JP2001189678A - Synthesizer radio equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a simplified synthesizer circuit in small scale. SOLUTION: A first local oscillation signal from a first synthesizer part 101 is duplexed by a duplexer 106 and outputted to a first mixer 4 as a local oscillation signal for receiving. A fourth mixer 103 mixes the first local oscillation signal and a second local oscillation signal from a second synthesizer part 102 and a first band pass filter 104 selects the signal of the added frequency component of first and second local oscillation signals and outputs the result to a third mixer 14 as a local oscillation signal for transmitting. A second band pass filter 105 selects the signal of the subtracted frequency component of first and second local oscillation signals and outputs the result to a modulator 12 as a local oscillation signal for modulation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthesizer radio used for a cordless telephone or a mobile communication device.

[0002]

2. Description of the Related Art FIG. 7 is a block diagram showing a configuration of a conventional synthesizer radio. This synthesizer radio uses FDD (FDD) that uses different frequencies for transmission and reception.
frequency Division Duplex)
Mode radio. In FIG. 7, 1 is an antenna for radiating or receiving radio waves, 2 is a receiving bandpass filter for removing unnecessary components from the received high-frequency signal, 3 is a receiving high-frequency amplifier for amplifying the received high-frequency signal, and 4 is an amplified received high-frequency signal. And a local mixer for reception from the synthesizer for reception 301 to convert the signal into a first intermediate frequency signal for reception.

In FIG. 7, reference numeral 5 denotes a reception intermediate frequency band-pass filter for passing a reception first intermediate frequency signal;
Reference numeral 6 denotes a reception intermediate frequency amplifier that amplifies the reception first intermediate frequency signal, reference numeral 7 denotes a local oscillator that oscillates a predetermined local oscillation signal, and reference numeral 8 denotes an amplified reception first intermediate frequency signal and a local oscillation signal from the local oscillator 7. , A demodulator 9 for amplifying the received second intermediate frequency signal, limiting the amplitude, detecting and reproducing the signal, and 10 a signal demodulated at the time of reception. A signal processing unit for outputting data such as voice from the interface and for generating a waveform of the data transmitted from the interface / user tool unit 11 at the time of transmission. An interface / user 11 processes data to the user or data from the user. The tool section.

Further, in FIG. 7, reference numeral 12 denotes a modulator for modulating a transmission signal subjected to waveform shaping processing by the signal processing unit 10 with a modulation local oscillation signal from a modulation synthesizer unit 302 and outputting a transmission intermediate frequency signal. , 13 is a transmission intermediate frequency amplifier that amplifies the transmission intermediate frequency signal, and 14 is the amplified transmission intermediate frequency signal and the transmission synthesizer unit 30.
A third mixer that mixes the transmission local signal from 3 and outputs a transmission high-frequency signal, 15 is a transmission high-frequency amplifier that power-amplifies the transmission high-frequency signal, and 16 is an unnecessary radiation of the power-amplified transmission high-frequency signal. This is a transmission bandpass filter to be removed.

Further, in FIG. 7, reference numeral 21 denotes a system controller for controlling the setting of frequency channels of the receiving synthesizer 301, the modulating synthesizer 302 and the transmitting synthesizer 303, and 22 denotes a receiving synthesizer 301, a modulating synthesizer. The reference oscillator oscillates a signal of a reference frequency of the unit 302 and the transmission synthesizer unit 303.

Further, in FIG. 7, reference numeral 301 denotes a receiving synthesizer section for outputting a local oscillation signal for reception to the first mixer 4; 302, a synthesizing section for outputting a local oscillation signal for modulation to the modulator 12; Is the third signal from the transmitting station.
A transmission synthesizer section that outputs the signal to the mixer 14.

[0007] Further, in FIG.
Reference numeral 331 denotes a VCO (Voltage Controlled Oscillator) in the reception synthesizer 301, the modulation synthesizer 302, and the transmission synthesizer 303, 312, 3 respectively.
Reference numerals 22 and 332 denote receiving synthesizer units 30 respectively.
1. PLL (Phase Locke) in the modulation synthesizer 302 and the transmission synthesizer 303
d Loop), 313, 323, and 333 are LPs in the reception synthesizer 301, the modulation synthesizer 302, and the transmission synthesizer 303, respectively.
F (low-pass filter).

Next, the operation will be described. The reception high-frequency signal received by the antenna 1 is subjected to removal of unnecessary components by the reception band-pass filter 2, amplified by the reception high-frequency amplifier 3, and sent to the first mixer 4. First mixer 4
Is the reception high-frequency signal and the reception synthesizer 30
The signal is mixed with the reception local oscillation signal from No. 1 and converted into a frequency signal component having a difference between the respective signals to output a reception first intermediate frequency signal.

The reception first intermediate frequency signal is selected only in a predetermined band by the reception intermediate frequency band pass filter 5, amplified by the reception intermediate frequency amplifier 6, and sent to the second mixer 8. The second mixer 8 mixes the received first intermediate frequency signal with a local signal from the local oscillator 7 and converts the mixed signal into a received second intermediate frequency signal. The demodulator 9 amplifies the received second intermediate frequency signal, limits the amplitude of the signal, detects the signal, demodulates the data, and outputs the data to the signal processing unit 10.
The signal processing unit 10 processes the data and sends it to the interface / user tool unit 11. The interface / user tool section 11 sends out all data including voice in a form desired by the user.

When transmitting data, the interface / user tool unit 11 processes data from the user, and the signal processing unit 10 performs processing such as waveform generation, band limitation, and amplitude limitation to obtain a transmission signal. The signal is sent to the modulator 12. The modulator 12 mixes the transmission signal with the modulation local oscillation signal from the modulation synthesizer section 302 and outputs it as a transmission intermediate frequency signal. The transmission intermediate frequency signal is amplified by the transmission intermediate frequency amplifier 13 and output to the third mixer 14. The third mixer 14 includes a synthesizer section 303 for transmission.
And a transmission intermediate frequency signal from the transmission intermediate frequency amplifier 13 to output a transmission high frequency signal. The transmission high-frequency signal is power-amplified by the transmission high-frequency amplifier 15 and unnecessary radiation is removed by the transmission band-pass filter 16, and then output from the antenna 1.

The setting of the receiving channel is performed by the receiving synthesizer 301. The PLL 312 operates based on the reference frequency from the reference oscillator 22, and operates based on the frequency set by the system controller 21 and the VCO 311.
And outputs the error as a frequency determination voltage. This frequency determining voltage is integrated by the LPF 313, and the rectified voltage is input to the VCO 311. The VCO 311 outputs a local signal having a frequency corresponding to the input rectified voltage, thereby setting a reception channel. This local oscillation signal is output to the first mixer 4 as a reception local oscillation signal.

On the other hand, the setting of the transmission channel is performed by the transmission synthesizer 303. The transmitting synthesizer 303 includes a VCO 331, a PLL 332, and an LPF 33.
3, a loop is formed, and a transmission channel is set in the same manner as the reception synthesizer section 301. Further, the frequency of the modulation local oscillation signal is set by the modulation synthesizer unit 302 in the same manner as the reception synthesizer unit 301.

In this manner, the frequency of the local signal for reception, the frequency of the local signal for transmission, and the frequency of the local signal for modulation can be set. Since the frequency difference between the frequencies is determined by the Radio Law in Japan, for example, if one is set, the other is automatically determined.

[0014]

As described above, the conventional synthesizer radio apparatus has a receiving synthesizer unit 30.
1, the frequency synthesizer section 302 and the transmit synthesizer section 303 are composed of three synthesizers, so that the frequency can be set independently for transmission and reception, but the circuit of the synthesizer section becomes complicated and large-scale. ,
There has been a problem that the component cost is high and the mounting area is large. In particular, in mobile communication, since the frequency interval between the frequency of the transmission high-frequency signal and the frequency of the reception high-frequency signal is defined, the fact that setting the frequency arbitrarily is not a significant effect.

Although the synthesizer radio shown in FIG. 7 can use only one type of transmission rate, it uses different frequencies for transmission and reception, so that it can separate transmission and reception by frequency, in addition to the FDD mode. , TDD (Time Division) that separates transmission and reception by time division
In a system in which the transmission rate is variable, such as a dual mode wireless device that realizes the Duplex mode with a single wireless device, the circuit of the synthesizer section becomes more complicated and large-scale, the component cost is higher, and the mounting area is further increased. There was a problem of becoming larger.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to obtain a synthesizer radio having a synthesizer section having a simple and small circuit, a low component cost and a small mounting area. And

[0017]

A synthesizer radio according to the present invention converts a received high frequency signal into a first intermediate frequency signal received by a first mixer, and converts the first intermediate frequency signal into a second mixed signal. The signal is converted into a received second intermediate frequency signal by a modulator and demodulated, and the transmission signal is converted into a transmission intermediate frequency signal by a modulator, and the transmission intermediate frequency signal is converted into a transmission high frequency signal by a third mixer and transmitted. A first synthesizer section for outputting a first local signal corresponding to a frequency channel; a second synthesizer section for outputting a second local signal corresponding to the frequency channel;
A doubler for doubling the frequency of the first local oscillation signal and outputting the same as a receiving local oscillation signal to the first mixer; and a fourth mixer for mixing the first local oscillation signal and the second local oscillation signal. And a first band pass for selecting a signal of an added frequency component of the first local signal and the second local signal from the fourth mixer and outputting the signal as a local signal for transmission to the third mixer. A filter, and a second band-pass that selects a signal of a subtraction frequency component of the first local oscillation signal and the second local oscillation signal from the fourth mixer and outputs the signal as a modulation local oscillation signal to the second mixer. And a filter.

The synthesizer radio according to the present invention comprises:
The received received high-frequency signal is converted into a received first intermediate frequency signal by a first mixer, and the received first intermediate frequency signal is converted to a second received intermediate frequency signal.
The mixer converts the signal into a reception second intermediate frequency signal and demodulates the signal. The transmission signal is converted into a transmission intermediate frequency signal by a modulator, and the transmission intermediate frequency signal is converted into a transmission high frequency signal by a third mixer and transmitted. A first synthesizer section for outputting a first local signal corresponding to a frequency channel, a second synthesizer section for outputting a second local signal corresponding to the frequency channel, and a first synthesizer section for outputting the first local signal. A doubler for doubling the frequency and outputting it as a transmission local oscillation signal to the third mixer; a first local oscillation signal and the second local oscillation signal;
A fourth mixer for mixing the local oscillator signals, and a signal of the added frequency component of the first local oscillator signal and the second local oscillator signal is selected from the fourth mixer, and the first local oscillator signal is selected as the receiving local oscillator signal. A first band-pass filter to be output to a mixer, and a signal of a subtraction frequency component of the first local oscillation signal and the second local oscillation signal selected from the fourth mixer, and the second local oscillation signal as a modulation local oscillation signal. And a second band-pass filter for outputting to the mixer.

The synthesizer radio according to the present invention comprises:
The received received high-frequency signal is converted into a received first intermediate frequency signal by a first mixer, and the received first intermediate frequency signal is converted to a second received intermediate frequency signal.
The mixer converts the signal into a received second intermediate frequency signal and demodulates the signal. The transmission signal is converted into a transmission intermediate frequency signal by the first modulator, and the transmission intermediate frequency signal is converted into a transmission high frequency signal by the third mixer. And a FDD mode transmission / reception system for transmitting the received intermediate frequency signal to a received first intermediate frequency signal by a fifth mixer and converting the received first intermediate frequency signal to a received second intermediate frequency signal by a sixth mixer. And a TDD mode transmission / reception system that converts the transmission signal to a transmission intermediate frequency signal by a second modulator, converts the transmission intermediate frequency signal to a transmission high frequency signal by a seventh mixer, and transmits the signal. And outputting a first local oscillation signal corresponding to a frequency channel, and using the first local oscillation signal as the reception local oscillation signal in the FDD mode.
A first synthesizer section for outputting to the mixer, a second local oscillator signal corresponding to the frequency channel, and the second local oscillator signal as the FDD mode transmitting local oscillator signal to the third mixer. A second synthesizer section for outputting, a fourth mixer for mixing the first local signal and the second local signal, and a fourth mixer for generating the first local signal and the second local signal from the fourth mixer. A first band that selects a signal of the added frequency component and outputs the signal as the local signal for reception in the TDD mode to the fifth mixer and outputs the signal as the local signal for transmission in the TDD mode to the seventh mixer; A pass filter and a signal of a subtraction frequency component of the first local signal and the second local signal from the fourth mixer are selected and output to the first modulator as the FDD mode modulation local signal. And the above TDD As modulation local oscillation signal of the over-de is obtained and a second bandpass filter for outputting to the second modulator.

The synthesizer radio according to the present invention comprises:
The transmission / reception system in the TDD mode is used for high-speed data communication such as image data, and the transmission / reception system in the FDD mode is used for low-speed data communication such as voice data.

The synthesizer radio according to the present invention comprises:
Using the transmission / reception system of TDD mode for high-speed data communication,
The DD mode transmission / reception system is used for data retransmission when an error occurs in the high-speed data communication.

The synthesizer radio according to the present invention comprises:
Using the transmission / reception system of TDD mode for high-speed data communication,
The transmission / reception system in the DD mode is used for communication of control data and monitoring data.

The synthesizer radio according to the present invention comprises:
Using the transmission / reception system of TDD mode for high-speed data communication,
The transmission / reception system of the DD mode is used for transmitting / receiving the transmission / reception switching signal of the transmission / reception system of the TDD mode.

[0024] The synthesizer radio according to the present invention comprises:
The first local signal or the second signal output by the first synthesizer unit
The second local signal output from the synthesizer section is supplied as a system clock of a circuit section existing inside.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a block diagram showing a configuration of a synthesizer radio according to Embodiment 1 of the present invention. The synthesizer radio in this embodiment is an FDD mode radio that uses different frequencies for transmission and reception, similarly to the conventional synthesizer radio shown in FIG.

In FIG. 1, reference numeral 101 denotes a VCO 111, P
LL112, LPF113, receiving local oscillation signal,
A first synthesizer section 102 for outputting a first local oscillation signal for generating a transmission local oscillation signal and a modulation local oscillation signal includes a VCO 121, a PLL 122, and an LPF 123,
A second synthesizer unit that outputs a second local oscillation signal for generating a transmission local oscillation signal and a modulation local oscillation signal.

In FIG. 1, reference numeral 103 denotes a mixture of the first local signal from the first synthesizer unit 101 and the second local signal from the second synthesizer unit 102, and the frequency component of the first local signal and the second local signal are mixed. The fourth mixer 104 outputs a signal of an addition frequency component with the frequency component of the two-station signal and a signal of the subtraction frequency component, and the fourth mixer 104 transmits the signal of the addition frequency component output from the fourth mixer 103 to the transmitting station. A first band-pass filter selected as a signal and output to the third mixer 14;
A second band-pass filter 05 selects a signal of the subtraction frequency component output from the fourth mixer 103 as a modulation local oscillation signal and outputs the signal to the modulator 12.

Further, in FIG. 1, a doubler 106 doubles the frequency component of the first local oscillation signal from the first synthesizer section 101 and outputs it to the first mixer 4 as a local oscillation signal for reception. . The synthesizer unit 100 includes a first synthesizer unit 101, a second synthesizer unit 102,
It comprises a fourth mixer 103, a first bandpass filter 104, a second bandpass filter 105 and a doubler 106. The other configuration is the same as the conventional configuration shown in FIG.

Next, the operation will be described. The operations of the receiving system and the transmitting system except for the synthesizer unit 100 are the same as those in the related art, and a description thereof will be omitted. Here, the operation of the synthesizer unit 100 will be described. The operations of the first synthesizer unit 101 and the second synthesizer unit 102 are the same as those of the conventional synthesizer units shown in FIG. 7, and the first local oscillator signal and the second local oscillator signal corresponding to the frequency set by the system controller 21. An emission signal is output. The frequency of the first local oscillator signal output from the first synthesizer unit 101 is doubled by the doubler 106 and output to the first mixer 4 as a local oscillator signal for reception.

The first local signal from the first synthesizer section 101 and the second local signal from the second synthesizer section 102 are mixed by a fourth mixer 103, and the sum and difference of their frequency components are calculated. A frequency component is generated as a signal of an addition frequency component and a signal of a subtraction frequency component, respectively. Of these frequency component signals, the addition frequency component signal is selected by the first band-pass filter 104 as a transmission local oscillation signal, output to the third mixer 14, and the subtraction frequency component signal is output from the modulation local oscillation signal. The signal is selected by the second band-pass filter 105 and output to the modulator 12. As described above, the reception channel and the transmission channel are set.

Next, in the reception channel and the transmission channel,
The relationship between the frequencies of the respective channels will be described. Receiving
High-frequency reception received from the high-frequency amplifier 3 and input to the first mixer 4
The frequency of the wave signal is F_R , Output from the doubler 106
Set the frequency of the receiving station signal to F _RL, Output from the first mixer 4
The frequency of the received first intermediate frequency signal_RIF , 1st
Of the first local oscillation signal output from the synthesizer section 101.
Wave number is F₁ And the transmission height output from the third mixer 14
The frequency of the frequency signal is F_T , First bandpass filter 10
4 to the third mixer 14.
Wave number is F_TL, Transmission intermediate frequency amplifier 13 to third mixer 1
4 is the frequency of the transmission intermediate frequency signal input to F_TIF ,
Input to the modulator 12 from the two-bandpass filter 105
The frequency of the modulation local oscillation signal_MOD , The second synthesizer
The frequency of the second local oscillation signal output from the_Two 
And the frequency channel spacing is ΔF, the following relationship is obtained:
can get.

[0032] _{F R = F RIF + F RL} F T = F TIF + F TL F TIF = F MOD F RL = 2 · F 1 F TL = F 1 + F 2 F MOD = | F 1 -F 2 |

From the above relationship, the set frequency interval between the first local signal and the second local signal is set to the frequency channel set interval ΔF
Assuming ΔF / 2, which is one half of
The relationship when shifted is as follows.

Accordingly, from the above relationship, the first local oscillation signal and the second
Even if the frequency setting of the two-station signal is shifted by 1CH,
Frequency F of the local oscillation signal for reception_RLAnd the frequency of the local signal for transmission
Number F _TLIs shifted by ΔF, that is, 1CH, and the modulation
Signal frequency F_MOD Does not matter if you change the channel setting
In particular, the frequency of the first local signal and the frequency of the second local signal
And the frequency F of the received high-frequency signal_R 
And the frequency F of the transmitted high-frequency signal_T Is also ΔF, that is, 1C
Shift by H.

The frequency F ₁ of the first local signal, the frequency F ₂ of the second local signal, and the frequency F _TIF of the transmission intermediate frequency signal are:
It can be determined by the frequency F _R of the reception high-frequency signal and the frequency F _T of the transmission high-frequency signal of the wireless system.

In the synthesizer section 100 shown in FIG.
The output of the doubler 106 is used as a local signal for reception to the first mixer 4, the output of the first bandpass filter 104 is used as a local signal for transmission to the third mixer 14, and the second bandpass filter 105 is used. Is used as the modulation local oscillation signal to the modulator 12, the output of the doubler 106 is used as the transmission local oscillation signal to the third mixer 14, and the output of the first bandpass filter 104 is converted to the first mixing signal. The output from the second band-pass filter 105 may be used as a local oscillation signal for reception to the modulator 4, and the output from the second bandpass filter 105 may be used as a local oscillation signal for modulation to the modulator 12. Further, although the first local oscillator signal from the first synthesizer unit 101 is input to the doubler 106, the second local oscillator signal from the second synthesizer unit 102 may be input.

The first synthesizer unit 1 shown in FIG.
01 first local oscillation signal or second synthesizer unit 102
From the second local oscillator signal from a system clock of another circuit part (not shown) mounted inside the synthesizer radio, for example, a circuit part which does not require the accuracy of the signal processor and the interface / user tool unit 11. Can also be output as

As described above, according to the first embodiment, the signal obtained by doubling the frequency of the first local signal from the first synthesizer section 101 or the second local signal from the second synthesizer section 102 is used. , Set as a receiving local oscillator signal or a transmitting local oscillator signal, and set a signal of an added frequency component of the frequencies of the first local oscillator signal and the second local oscillator signal as a transmitting local oscillator signal or a receiving local oscillator signal. By setting the signal of the frequency component subtracted from the frequency of the first local oscillation signal and the second local oscillation signal as the modulation local oscillation signal, two types of synthesizer sections are provided in comparison with the conventional three types of synthesizer sections. , And an effect that simplification, downsizing, low power consumption, and cost reduction of the circuit of the synthesizer section can be obtained.

Further, relatively the frequencies F ₁ of the first local oscillation signal, F ₂ of the second station oscillation signal, the frequency F _R of the receiving radio-frequency signals, with respect to the frequency F _T of the transmission high-frequency signal, compared with the conventional Since distant frequencies can be set, sensitivity degradation to the receiving system due to noise generated from the first synthesizer unit 101 and the second synthesizer unit 102 is reduced, and the transmission high-frequency signal is transmitted to the first synthesizer unit 101 and the second synthesizer unit 102. To reduce the possibility that the oscillation of the first local oscillation signal or the second local oscillation signal becomes unstable.

Furthermore, the frequencies F _R and F _{T of the} reception high-frequency signal and the transmission high-frequency signal used for mobile communication these days.
Tend to use higher frequencies, and it is difficult to achieve the performance required of the synthesizer unit. However, in this embodiment, the frequency of the first local signal or the second local signal is relatively low. Since the frequency can be set to a low frequency, the effect that the performance required for the synthesizer section can be easily realized is obtained.

Further, the first local oscillator signal output from the first synthesizer unit 101 or the second local oscillator signal output from the second synthesizer unit 102 is supplied as a system clock of a circuit unit provided therein, thereby providing an overall system. The advantage is that the general circuit configuration can be simplified.

Embodiment 2 FIG. 2 is a block diagram showing a configuration of a synthesizer radio according to Embodiment 2 of the present invention. The synthesizer radio according to the present embodiment uses a different frequency for transmission and reception in the same manner as the first embodiment, in addition to the FDD mode in which transmission and reception are separated by frequency, as well as separation between transmission and reception. (Time Division Double)
x) The mode is a dual mode wireless device that realizes the mode with one wireless device.

In FIG. 2, the reception bandpass filter 3
2, reception high frequency amplifier 33, fifth mixer 34, reception intermediate frequency band pass filter 35, reception intermediate frequency amplifier 3
6, the sixth mixer 38, the demodulator 39, the second modulator 42, the transmission intermediate frequency amplifier 43, the seventh mixer 44, the transmission high-frequency amplifier 45, and the transmission band-pass filter 46 include a TDD mode reception system and transmission system. , And a reception band-pass filter 2, a reception high-frequency amplifier 3, a first mixer 4, a reception intermediate frequency band-pass filter 5, a reception intermediate frequency amplifier 6, and a second mixing It performs operations equivalent to those of the demodulator 8, the demodulator 9, the first modulator 12, the transmission intermediate frequency amplifier 13, the third mixer 14, the transmission high frequency amplifier 15, and the transmission band pass filter 16.

In FIG. 2, reference numeral 201 denotes a VCO 21
1, a PLL 212, and a LPF 213, and is a first synthesizer unit that outputs a first local oscillation signal for generating a local oscillation signal for reception, a local oscillation signal for transmission, and a local oscillation signal for modulation in the FDD mode and the TDD mode. , 202 is the VCO 22
1, a PLL 222, and an LPF 223, and is a second synthesizer unit that outputs a second local oscillation signal for generating a local oscillation signal for reception, a local oscillation signal for transmission, and a local oscillation signal for modulation in the FDD mode and the TDD mode. .

In FIG. 2, reference numeral 203 denotes a signal obtained by mixing the first local signal from the first synthesizer section 201 and the second local signal from the second synthesizer section 202, and combining the frequency component of the first local signal with the second local signal. The fourth mixer 204 outputs the signal of the addition frequency component with the frequency component of the two-station signal and the signal of the subtraction frequency component. The fourth mixer 204 receives the signal of the addition frequency component output from the fourth mixer 203 in the TDD mode. A first band-pass filter, which is selected as a local oscillator signal and a local oscillator signal for transmission and output to the fifth mixer 34 and the seventh mixer 44;
A second band 5 selects a signal of a subtraction frequency component output from the fourth mixer 203 as a local modulation signal for modulation in the FDD mode and the TDD mode, and outputs the signal to the first modulator 12 and the second modulator 42. It is a pass filter.

Further, in FIG. 2, the synthesizer section 200 includes a first synthesizer section 201, a second synthesizer section 202, a fourth mixer 203, a first band-pass filter 204, and a second band-pass filter 205. . The other configuration is the same as the conventional configuration shown in FIG.

Next, the operation will be described. The operations of the reception system and the transmission system in the TDD mode are the same as the operations of the reception system and the transmission system of the first embodiment, and a description thereof will be omitted. here,
The operation of the synthesizer section 200 will be described. First
Synthesizer section 201 and second synthesizer section 20
The operation of No. 2 is the same as that of each of the conventional synthesizer units shown in FIG. 6, and a first local oscillator signal and a second local oscillator signal corresponding to the frequency set by the system controller 21 are output.

The first local oscillator signal from the first synthesizer 201 is output to the first mixer 4 as a local oscillator signal for reception in the FDD mode. Also, the second synthesizer section 20
The second to second local signals are output to the third mixer 14 as FDD mode transmitting local signals.

The first local signal from the first synthesizer section 201 and the second local signal from the second synthesizer section 202 are mixed by a fourth mixer 203, and the frequency of the sum and difference of their frequency components is The components are generated as a signal of an addition frequency component and a signal of a subtraction frequency component, respectively.
Among the signals of these frequency components, the signal of the added frequency component is selected by the first band-pass filter 204 as the local oscillator signal for reception and the local oscillator signal for transmission in the TDD mode, and the fifth mixer 34 and the seventh mixer The signal of the subtracted frequency component output to the mixer 44 is selected by the second band-pass filter 205 as the modulation station oscillation signal in the FDD mode and the TDD mode, and is output to the first modulator 12 and the second modulator 42. Is done. As described above, the FDD mode and the TDD
The reception channel and transmission channel of the mode are set.

Next, a description will be given of the relationship between the frequencies of the reception channel and the transmission channel. First, the case of the FDD mode will be described. The frequency of the reception high-frequency signal input from the reception high-frequency amplifier 3 to the first mixer 4 is F _R , the frequency of the reception local oscillation signal input to the first mixer 4 is F _RL , and the output from the first mixer 4 The frequency of the received first intermediate frequency signal is represented by F _RIF , and the first synthesizer section 201
The frequency of the first local oscillation signal from the F _1, the third mixer 1
The frequency of the transmission high-frequency signal output from the fourth is F _T , the third
The frequency of the transmission local oscillation signal input to the mixer 14 is F _TL , the frequency of the transmission intermediate frequency signal input to the third mixer 14 is F _TIF , and the frequency of the modulation local oscillation signal input to the modulator 12 is F _TIF . When the frequency is F _MOD , the frequency of the second local oscillation signal from the second synthesizer unit 202 is F ₂ , and the frequency channel interval is ΔF, the following relationship is obtained.

[0051] _{F R = F RIF + F RL} F T = F TIF + F TL F TIF = F MOD F RL = F 1 F TL = F 2 F MOD = | F 1 -F 2 |

From the above relationship, the set frequency interval between the first local oscillator signal and the second local oscillator signal is set to the frequency channel set interval ΔF
Then, the relationship when the channel is shifted by 1CH is as follows. F _RL = F ₁ + ΔF F _TL = F ₂ + ΔF F _MOD = | (F ₁ + ΔF) − (F ₂ + ΔF) | = | F ₁ −F ₂ | F _R = F _RIF + F _RL → F _RIF + F ₁ + ΔF = F _RIF + F _RL + ΔF = F _R + ΔF F _T = F _TIF + F _TL → F _TIF + F ₂ + ΔF = F _TIF + F _TL + ΔF = F _T + ΔF

From the above relation, the first local oscillation signal and the second
Even if the frequency setting of the two-station signal is shifted by 1CH,
Frequency F of the local oscillation signal for reception_RLAnd the frequency of the local signal for transmission
Number F _TLIs shifted by ΔF, that is, 1CH, and the modulation
Signal frequency F_MOD Does not matter if you change the channel setting
In particular, the frequency of the first local signal and the frequency of the second local signal
And the frequency F of the received high-frequency signal_R 
And the frequency F of the transmitted high-frequency signal_T Is also ΔF, that is, 1C
Shift by H.

The frequency F ₁ of the first local signal, the frequency of the second local signal F _2, and the frequency F _{TIF of the} transmission intermediate frequency signal
Can be determined by the frequency F _R of the received high-frequency signal and the frequency F _T of the transmitted high-frequency signal of the wireless system.

Next, the case of the TDD mode will be described. TD
In the case of the D mode, the frequency of the reception high-frequency signal input from the reception high-frequency amplifier 33 to the fifth
The frequency of the transmission high-frequency signal output from the mixer 44 is the same, the frequency of the reception high-frequency signal and the frequency of the transmission high-frequency signal are F ′, and the frequency of the reception first intermediate frequency signal output from the fifth mixer 34 is F _RIF ', the frequency of the transmission intermediate frequency signal input to the seventh mixer 44 is F _TIF ', the fifth
The frequency of the local oscillation signal for reception input to the mixer 34 and the frequency of the local oscillation signal for transmission input to the seventh mixer 44 are represented by F
_L , the frequency of the modulation local oscillation signal input to the second modulator 42 is F _MOD ′, the frequency of the first local oscillation signal is F ₁ , the frequency of the second local oscillation signal is F ₂ , and the frequency channel interval is 2ΔF. Then, the following relationship is obtained.

Reception: F ′ = F_RIF ’+ F_L  Transmission: F '= F_TIF ’+ F_L  F_TIF ’= F_MOD ’F_MOD ’= | F₁ -F_Two | F_L = F₁ + F_Two

From the above relationship, the set frequency interval between the first local signal and the second local signal is set to the frequency channel set interval 2Δ
Assuming that ΔF is a half of F, the relationship when the channel is shifted by 1CH is as follows. F _L = (F ₁ + ΔF) + (F ₂ + ΔF) = F ₁ + F ₂ + 2ΔF → F _L + 2ΔF F _MOD = | (F ₁ + ΔF) − (F ₂ + ΔF) | = | F ₁ -F ₂ | F '= F _RIF ' + F _L → F _RIF '+ F _L + 2ΔF = F' + 2ΔF Transmission: F '= F _TIF ' + F _L → F _TIF '+ F _L + 2ΔF = F' + 2ΔF

Thus, from the above relationship, even if the frequency setting of the first local signal and the second local signal is shifted by 1CH,
The frequency of the transmitting local oscillation signal and the frequency of the receiving local oscillation signal F
_L is shifted by 2ΔF, that is, 1CH, and the frequency F _MOD of the modulation local oscillation signal is the difference F between the frequency of the first local oscillation signal and the frequency of the second local oscillation signal regardless of the channel setting. The frequency is set as the frequency of the received high-frequency signal and the frequency of the transmitted high-frequency signal, and F ′ is also 2ΔF, that is, 1CH.
Shift by minutes.

The frequency F ₁ of the first local signal, the frequency F ₂ of the second local signal, and the frequency F _TIF of the transmission intermediate frequency signal are:
It can be determined by the frequency of the received high-frequency signal and the frequency F 'of the transmitted high-frequency signal of the wireless system.

The first synthesizer unit 2 shown in FIG.
The first local signal from the first or second synthesizer unit 20
The second to second local oscillator signals are transmitted to other circuit parts (not shown) mounted on the synthesizer radio, such as a signal processor and an interface / user tool part 1
It can also be output as a system clock for a circuit part or the like that does not require the precision of 1.

As described above, according to the second embodiment, the first local oscillation signal is set as the reception local oscillation signal in the FDD mode, and the second local oscillation signal is set as the transmission local oscillation signal in the FDD mode. The signal of the added frequency component of the frequency of the first local signal and the second local signal is set as the receiving local oscillation signal and the transmitting local signal of the TDD mode, and the first local signal and the second local signal are set. The signal of the frequency component subtracted from the frequency of the local oscillation signal is
By setting the frequency of the modulation local oscillation signal in the FDD mode and the TDD mode, the dual mode wireless device can be configured with two types of synthesizers, and the circuit of the synthesizer can be simplified and downsized. The advantage is that low power consumption and cost reduction can be realized.

The first local oscillator signal output from the first synthesizer unit 201 or the second local oscillator signal output from the second synthesizer unit 202 is supplied as a system clock of an internal circuit unit, thereby providing an overall system clock. The advantage is that the general circuit configuration can be simplified.

Embodiment 3 FIG. 3 is a diagram showing a method of using channels when the dual mode synthesizer radio of FIG. 2 according to the second embodiment is used. Dual mode synthesizer radios have FDD mode and T
Since two bands in the DD mode can be used, one user can use two bands.
Different transmission rates can be handled.

FIG. 3A is a diagram showing channel assignment. For example, in the FDD band, the transmission band per channel of channels a, b, and c is ΔF. On the other hand, in the TDD band, since the transmission band per channel can occupy 2ΔF, it is used for high-speed data communication such as image data. FIG. 3B is a diagram showing a state of a call, and the base station 51
The mobile station 52 is linked with the mobile station 52 by the channel a, the semi-stationary station 53 by the channel b, and the portable station 54 by the channel c, and simultaneously communicates in the FDD band and the TDD band.

As described above, according to the third embodiment, by selectively using the FDD band and the TDD band according to the occupied band, compared to a system in which low-speed data and high-speed data are mixed and transmitted. This leads to the simplicity of signal processing at the time of transmission and the reduction of the processing of the system, and the effect that audio data and image data can be efficiently transmitted is obtained.

Embodiment 4 FIG. 4 is a diagram showing another channel assignment in the case where the dual mode synthesizer radio of FIG. 2 according to Embodiment 2 is used.
In the TDD band, the transmission band per channel of channels a, b, and c can occupy 2ΔF, so it is used for high-speed data transfer. In the FDD band, the transmission band per channel is as narrow as ΔF. It is used for retransmission of data that has been lost due to an error during transmission that occurred in. That is, the FDD band is used as a redundant configuration channel of the TDD band.

As described above, according to the fourth embodiment, the TDD band is used for high-speed data transfer and the FDD band is selectively used for data retransmission, whereby the effect of increasing the speed of data transmission can be achieved. can get.

Embodiment 5 FIG. 5 is a diagram illustrating another channel assignment in the case where the dual-mode synthesizer radio of FIG. 2 according to the second embodiment is used.
In the TDD band, the transmission band per channel of channels a, b, and c can occupy 2ΔF, so it is used for high-speed data transfer. In the FDD band, the transmission band per channel is as narrow as ΔF. It is used as a redundant configuration channel for retransmission of lost data due to an error during transmission caused by the above, or for transmission of control data such as power control and channel assignment and monitoring data.

As described above, according to the fifth embodiment, the data transmission is performed by selectively using the TDD band for high-speed data transfer and the FDD band for data retransmission and transmission of control data and monitoring data. The effect is that the speed of the operation can be increased.

Embodiment 6 FIG. FIG. 6 is a diagram showing another channel assignment in the case where the dual mode synthesizer radio of FIG. 2 according to Embodiment 2 is used.
In the TDD band, the transmission band per channel of channels a, b, and c can occupy 2ΔF, so it is used for high-speed data transfer. In the FDD band, the transmission band per channel is as narrow as ΔF. It is used for a transmission / reception switching signal when transmitting and receiving data.

For example, in FIG.
Is transmitting data in the TDD band, FD
Unless a transmission / reception switching signal is received in the D band, data is transmitted unilaterally. However, when a transmission / reception switching signal is transmitted in the FDD band from either the mobile station 52 or the base station 51, data is transmitted in the TDD band. The mobile station 52 that has been in the transition to the reception standby state.

As described above, according to the sixth embodiment, by selectively using the TDD band for high-speed data transfer and the FDD band for transmission / reception switching signals,
The effect is that the efficiency of data transmission, particularly the efficiency of file download and upload, can be improved.

[0073]

As described above, according to the present invention, the first synthesizer section for outputting the first local signal corresponding to the frequency channel and the second synthesizer for outputting the second local signal corresponding to the frequency channel are provided. A synthesizer section, a doubler for doubling the frequency of the first local oscillation signal and outputting it as a receiving local oscillation signal to the first mixer, and a fourth mixer for mixing the first local oscillation signal and the second local oscillation signal And the first local signal from the fourth mixer and the second
A first band-pass filter that selects a signal of an added frequency component of the local oscillation signal and outputs the signal as a transmission local oscillation signal to the third mixer; and a first mixer and a second local oscillation signal from the fourth mixer. A second bandpass filter that selects a signal of the subtraction frequency component and outputs the signal as a modulation local oscillation signal to the second mixer, thereby simplifying the circuit of the synthesizer unit, reducing the size, reducing the power consumption, There is an effect that the cost can be reduced.

According to the present invention, the first synthesizer section for outputting the first local oscillation signal corresponding to the frequency channel,
A second output of a second local oscillation signal corresponding to the frequency channel
A synthesizer section, a doubler for doubling the frequency of the first local oscillation signal and outputting it to the third mixer as a transmission local oscillation signal, and a fourth mixer for mixing the first local oscillation signal and the second local oscillation signal And a signal of an added frequency component of the first local oscillator signal and the second local oscillator signal from the fourth mixer, and the first local oscillator signal as the receiving local oscillator signal.
A first band-pass filter to be output to the mixer; and a signal of a subtracted frequency component of the first local signal and the second local signal from the fourth mixer, which is output to the second mixer as a modulation local signal. By providing the second band-pass filter, there is an effect that simplification, downsizing, low power consumption, and cost reduction of the circuit of the synthesizer section can be realized.

According to the present invention, the first local oscillator signal corresponding to the frequency channel is output, and
A first synthesizer section for outputting to the first mixer as a local mode signal for reception in the DD mode, a second local mode signal corresponding to the frequency channel, and an FDD for the second local mode signal
A second synthesizer section for outputting a mode local transmission signal to the third mixer, a fourth mixer for mixing the first local signal and the second local signal, and a first station transmission from the fourth mixer. Signal and the signal of the added frequency component of the second local oscillator signal, and TDD
A first band-pass filter that outputs to the fifth mixer as a local transmission signal for reception in the TDD mode and also outputs to the seventh mixer as a local transmission signal for transmission in the TDD mode; And a signal of a subtracted frequency component of the second local oscillation signal and outputs it to the first modulator as a modulation local oscillation signal in the FDD mode and outputs it to the second modulator as a modulation local oscillation signal in the TDD mode. With the provision of the second bandpass filter, even in a dual mode radio,
The configuration can be made with two types of synthesizer sections, and the circuit of the synthesizer section can be simplified, downsized, and reduced in power consumption.
There is an effect that the cost can be reduced.

According to the present invention, by using the transmission / reception system in the TDD mode for high-speed data communication such as image data and the transmission / reception system in the FDD mode for low-speed data communication such as voice data, signal processing during transmission is achieved. This leads to the simplicity of the operation and the reduction of the processing of the system, and the high-speed data and the low-speed data can be transmitted efficiently.

According to the present invention, the transmission / reception system in the TDD mode is used for high-speed data communication, and the transmission / reception system in the FDD mode is used for data retransmission when an error occurs in the high-speed data communication. This has the effect of speeding up the operation.

According to the present invention, the transmission / reception system in the TDD mode is used for high-speed data communication, and the transmission / reception system in the FDD mode is used for communication of control data and monitoring data, thereby increasing the speed of data transmission. There is an effect that can be.

According to the present invention, the transmission / reception system in the TDD mode is used for high-speed data communication, and the transmission / reception system in the FDD mode is used for communication of a transmission / reception switching signal of the transmission / reception system in the TDD mode. There is an effect that it can be achieved.

According to the present invention, the first local oscillator signal output from the first synthesizer unit or the second local oscillator signal output from the second synthesizer unit is supplied as a system clock of a circuit unit existing inside. This has the effect of simplifying the overall circuit configuration.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a synthesizer wireless device according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a synthesizer wireless device according to a second embodiment of the present invention.

FIG. 3 is a diagram illustrating a method of using a channel according to a third embodiment of the present invention.

FIG. 4 is a diagram showing channel assignment according to Embodiment 4 of the present invention.

FIG. 5 is a diagram showing channel assignment according to Embodiment 5 of the present invention.

FIG. 6 is a diagram illustrating channel assignment according to a sixth embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a conventional synthesizer radio.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 antenna, 2 reception band-pass filter, 3 reception high-frequency amplifier, 4 first mixer, 5 reception intermediate frequency band-pass filter, 6 reception intermediate frequency amplifier, 7 local oscillator, 8 second mixer, 9 demodulator, 10 signals Processing unit,
Reference Signs List 11 interface / user tool part, 12 (first) modulator, 13 transmission intermediate frequency amplifier, 14 third mixer, 15 transmission high frequency amplifier, 16 transmission bandpass filter, 21 system controller, 22 reference oscillator, 32 reception bandpass Filter, 33 reception high-frequency amplifier, 34 fifth mixer, 35 reception intermediate frequency band-pass filter, 36 reception intermediate frequency amplifier, 38 sixth mixer, 39 demodulator, 42 second modulator, 43 transmission intermediate frequency amplifier, 44 Seventh mixer, 45 transmitting high-frequency amplifier, 46 transmitting band-pass filter, 51 base station, 52 mobile station, 53 semi-stationary station, 54 portable station, 1
00, 200 synthesizer section, 101, 201 first synthesizer section, 102, 202 second synthesizer section, 103, 203 fourth mixer, 104, 204
1st bandpass filter, 105,205 2nd bandpass filter, 106 doubler, 111,121,
211, 221 VCO, 112, 122, 212, 2
22 PLL, 113, 123, 213, 223 LP
F.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04B 1/54 H04B 1/54 H04J 1/04 H04J 1/04 H04L 5/16 H04L 5/16 F term ( Reference) 5K011 BA02 DA04 DA07 DA27 JA01 KA02 5K018 AA04 BA02 CA02 FA01 FA05 5K020 DD12 FF04 GG02 GG04 GG12 HH13 5K022 AA03 AA23 AA24 AA42 5K060 CC12 HH11 HH14 HH22 HH26

Claims (8)

[Claims] 1. A received high-frequency signal is converted into a first received intermediate frequency signal by a first mixer, and the first received intermediate frequency signal is converted into a second received intermediate frequency signal by a second mixer and demodulated. A synthesizer radio that converts the transmission signal to a transmission intermediate frequency signal by a modulator, converts the transmission intermediate frequency signal to a transmission high frequency signal by a third mixer, and transmits the signal. The first which outputs the emission signal
A synthesizer unit, a second synthesizer unit that outputs a second local oscillator signal corresponding to the frequency channel, and a frequency of the first local oscillator signal that is doubled and output to the first mixer as a local oscillator signal for reception. A doubler, a fourth mixer for mixing the first local signal and the second local signal, and an additional frequency component of the first local signal and the second local signal from the fourth mixer And a first band-pass filter for outputting the signal as a local signal for transmission to the third mixer, and a subtraction frequency component of the first local signal and the second local signal from the fourth mixer. And a second band-pass filter for selecting the signal of (i) and outputting as a modulation local oscillation signal to the second mixer. 2. A received high frequency signal is converted into a first received intermediate frequency signal by a first mixer, and the first received intermediate frequency signal is converted into a second received intermediate frequency signal by a second mixer and demodulated. A synthesizer radio that converts the transmission signal to a transmission intermediate frequency signal by a modulator, converts the transmission intermediate frequency signal to a transmission high frequency signal by a third mixer, and transmits the signal. The first which outputs the emission signal
A synthesizer section, a second synthesizer section that outputs a second local oscillation signal corresponding to the frequency channel, and a frequency of the first local oscillation signal that is doubled and output to the third mixer as a transmission local oscillation signal. A doubler, a fourth mixer for mixing the first local signal and the second local signal, and an additional frequency component of the first local signal and the second local signal from the fourth mixer And a first band-pass filter for outputting to the first mixer as a reception local oscillation signal, and a subtraction frequency component of the first local oscillation signal and the second local oscillation signal from the fourth mixer. And a second band-pass filter for selecting the signal of (i) and outputting as a modulation local oscillation signal to the second mixer. 3. The received received high-frequency signal is converted into a received first intermediate frequency signal by a first mixer, and the received first intermediate frequency signal is converted into a received second intermediate frequency signal by a second mixer and demodulated. At the same time, the transmission signal is converted into a transmission intermediate frequency signal by the first modulator, and the transmission intermediate frequency signal is
FDD which converts to high frequency signal for transmission by mixer and transmits
(Frequency Division Double
x) mode transmission / reception system, and the received high frequency signal received is converted into a first received intermediate frequency signal by a fifth mixer, and the received first intermediate frequency signal is converted to a sixth received frequency signal by a sixth mixer.
The mixer converts the signal into a reception second intermediate frequency signal and demodulates the signal. The transmission signal is converted into a transmission intermediate frequency signal by a second modulator, and the transmission intermediate frequency signal is converted into a transmission high frequency signal by a seventh mixer. TDD (Time D)
In a synthesizer radio having a transmission / reception system of an I / O (duplex) mode, a first local oscillator signal corresponding to a frequency channel is output, and the first local oscillator signal is used as the FDD mode receiving local oscillator signal. A first synthesizer for outputting to the first mixer, a second local oscillator corresponding to the frequency channel, and the second local oscillator as the local oscillator for transmission in the FDD mode. A second synthesizer section that outputs the first local signal and the second local signal; a fourth mixer that mixes the first local signal and the second local signal; and a first local signal and a second local signal from the fourth mixer. And outputs it to the fifth mixer as the local oscillator signal for reception in the TDD mode, and outputs the signal as the local oscillator signal for transmission in the TDD mode.
A first band-pass filter to be output to a mixer; and a signal of a frequency component subtracted from the first local signal and the second local signal from the fourth mixer, and a modulation local signal in the FDD mode. To the first modulator, and as the TDD mode modulation local oscillation signal,
A synthesizer radio, comprising: a second bandpass filter that outputs to a modulator. 4. The synthesizer radio according to claim 3, wherein the transmission / reception system in the TDD mode is used for high-speed data communication such as image data, and the transmission / reception system in the FDD mode is used for low-speed data communication such as voice data. Machine. 5. The transmission / reception system in a TDD mode is used for high-speed data communication, and the transmission / reception system in an FDD mode is used for data retransmission when an error occurs in the high-speed data communication. Synthesizer radio. 6. The synthesizer radio according to claim 3, wherein a transmission / reception system in the TDD mode is used for high-speed data communication, and a transmission / reception system in the FDD mode is used for communication of control data and monitoring data. 7. The transmission / reception system according to claim 3, wherein a transmission / reception system in the TDD mode is used for high-speed data communication, and a transmission / reception system in the FDD mode is used for communication of a transmission / reception switching signal of the transmission / reception system in the TDD mode. Synthesizer radio. 8. The system according to claim 1, wherein the first local oscillator signal output from the first synthesizer unit or the second local oscillator signal output from the second synthesizer unit is supplied as a system clock of a circuit unit existing therein. The synthesizer radio according to any one of claims 1 to 3.