitude of the jth spectral line in the appointed frequency domain pilot frequency data is obtained;

s34: the amplitude corresponding to the jth deep fading parameter

Updating to 0;

s35: let j = j +1;

s36: judging whether j is not more than M; if yes, returning to S33; if not, entering S37;

s37: determine whether all

Are all larger than 0; if yes, entering S38; if not, entering S39;

s38: determining the currently processed appointed frequency domain pilot data as first distortion removal data, and ending the circulation;

s39: and determining a new depth fading distortion detection threshold value based on the updated amplitudes corresponding to the M spectral lines, and returning to the step S32.

6. The method of claim 5, wherein determining a deep fade distortion detection threshold based on the default frequency domain pilot data comprises:

determining a second parameter based on a fifth preset relation;

wherein the fifth predetermined relationship is:

wherein,

is the second parameter;

determining a depth fading distortion detection threshold value based on a sixth preset relational expression;

the sixth preset relational expression is as follows:

wherein,

a threshold value is detected for the deep fade distortion.

7. A system for handling transmission distortion of a communication signal, comprising:

the acquisition unit is used for acquiring unknown time domain communication data and appointed time domain pilot frequency data sent by the signal transmitter;

the time-frequency transformation unit is used for respectively carrying out Fourier transformation with the same point number on the unknown time domain communication data and the appointed time domain pilot frequency data so as to determine the unknown frequency domain communication data and the appointed frequency domain pilot frequency data in a one-to-one correspondence manner;

a first processing unit, configured to process the appointed frequency domain pilot data by using a preset frequency domain notching strategy corresponding to the transmission distortion to determine first distortion removal data;

the second processing unit is used for determining to perform processing corresponding to the transmission distortion on the unknown frequency domain communication data based on the first distortion removal data and the pre-stored appointed time domain pilot data so as to obtain second distortion removal data;

a data reproduction unit, configured to determine reconstructed time domain communication data corresponding to the unknown time domain communication data based on the second undistorted data;

wherein, the second processing unit specifically comprises:

the abnormal-free frequency domain pilot frequency spectrum determining unit is used for carrying out Fourier transform on the prestored conventional time domain pilot frequency data so as to determine abnormal-free frequency domain pilot frequency data;

a frequency point position determining unit, configured to determine a frequency point position where the transmission distortion occurs in the abnormal frequency domain pilot data based on the first distortion removal data, the abnormal frequency domain pilot data, and a preset channel estimation policy;

and the second distortion removal data determining unit is used for determining to perform processing corresponding to the transmission distortion on the unknown frequency domain communication data based on the frequency point position and a preset frequency domain balancing strategy so as to obtain second distortion removal data.

8. A transmission distortion processing apparatus for a communication signal, comprising:

a memory for storing a computer program;

processor for performing the steps of the method for transmission distortion processing of a communication signal according to any of claims 1 to 6.

9. A computer-readable storage medium, comprising:

the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the method of processing transmission distortion of a communication signal according to any one of claims 1 to 6.

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