WO2006085511A1 - Pulse modulating wireless communication apparatus - Google Patents

Abstract

A transmitting section is provided with a clock generating section (101) which generates a clock signal for indicating each frame timing; a first transmission RF section (110) which generates a clock RF signal by RF modulating a pulse signal generated in a timing of the clock signal and transmits the clock RF signal to a synchronization signal channel; a transmission data generating section (103) which generates transmission data in synchronous with timing of the clock signal; a PPM section (104) which performs PPM to the transmission data and outputs a PPM signal; and a second transmission RF section (107), which generates a data RF signal by RF modulating the PPM signal and outputs the data RF signal to a data signal channel which is a signal channel different from the synchronization signal channel. The receiving section receives reference synchronization information of PPM as needed and maintains a status wherein data reception phase is synchronized.

Description

 Specification

 Pulse modulation wireless communication device

 Technical field

 The present invention relates to a pulse modulation wireless communication apparatus using a pulse modulation signal.

 Background art

 [0002] With the spread of wireless LANs (Local Area Networks) in recent years, the use by portable terminals taking advantage of the wireless advantage of mobility is increasing. In such portable terminals, (1) downsizing and weight reduction of equipment, (2) battery life extension (reduction of power consumption) is emphasized, and (3) high speed communication speed is required. ing.

 [0003] Ultra Wide Band (UWB) technology is (1) suitable for CMOS since it does not necessarily require linearity by using an impulse communication method, and can be miniaturized, (2) High precision local Because it is a wireless communication technology that has the advantage of low power consumption because it does not require an RF circuit such as a signal source, and (3) high-speed communication is possible by using a wide band, it is suitable for the above LAN applications. It attracts attention in recent years.

 Conventionally, in a pulse modulation wireless communication apparatus using a pulse modulation signal, the low frequency component of the received signal is extracted, the pulse is detected while the frequency of the generated clock signal is adjusted, and the received signal is demodulated. (For example, JP-A-10-508725).

 The prior art will be described below with reference to the drawings.

 FIG. 13 is a block diagram showing a configuration of a reception unit of a pulse modulation wireless communication apparatus using a pulse modulation signal called conventional UWB.

As shown in FIG. 13, PPM (Pulse Position Modulation) is used as a modulation method.

The conventional example of the method will be described.

In FIG. 13, the receiver 1300 of the conventional pulse modulation wireless communication apparatus has an antenna 130.

1, 3⁄4 ffRF 3⁄41 302, 関 304 1304, Nores ^ ^ 1305, P ー ノ ス イ ノ 307 1307, adjustable time base 1309, pulse timing generator 1311, spread code sequence generator 131

2 and a demodulation unit 1316.

In this configuration, the signal received by antenna 1301 is amplified by reception RF section 1302. The received signal 1303 is generated by widening or removing an unnecessary signal.

[0010] A correlation signal 1306 is generated by detecting the correlativity between 3⁄4 | 3⁄4 3 1 4 3⁄4 «, 言 f 号 1 130 3 and the no ls 1315 produced by the no ls ^ 1 305.

The low pass filter 1307 extracts the low frequency component signal 1308 from the correlation signal 1306.

An adjustable time base 1309, which is a variable frequency clock transmitting means, monitors the low frequency component signal 1308 and adjusts the frequency of the generated clock 1310 so that the signal becomes maximum.

 Here, in the technology described in JP-A-10-508725, a frequency spreading technology is applied to spreading code sequence generation section 1312 to identify a device not to be communicated, and a pulse timing generation section 1311 adds a delay corresponding to the spread code sequence signal 1313 in the spread code sequence generation unit 1312 to the clock signal 1310 and supplies a pulse generation timing signal 1314 to the pulse generation unit 1305.

 Thus, in the conventional pulse modulation wireless communication apparatus, when the spread sequence signal 1313 generated by the spread code sequence generation unit 1312 matches the spread sequence signal of the transmission source, the correlation unit 1304 detects the pulse. Despreading processing is performed, and a demodulation unit 1316 converts the data into a baseband signal sequence, and demodulates the transmitted data.

 [0015] Meanwhile, in the conventional pulse modulation wireless communication apparatus, in order to reproduce the synchronization signal from the modulation wave with high accuracy, for example, the overhead system has information at the time position of the pulse. The pulse trains obtained as received signals are not equally spaced, and it is necessary to simultaneously detect deviations in pulse positions, which causes a problem that the synchronous circuit has a complicated configuration.

 Also, for example, in the multi-value ΡΡΜ method, there is a problem that a synchronous circuit that detects the temporal position of the pulse with high accuracy is required, and the configuration becomes more complicated.

 In addition, in the method of providing a preamble portion of pulse trains with equal intervals in the transmission signal to start frame synchronization when starting demodulation processing after receiving a signal, the preamble portion contains information. As a result, there is a problem that the transmission rate of information is substantially reduced by the insertion of the preamble part.

Also, since synchronization processing is performed intermittently only in the preamble part, multipath When the preamble section is affected by unnecessary interference waves such as radio waves from other devices or radio waves from other devices, there is a problem that synchronization timing is erroneous and reception performance is significantly degraded.

 Disclosure of the invention

 The present invention solves such a problem, and the receiver appropriately receives pulse modulation reference synchronization information to maintain, for example, a synchronized pulse position, and a data signal. After receiving, the demodulation circuit can start demodulation immediately, and receives the pulse-modulated data signal. The synchronization circuit provides a pulse-modulated wireless communication device with a simple configuration.

 The present invention also provides, for example, a pulse modulation wireless communication apparatus capable of receiving a data signal modulated by a multi-level pulse modulation method with a simple configuration of a synchronization circuit.

 The present invention also provides a pulse modulation wireless communication device with a highly reliable configuration for detecting an error in a data signal.

Another object of the present invention is to provide a pulse-modulated wireless communication device having a configuration in which a highly accurate synchronization circuit is not required after synchronization channel synchronization pull-in, and the communication efficiency of the synchronization channel signal is high.

 The present invention also provides a pulse modulation wireless communication device having a configuration with high utilization efficiency of a synchronization channel signal even when data communication is simultaneously performed with a plurality of pulse modulation wireless communication devices.

In the pulse modulation wireless communication apparatus of the present invention, a clock generation unit that generates a clock signal indicating each frame timing of a transmission signal, a first pulse generation unit that generates a pulse signal at the timing of the clock signal, The first transmission conversion unit generates a clock conversion signal by converting the pulse signal generated by the first pulse generation unit and generates a clock conversion signal, and generates transmission data in synchronization with the timing of the clock signal. A transmission data generation unit, a pulse modulation unit that pulse-modulates transmission data and outputs a pulse generation timing signal, a second pulse generation unit that generates a pulse signal at the timing of the pulse generation timing signal, The pulse signal generated by the pulse generation unit 2 is converted to generate a data conversion signal, and the data signal is a signal channel different from the synchronization signal channel. It has a configuration in which a second transmission converter unit that outputs to the signal channels, Ru. Further, in the pulse modulation wireless communication apparatus of the present invention, a first reception conversion unit that receives a clock conversion signal obtained by converting a clock pulse signal from a synchronization signal channel and generates a clock pulse signal, and a data pulse signal The data conversion signal obtained by converting the data is received from the data signal channel which is a signal channel different from the synchronization signal channel, and a second reception conversion unit that generates a data pulse signal, and pulse demodulation of the data pulse signal based on the clock pulse signal And a pulse demodulation unit that outputs a bit stream, and a demodulation unit that demodulates the bit stream into received data with reference to the clock pulse signal.

Further, in the pulse modulation wireless communication apparatus of the present invention, the pulse modulation unit sets a modulation pulse position indicating a pulse position of pulse modulation according to transmission data, and a pulse control signal corresponding to the modulation pulse position. A pulse position setting unit that outputs the signal, a multistage delay unit that taps and outputs a clock signal delayed according to all pulse modulation pulse positions, and an output signal of the multistage delay unit is selected by the pulse control signal and output. And a switch portion to be connected.

 Further, in the pulse modulation wireless communication apparatus of the present invention, the pulse demodulation unit outputs a multistage delay unit for outputting clock pulse signals delayed according to pulse positions of all pulse modulations, and an output of the multistage delay unit. The configuration includes a correlation unit that detects a correlation between a signal and a data pulse signal and outputs a correlation signal, and a pulse position determination unit that determines a pulse position of pulse modulation according to the correlation signal and outputs a bit stream. Have.

 The pulse-modulated wireless communication device of the present invention further includes a synchronization generation unit that generates a synchronization pulse signal that is a pulse signal of a fixed cycle according to a clock signal, and the first pulse generation unit The pulse signal is generated at the timing of the pulse signal.

 The pulse-modulated wireless communication device of the present invention further includes a clock recovery unit that generates a recovered clock signal indicating frame timing from a clock pulse signal of a fixed cycle, and the pulse demodulation unit is based on the recovered clock signal. The data pulse signal is pulse-demodulated to output a bit stream, and the demodulator demodulates the bit stream into received data based on the reproduction clock signal.

Further, in the pulse modulation wireless communication apparatus of the present invention, the clock recovery unit operates at a frequency approximating the previously set frame timing, and frequency control is performed by an external voltage. A clock signal source, a phase comparison unit that outputs an error amount indicating the phase difference between the clock signal source and the clock pulse signal, and a low pass filter that converts the error amount into a control voltage and outputs the control signal. The frequency is controlled by the control voltage.

 Further, in the pulse modulation wireless communication apparatus of the present invention, the clock recovery unit operates at a frequency approximate to the frame timing set in advance, and the phase of the output signal is returned to the initial phase by the external signal. The clock recovery signal generation unit capable of reset control is provided, and the phase of the recovery clock signal is synchronized by the input of the clock pulse signal.

 Further, in the pulse modulation wireless communication apparatus of the present invention, the pulse modulation wireless communication apparatus comprises a pulse signal having a predetermined cycle according to a clock signal and a pulse signal in which incidental information data indicating incidental information of transmission data is superimposed on the clock signal. The transmission data generation unit generates additional information data together with the transmission data in synchronization with the timing of the clock signal, and the first pulse generation unit generates a superposition pulse. It has a configuration that generates a pulse signal at the timing of the signal.

 In addition, in the pulse modulation radio communication device of the present invention, a clock pulse signal on which pulse signals of a constant cycle and incidental information data indicating incidental information of transmission data are superimposed is used to reproduce a reproduced clock signal indicating every frame timing. And a superimposed data decoding unit for extracting superimposed data according to the reproduced clock signal and generating superimposed data by the superimposed clock pulse signal according to the reproduced clock signal. As a reference, the superimposed data and the bit stream are demodulated into received data.

 Further, in the pulse modulation wireless communication apparatus of the present invention, a random number pulse signal generated by pulse modulating a clock signal according to pseudo random number sequence data and a pseudo random number generation unit generating pseudo random number sequence data according to a clock signal. The first pulse generation unit is configured to generate a pulse signal at the timing of the random number pulse signal.

Further, in the pulse modulation wireless communication apparatus of the present invention, a clock pulse demodulation unit for generating a random number reproduction clock signal indicating each frame timing from a clock pulse signal pulse-modulated according to pseudo random number sequence data; And a pseudo random number generation unit for generating pseudo random number sequence data at the timing of the clock signal. The data pulse signal is pulse-demodulated based on the clock signal to output a bit stream, and the demodulator is configured to demodulate the bit stream into received data based on the random number recovery clock signal.

 Further, in the pulse modulation wireless communication apparatus of the present invention, a pseudo random number generation unit that generates pseudo random number sequence data according to a clock signal, and bi-phase clock signal according to the pseudo random number sequence data (Bi-Phase) The first pulse generation unit further has a configuration for generating a pulse signal at the timing of the random pulse signal! // A bias modulation unit for generating a modulated (binary phase modulated) random number pulse signal! .

 In addition, in the pulse modulation radio communication device of the present invention, a biphase reproduction clock indicating each frame timing by detecting a repetition frequency of biphase modulation from a clock pulse signal modulated by a phase shift according to pseudo random number sequence data. The device further includes a pulse detection unit that generates a signal, and the pulse demodulation unit pulse-demodulates the data pulse signal based on the biphase reproduction clock signal to output a bit stream, and the demodulation unit generates the bit stream based on the biphase reproduction clock signal. It is configured to demodulate a bit stream into received data.

 Furthermore, in the pulse modulation wireless communication apparatus of the present invention, a plurality of transmission data generation units, a pulse modulation unit, a second pulse generation unit, and a second transmission conversion unit are provided, and a plurality of communication destinations are provided. Is modulated to synchronize the timings of clock signals to generate a data conversion signal, and the data conversion signal is sent to a data signal channel set for each communication destination.

 Further, in the pulse modulation wireless communication apparatus of the present invention, the second reception conversion unit selectively receives a plurality of data signal channel powers set in advance, and generates a data pulse signal. Have a configuration!

 Further, in the pulse modulation wireless communication apparatus of the present invention, the pulse modulation unit or the pulse demodulation unit is a pulse amplitude modulation method of modulating the amplitude of the pulse, or a pulse phase modulation method of modulating the phase of the pulse, or The pulse frequency modulation scheme that modulates the frequency of is composed of.

Further, in the pulse modulation wireless communication apparatus of the present invention, the frequency band used by the synchronization signal channel is narrower than the frequency band used by the data signal channel. With the above configuration, according to the present invention, the receiving unit appropriately receives the reference synchronization information of PPM modulation to maintain the synchronized state of the pulse position, and the speed or power after receiving the data signal. It is possible to demodulate the signal, and realize a pulse modulation wireless communication device with a simple configuration, with a synchronization circuit that receives a PPM modulated data signal.

 According to the present invention, even in the case of a data signal modulated by the multi-level PPM method, the synchronization pulse train is transmitted for each fixed symbol, and the clock pulse is reproduced on the reception side, whereby the synchronization circuit is realized. Can realize a pulse modulation wireless communication apparatus that can receive signals with a simple configuration.

 According to the present invention, an error of the data signal can be reduced by transmitting the synchronization pulse train for each fixed symbol and adding additional information such as the noise 'bit of the data signal to the synchronization signal. A highly reliable pulse modulation wireless communication device capable of detection and error correction can be realized.

 According to the present invention, the synchronization signal modulated by the random pattern is also sent to the synchronization channel, and the frequency spectrum of the RF signal is leveled by reproducing the synchronization signal by the same random pattern on the receiving side. After the synchronization channel is pulled in, it is possible to realize a pulse modulation wireless communication device that does not require a high-accuracy synchronization circuit and has a high communication efficiency of the synchronization channel signal.

 According to the present invention, it is also possible to detect the basic pulse interval of the bias modulation by envelope detection or the like on the receiving side by using the noise phase modulation method, and a simpler configuration can be obtained. A pulse modulation wireless communication apparatus can be realized.

 According to the present invention, when data communication is simultaneously performed with a plurality of pulse modulation wireless communication devices, the synchronization channel is shared for a plurality of transmission channels, so that the synchronous channel signal utilization efficiency is high. It is possible to realize the pulse modulation wireless communication device of the configuration.

 According to the present invention, it is also possible to narrow the total frequency band of the synchronization signal channel and the data signal channel, and to improve the communication efficiency per frequency. Brief description of the drawings

 [Figure la] Figure la is a block diagram showing a configuration of a transmission unit of the pulse modulation wireless communication apparatus according to Embodiment 1 of the present invention.

[Figure lb] Figure lb is the receiving part of the pulse modulation wireless communication apparatus according to the first embodiment of the present invention FIG. 7 is a block diagram showing the configuration of FIG.

 [FIG. 2a] FIG. 2a is a block diagram showing a configuration example of a PPM modulation unit of the pulse modulation wireless communication apparatus according to the first embodiment of the present invention.

 [FIG. 2b] FIG. 2b is a diagram showing a structural example of a mapping table stored in a pulse position setting unit of the PPM modulation unit according to the first embodiment of the present invention.

 [FIG. 3a] FIG. 3a is a block diagram showing a configuration example of a PPM demodulator of the pulse modulation wireless communication apparatus according to the first embodiment of the present invention.

 [FIG. 3b] FIG. 3b is a diagram showing signal waveforms in the vicinity of the PPM demodulation unit according to the first embodiment of the present invention.

 [FIG. 4a] FIG. 4a is a block diagram showing the configuration of a transmitter unit of a pulse modulation wireless communication apparatus according to a second embodiment of the present invention.

[4b] FIG. 4b is a block diagram showing a configuration of a reception unit of a pulse modulation wireless communication apparatus according to a second embodiment of the present invention.

 [FIG. 5a] FIG. 5a is a block diagram showing a configuration example of a clock regeneration unit of a pulse modulation wireless communication apparatus according to a second embodiment of the present invention.

 [FIG. 5b] FIG. 5b is a block diagram showing another configuration example of the clock regeneration unit of the pulse modulation wireless communication device according to the second embodiment of the present invention.

 [FIG. 6a] FIG. 6a is a block diagram showing a configuration of a transmitter unit of a pulse modulation wireless communication apparatus according to a third embodiment of the present invention.

6 b] FIG. 6 b is a block diagram showing a configuration of a reception unit of a pulse modulation wireless communication apparatus according to a third embodiment of the present invention.

 [FIG. 7a] FIG. 7a is a block diagram showing a configuration of a transmitter unit of a pulse modulation wireless communication apparatus according to a fourth embodiment of the present invention.

7 b] FIG. 7 b is a block diagram showing a configuration of a reception unit of a pulse modulation wireless communication apparatus according to a fourth embodiment of the present invention.

 [FIG. 8a] FIG. 8a is a block diagram showing the configuration of a transmission unit in the case of using a biphase modulation method for the modulation unit of a pulse modulation wireless communication apparatus according to a fifth embodiment of the present invention.

[FIG. 8b] FIG. 8b is a modulation section of a pulse modulation wireless communication apparatus according to a fifth embodiment of the present invention. Is a block diagram showing the configuration of the receiver when using the biphase modulation scheme.

[FIG. 9a] FIG. 9a is a block diagram showing a configuration of a transmitter unit of a pulse modulation wireless communication apparatus according to a sixth embodiment of the present invention.

 [FIG. 9b] FIG. 9b is a block diagram showing a configuration of a receiving unit of the first pulse modulation wireless communication apparatus according to the sixth embodiment of the present invention.

 [FIG. 9c] FIG. 9c is a block diagram showing a configuration of a receiver of a second pulse modulation wireless communication apparatus according to a sixth embodiment of the present invention.

10a] FIG. 10a is a block diagram showing a configuration of an example of a transmission unit of a pulse modulation wireless communication apparatus according to a seventh embodiment of the present invention.

10b] FIG. 10b is a block diagram showing another example of the configuration of the transmitter unit of the pulse-modulated wireless communication apparatus according to the seventh embodiment of the present invention.

 [FIG. 11a] FIG. 11a is a block diagram showing an example of a configuration of a reception unit of a pulse modulation wireless communication apparatus according to a seventh embodiment of the present invention.

FIG. 11 is a block diagram showing another example of the configuration of the reception section of the pulse modulation wireless communication apparatus according to the seventh embodiment of the present invention.

 [FIG. 12a] FIG. 12a is a diagram showing a received signal waveform received by an antenna of a pulse modulation wireless communication apparatus according to a seventh embodiment of the present invention.

 [FIG. 12b] FIG. 12b is an enlarged view of a main part of a received signal waveform received by an antenna of a pulse modulation wireless communication apparatus according to a seventh embodiment of the present invention.

[FIG. 12c] FIG. 12c is a diagram showing an output signal waveform of the band limiting filter of the pulse modulation wireless communication device according to the seventh embodiment of the present invention.

 [FIG. 12d] FIG. 12d is an enlarged view of a main portion of an output signal waveform of a band limiting filter of a pulse modulation wireless communication apparatus according to a seventh embodiment of the present invention.

 [FIG. 13] FIG. 13 is a block diagram showing a configuration of a reception unit of a conventional pulse modulation wireless communication apparatus.

Explanation of sign

 100a, 200a, 300a, 400a, 500a, 600a transmitter

100b, 200b, 300b, 400b, 500b, 600b, 600c Receiver 101 Clock Rise

102 clock signal

 103, 903 Transmission data generator

 104, 904 PPM modulator

 105 pulse generation timing signal

 106, 109, 906 pulse generator

 107, 110, 907, 1001 Transmission RF unit

 108, 111, 121, 124, 908, 921, 924, 1005, 1105 Antenna 112 Transmission data

 113, 114, 1002, 1104 no signal

 122, 125, 922, 925, 1101, 1106 Reception RF unit

 123 clock noise signal

 126 data pulse signal

 127, 927 PPM demodulator

 128 bit stream

 129, 929 demodulator

 201 Pulse position setting unit

 312 Pulse position determination unit

 401 Synchronization generator

 402, 402b Clock Recovery Unit

 403 sync pulse signal

 404 recovered clock signal

 405 Synchronization request signal

 601 Superimposed Data Generator

 602 Superimposed data decoder

 603 incidental information data

 604 Superimposed pulse signal

605 superimposed data 701, 703 Pseudo-random number generator

 702 clock PPM modulation light

 704 clock PPM demodulation 咅

 705, 707 Pseudo random number sequence data

 801 Bi-phase modulator

 802 Nose detection system

 803 Random pulse signal

 804 Bi-phase recovered clock signal

 A clock RF signal

 B, C data RF signal

 1003, 1102 RF signal source

 1004, 1006a, 1006b short pulse circuit

 Pulse signal based on 1007 clock signal

 1008 Pulse signal based on transmission data

 1103 Down Mixer

 1107 Band-limiting filter

 BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, a pulse modulation wireless communication apparatus according to an embodiment of the present invention will be described with reference to the drawings.

 Embodiment 1

 The pulse modulation radio communication apparatus according to the first embodiment of the present invention performs four-valued PPM modulation on transmission data and sends out a data RF signal (data conversion signal) to a data signal channel, as well as a data signal channel. Transmits a clock RF signal (clock conversion signal) on a different synchronization signal channel, receives a data RF signal from the data signal channel, and receives a clock RF signal on a synchronization signal channel different from the data signal channel, Four-level PPM demodulation and data are demodulated and regenerated for communication.

In the 4-value PPM modulation configuration, the transmission signal is a 4-state signal, and an impulse is generated in which the delay amount in a frame is changed to 0 seconds or T seconds. And clock signal input Power Modulates two bits of transmit data at one time per clock. T seconds is a shift value in PPM modulation, and is generally set to a time shorter than the clock signal interval.

 The configuration of a pulse modulation wireless communication apparatus according to the present embodiment will be described.

FIG. La is a block diagram showing a configuration of a transmitter of the pulse modulation wireless communication apparatus according to the first embodiment.

 In FIG. La, the transmitting unit 100a is connected to the antennas 108 and 111, and transmits at an interval of the clock signal 102 with the clock generating unit 101 generating the clock signal 102 at a constant interval of the signal transmission frame rate. The transmission data generation unit 103 generates data 112, and the PPM modulation unit 104 generates a pulse generation timing signal 105 in which the delay amount of the clock signal 102 is changed according to the transmission data.

 Furthermore, transmitter 100 a processes pulse generator 113 generating pulse signal 113 at the generation timing of clock signal 102 and RF (Radio Frequency) such as amplification of pulse signal 113, and generates a clock conversion signal. Clock RF signal A that is transmitted from the antenna 111 as the RF signal A, a pulse generator 106 that generates the pulse signal 114 according to the generation timing of the pulse generation timing signal 105, and RF processing such as amplification of the pulse signal 114 And a transmission RF unit 107 to be transmitted from the antenna 108 as a data RF signal B as a data conversion signal.

 FIG. 1 b is a block diagram showing the configuration of the receiving unit of the pulse modulation wireless communication apparatus according to the first embodiment.

 The receiving unit 100 b is connected to the antennas 121 and 124, and the receiving RF unit 122 obtains the clock pulse signal 123 by removing unnecessary frequency components from the clock RF signal A received by the antenna 121. The data RF signal B received by the antenna 124 is also composed of the reception RF unit 125 which removes unnecessary frequency components and obtains the data pulse signal 126.

Furthermore, the receiving unit 100b detects the position in the frame of the data pulse signal 126 based on the clock pulse signal 123, performs PPM demodulation, and outputs a bit stream 128; And a demodulation unit 129 that demodulates the data transmitted from 128. FIG. 2a is a block diagram showing an example of configuration of a PPM modulation unit of the pulse modulation wireless communication apparatus according to the first embodiment.

 In FIG. 2A, PPM modulation section 104 detects the start timing of a frame from clock signal 102, and control signals 202, 203, 204 indicating the pulse position in the frame according to input transmission data 112. , 205, and delay elements 206, 207, and 208 for delaying the respective input signals by time T and outputting them, and switching the energized state according to the control signals 202, 203, 204, and 205. 1 ”consists of switches 209, 210, 211 and 212.

 FIG. 2 b is a diagram showing an example of structure of a mapping table stored in a pulse position setting unit of the PPM modulation unit of the pulse modulation wireless communication apparatus according to the first embodiment.

 In FIG. 2 b, mapping table 250 includes input four-value input data, pulse position data indicating the position at which a pulse is generated, and pulse position setting output data indicating the type of control signal to be output. It is composed and beats.

 When transmission data 112 is input to pulse position setting section 201, PPM modulation section 104 stores it in advance, determines the pulse position with reference to mapping table 250, and determines the pulse position. One of the control signals 202, 203, 204, 205 is output as the setting output.

 For example, when transmission data “01” is input to pulse position setting unit 201, a pulse of pulse position “frame start position + T” is generated, and “control signal 203” is output as a pulse position setting output. Output Then, only the control switch 210 is energized, and the clock signal 102 delayed further from the "frame start position + Τ", that is, the pulse generation timing signal 105 for generating a pulse at the "frame start position + 2 Τ" Output.

 [0067] FIG. 3a is a block diagram showing an example of configuration of a PPM demodulation unit of the pulse modulation wireless communication apparatus according to the first embodiment.

In FIG. 3a, PPM demodulator 127 is a delay element 301, 302, 303 for delaying each input signal by time T, and mixers 304, 305, 306, 307 as a correlator for multiplying two input signals. And the pulse position determination unit 312 that latches and outputs the data mapped by the input signals 308, 309, 310, and 311 in the cycle of the clock signal 123 in the cycle of the clock pulse signal 123. . FIG. 3 b is a diagram showing signal waveforms in the vicinity of the PPM demodulation unit of the pulse modulation wireless communication apparatus according to the first embodiment.

In FIG. 3 b, the division of the frame formed by the interval of the clock pulse signal 123 is indicated by a solid vertical line, and the division of the transition time T of the four-value PPM is indicated by a vertical broken line in each frame.

 Further, two signal waveforms respectively supplied to mixers 304, 305, 306, and 307, that is, signal waveforms obtained by delaying clock pulse signal 123 by T by delay elements 301, 302, and 303, and data The waveform of the pulse signal 126 and the signal waveforms of the output signals 308, 309, 310, 311 of the detected correlations are shown.

 Furthermore, the pulse position determination unit 312 shows the signal waveform of the bit stream 128 which is the result of the determination of the pulse position.

 For example, in the case of the first frame of FIG. 3B, since the data pulse signal 126 has an impulse at the frame start position, the correlation is detected only by the mixer 304, and only the correlation detection result 308 is output in the frame. The pulse position determination unit 312 latches each correlation detection result for one frame time specified by the clock pulse signal 123, determines a combination of bits, and outputs a bit string of transmission data as a pulse determination result in the next frame time. Do

With such a configuration, an operation of transmitting and receiving data between the two pulse modulation wireless communication apparatuses according to the first embodiment will be described.

 First, in the transmission unit 100a, the transmission data generation unit 103 generates information to be transmitted according to the clock signal 102 generated by the clock generation unit 101 that determines the frame period of signal transmission, and the PPM modulation unit 104 Supply to. The PPM modulation unit 104 generates a PPM modulated pulse generation timing signal 105 according to the pulse generation position in the frame period specified by the clock signal 102 and supplies the pulse generation timing signal 105 to the pulse generation unit 106.

The pulse generation unit 106 generates a pulse signal 114 which is an impulse having a characteristic defined for data transmission according to the pulse generation timing signal 105, and the transmission RF unit 107 performs RF processing such as amplitude and band limitation. Data RF signal B is generated and transmitted through antenna 108. Similarly, pulse generation unit 109 is defined for clock transmission according to clock signal 102. The pulse signal 113 which is an impulse having the characteristic described above is generated, and the transmission RF unit 110 performs RF processing in the same manner as amplitude and band limitation to generate the clock RF signal A, and transmits it through the antenna 111.

 Next, receiving section 100b independently receives clock RF signal A and data RF signal B, which are respectively transmitted through different channels. The reception RF unit 122 performs RF processing such as removing unnecessary signals out of the use band from the clock RF signal A received by the antenna 121, and converts the signal into a clock pulse signal 123. On the other hand, the reception RF unit 125 performs an RF process such as removing unnecessary signals out of the use band from the data RF signal B received by the antenna 124, and converts it into a data pulse signal 126. The PPM demodulator 127 detects a pulse position in the frame of the data pulse signal 126 with reference to the clock pulse signal 123 to generate a bit stream 128, and demodulates it into received data in the demodulator 129. The demodulation unit 129 demodulates the output bit stream 128 and reproduces transmission data.

 By adopting such a configuration, in the first embodiment, the receiving unit appropriately receives the PPM modulation standard synchronization information, thereby maintaining the pulse position synchronization state. The signal can be demodulated immediately after receiving the signal. Also, the clock recovery block conventionally required, that is, the configuration without the adjustable time base configuring the conventional pulse modulation wireless communication device, enables equivalent reception operation, and PPM modulated data. The synchronous circuit that receives the signal can be configured simply.

 In the first embodiment, although a mode in which data communication is performed between two pulse modulation wireless communication devices provided with a transmission unit and a reception unit, respectively, both pulse modulation wireless communication devices The same effect can be obtained by providing both of the receiving units and transmitting and receiving data to each other.

 The pulse position setting unit 201 constituting the PPM modulation unit of the transmission unit shown in the first embodiment can be easily configured by a combination of logic elements, and is configured to be configured by different logic elements. It is a story.

The pulse position determination unit 201 constituting the PPM demodulation unit of the reception unit shown in the first embodiment can be easily configured by a combination of logic elements, and is configured to be configured by different logic elements. It is a story. The method of determining the combination of bits in pulse position determination section 201 shown in the first embodiment is table data for determination, for example, pulse position data indicating pulse position and its pulse position. It can be realized by a simple method such as storing table data, which is a set of output data representing an output bit stream corresponding to data, in advance and making reference to judgment.

 In Embodiment 1, clock RF signal A and data RF signal B are configured to use separate channels in order to achieve separate and asynchronous transmission, so transmission RF section 107 and transmission RF are used. Although section 110 separates by frequency using different transmission RF frequencies, if channel separation is possible, similar effects can be obtained as a form by means other than frequency separation, for example, CDMA Channel separation can also be performed by a method such as (Code Division Multiple Access).

 In the first embodiment, the signal generated by the transmission data generation unit of the transmission unit is a four-value digital signal in which the transmission signal in four states is generated in synchronization with the clock signal. The same effect can be obtained by generating a two-state transmission signal as a digital signal.

 In the first embodiment, the installation positions of the respective antennas are assumed to be sufficiently close to the relationship between the installation distance of the respective antennas of the transmission unit and the reception unit and the wavelength of the RF signal. In this embodiment, propagation conditions such as delays between transmission and reception of clock RF signal A and data RF signal B are regarded as substantially the same, but when the installation distance of each antenna is large with respect to the wavelength of the RF signal, It may be configured to include means for adjusting a minute synchronization between the clock pulse signal and the data pulse signal. However, since this does not affect the essential contents of the present invention, the description is omitted here.

 Embodiment 2

 Next, a pulse modulation wireless communication apparatus according to a second embodiment of the present invention will be described.

The pulse modulation wireless communication apparatus according to the first embodiment described above is configured to transmit the clock signal for each frame, whereas the pulse modulation wireless communication apparatus according to the second embodiment is Configure the clock signal to be sent once in multiple frames. , To reduce the repetition cycle of clock signal transmission.

 The configuration of the pulse modulation wireless communication apparatus according to the second embodiment will be described.

FIG. 4a is a block diagram showing a configuration of a transmission unit of the pulse modulation wireless communication apparatus according to the second embodiment. FIG. 4 b is a block diagram showing the configuration of the receiving unit of the pulse modulation wireless communication apparatus according to the second embodiment.

The configurations of transmitting unit 200 a and receiving unit 200 b are substantially the same as the configurations shown in the first embodiment, and therefore the description of the common parts will be omitted, and only the differences will be described.

The transmitting unit 200 a is provided with a synchronization generating unit 401 at the front stage of the pulse generating unit 109. The synchronization generation unit 401 outputs a pulse at a constant clock signal cycle determined in advance according to the input of the clock signal 102. The synchronization generation unit 401 is configured by a counter circuit or the like using a shift register.

 The receiving unit 200 b includes a clock recovery unit 402 as a clock signal source of the PPM demodulation unit 127. The clock recovery unit 402 internally has a clock signal source approximately equal to the interval of the clock signal 102 of the transmission unit 200 a, and when the clock pulse signal 123 is present, the frequency and phase of the clock signal source are converted to the clock pulse signal 123. It outputs the synchronized reproduced clock signal 404. The clock recovery unit 402 can be realized by a PLL (Phase Locked Loop) or the like, and can be realized, for example, by the configuration shown in FIG.

 FIG. 5a is a block diagram showing a configuration example of a clock recovery unit of the pulse modulation wireless communication apparatus according to the second embodiment.

 The clock recovery unit 402 a detects, as a voltage, the degree of phase mismatch in the clock signal source 501 that outputs a frequency signal close to the clock signal 102, the phase comparator 502, and the phase comparator 502. And consists of. The clock signal source 501 is capable of controlling the frequency of a VCO (Voltage Controlled Oscillator) or the like.

With this configuration, when clock pulse signal 123 is present, clock recovery unit 402 a generates a phase ratio between the clock pulse signal 123 and the output signal of clock signal source 501. A control signal detected by the comparator 502 and converted to a voltage value by the low pass filter 503 is supplied to the clock signal source 501. By controlling so as to reduce the phase error, the phase is synchronized by the PLL operation, and the reproduced clock signal 404 synchronized with the clock pulse signal 123 is continuously output.

 FIG. 5 b is a block diagram showing another configuration example of the clock recovery unit of the pulse modulation wireless communication apparatus according to the second embodiment.

 The clock recovery unit 402 b is configured of a clock recovery signal generation unit 504 that outputs a recovery clock signal 404 having a frequency close to that of the clock signal 102 having a reset signal input. Here, the clock reproduction signal generation unit 504 uses the clock pulse signal 123 as a reset signal input, and controls the phase of the reproduction clock signal 404 to return to the initial phase when there is a reset signal input, whereby the clock is generated. The reproduced clock signal 404 synchronized with the pulse signal 123 is continuously output.

 The operation of the pulse modulation wireless communication apparatus according to the second embodiment in such a configuration will be described.

 Transmitting section 200 a generates synchronous pulse signal 403 with a constant clock cycle generated by synchronization generating section 401, and transmits clock RF signal A and data RF signal B in the same process as in the first embodiment. Do.

 Receiving section 200b receives clock RF signal A and data RF signal B, generates regenerated clock signal 404 from received clock pulse signal 123, and demodulates data based on this regenerated clock signal 404. It is.

 With this configuration, in the second embodiment, the transmitting side transmits a pulse train at a constant clock signal cycle even if it is a data signal modulated by the multilevel PPM method, and the receiving side In this case, the reproduction clock pulse can be generated, and as in the case where the clock signal is transmitted for each frame, the synchronization circuit can obtain the demodulation result with a simple configuration. In addition, transmission of clock signals can be minimized to maintain synchronization accuracy, and transmission power can be reduced to reduce power consumption.

In the second embodiment, the synchronization generation unit 401 outputs the synchronization pulse signal at a constant clock signal cycle, but the same effect can be obtained by outputting information in units of information. You can get it. For example, it can be configured to output for each fixed byte amount output from the transmission data generation unit. That is, in FIG. 4A and FIG. 4B, the transmission data generation unit 103 supplies the synchronization request signal 405 to the synchronization generation unit 401 when the division of information unit occurs, and the synchronization generation unit 401 transmits the synchronization request from the transmission data generation unit 103. Only when the signal 405 is input, the clock signal 102 is pulsed to output and transmit the synchronization pulse signal 403. Further, the receiving side determines the division of the information unit from the clock pulse signal 123, refers to it as incidental information, and demodulates.

In the second embodiment, the synchronization generation unit 401 outputs the synchronization pulse signal at a constant clock signal cycle. However, even if the pulse interval of the clock RF signal A is variable, the same applies. You can get the effect of The synchronization pulse signal is variably controlled so that the synchronization pulse signal is continuously output at the time of synchronization pull-in immediately after the start of communication, and the synchronization pulse signal is controlled to be sparsely output after the establishment of synchronization. In this way, at the time of synchronization pull-in where the importance of the synchronization pulse signal is high, a large number of synchronization pulse signals can be used, and the necessity of the synchronization pulse is not relatively high. Can have an effect of maximizing the payload in communication, which can suppress transmission of unnecessary synchronization pulse signals.

 Third Embodiment

 Next, a pulse modulation wireless communication apparatus according to a third embodiment of the present invention will be described.

The pulse-modulated wireless communication device according to the second embodiment is configured to send clock signals at a rate of once in a plurality of frames, whereas the pulse-modulated wireless communication device according to the third embodiment is configured to transmit the clock signal. Further, additional information such as a parity bit is added to the clock signal on the transmitting side, and the error detection or error correction is performed on the receiving side.

 The configuration of the pulse modulation wireless communication apparatus according to the third embodiment will be described.

 FIG. 6a is a block diagram showing the configuration of the transmission unit of the pulse modulation wireless communication apparatus according to the third embodiment. FIG. 6 b is a block diagram showing the configuration of the receiving unit of the pulse modulation wireless communication apparatus according to the third embodiment.

The configurations of transmitting unit 300 a and receiving unit 300 b are the same as those shown in the second embodiment. As they are almost the same, the explanation of the common parts is omitted and only the differences are explained.

 Transmitting section 300 a includes superimposed data generating section 601 which superimposes information on clock signal 102 and outputs superimposed pulse signal 604, instead of synchronization generating section 401 in the second embodiment. The receiving unit 300 b further includes a superimposed data decoding unit 602 that extracts superimposed data 605 indicating information superimposed on the clock pulse signal 123 from the reproduction clock signal 404 and the clock pulse signal 123, and supplies the superimposed data 605 to the demodulation unit 12 9. It is.

 Here, since clock signal 102 is sent at a rate of once in a plurality of frames, insertion of information bits is impossible in the configuration of Embodiment 1 where clock signals are sent out continuously. It will be possible. That is, by configuring the clock signal 102 with a plurality of bits, an information unit defined by a plurality of frames, for example, a noise bit in 1 byte unit or 1 packet unit, or error correction can be used as an information bit. Include information for

 The operation of the pulse modulation wireless communication apparatus according to the third embodiment will be described with such a configuration.

 In transmission unit 300 a, transmission data generation unit 103 supplies incidental information data 603 to superimposed data generation unit 601 in addition to synchronization request signal 405 in Embodiment 2 at the delimitation of information units, and A superimposed pulse signal 604 is generated including additional information in a data region defined by a plurality of clocks later, and a clock RF signal A is transmitted. At this time, the transmission data generation unit 103 provides data areas for a plurality of clocks after the clock signal 102 and adds incidental information such as a parity 'bit by ASK (Amplitude Shift Keying) method. Are pulsed and transmitted.

 In the receiving unit 300b, the clock recovery unit 402 synchronizes the recovered clock signal 404 with the first pulse of the clock pulse signal 123 as in the second embodiment. Further, the clock pulse signal 123 is supplied to the superposition data decoding unit 602, and the superposition data 605 which is additional information included after the first pulse of the clock pulse signal 123 is decoded and output to the demodulation unit 129.

With this configuration, in the third embodiment, the synchronization pulse train is transmitted for each fixed symbol, and additional information such as the parity 'bit of the data signal is added to the synchronization signal. By superimposing the information, it is possible to improve the reliability so that the error detection or error correction can be performed by additional information such as a notary bit that can not compress the payload of the information bit.

 In the third embodiment, the data region is configured as an ASK method simply by the presence or absence of a clock signal, but a PPM method may be a bi-phase modulation method that is binary phase modulation.

 Embodiment 4

 Next, a pulse modulation wireless communication apparatus according to a fourth embodiment of the present invention will be described.

In the first embodiment, the clock signal is transmitted without modulation for each frame, whereas in the fourth embodiment, the clock signal is transmitted by PPM modulation. By doing this, the unevenness due to the frequency in the frequency spectrum of the clock RF signal due to the repetition period of the clock signal is reduced, that is, the white power is improved, and the transmission power efficiency of the clock signal is improved. To improve and reduce power consumption in transmission.

 The configuration of the pulse modulation wireless communication apparatus according to the fourth embodiment will be described.

 [0119] FIG. 7a is a block diagram showing the configuration of the transmission unit of the pulse modulation wireless communication apparatus according to the fourth embodiment of the present invention. Further, FIG. 7 b is a block diagram showing a configuration of a receiving unit of the noise modulation radio communication apparatus according to the fourth embodiment of the present invention. The configurations of the transmitting unit 400a and the receiving unit 40Ob are substantially the same as the configurations shown in the first embodiment, and therefore the description of the common portions will be omitted, and differences will be described.

 The transmitting unit 400 a performs PPM modulation on the clock signal 102 in accordance with the pseudo random number sequence data 705, and generates a random number pulse. The pseudo random number generation unit 701 generates the pseudo random number sequence data 705 in synchronization with the clock signal 102. And a clock PPM modulator 702 for outputting the signal 706.

Reception unit 400 b performs PPM demodulation using pseudo random number generation unit 703 that generates pseudo random number sequence data 707 in the same sequence as transmission unit 400 a and pseudo random number sequence data 707 output from pseudo random number generation unit 703. A clock PPM demodulator 704 is provided to generate a reproduced clock signal 708. The operation of the pulse modulation wireless communication apparatus according to the fourth embodiment having such a configuration will be described.

 In the transmitter 400 a, the pseudo random number generator 701 supplies the clock signal 102 to the clock PPM modulator 702 as the pseudo random number sequence data 705 as a modulation code. The clock PPM modulator 70 2 performs pulse position modulation and supplies a random pulse signal 706 to the pulse generator 109.

 In the reception unit 400 b, the pseudo random number generation unit 703 supplies the clock PPM demodulation unit 704 with the same pseudo random number sequence data 707 as the pseudo random number generation unit 701 of the transmission unit 40 Oa, and the clock PPM demodulation unit 704. The clock pulse signal 123 is PPM demodulated to generate a random number reproduction clock signal 708. Here, in order to synchronize the phase of the pseudo random number sequence data 707 in the pseudo random number generation unit 703 with the modulation side, the phase is synchronized by the sweep means or the like when synchronization is established.

 By adopting such a configuration, in the fourth embodiment, the synchronization signal modulated by the random pattern using the pseudo random number sequence data is sent out to the synchronization channel, and the reception side reproduces the signal according to the same random pattern. As a result, the frequency spectrum of the clock RF signal can be equalized, and the synchronization efficiency of the synchronization channel signal can be improved without the need for a high precision synchronization circuit after synchronization channel synchronization.

 Generally, clock signal 102 has such a characteristic that power concentrates on a component of a fixed multiple or a division frequency of the repetition frequency of the clock, but in the fourth embodiment, pulse position modulation is performed, and a pseudo random number sequence is generated. By generating a clock RF signal A that exhibits uniform frequency characteristics in a band by the spread of frequencies due to data, power in the frequency band can be used closely to obtain an efficient transmission signal.

 Embodiment 5

 Next, a pulse modulation wireless communication apparatus according to a fifth embodiment of the present invention will be described.

In the fourth embodiment, the PPM method is used as pulse modulation. In the fifth embodiment, a biphase modulation method is used instead of the PPM method. Even with this configuration, the same effects as in Embodiment 4 can be obtained.

FIGS. 8a and 8b are block diagrams showing configurations of a transmitting unit and a receiving unit of a pulse modulation wireless communication apparatus according to a fifth embodiment of the present invention, respectively. FIG. 7 is a block diagram showing configurations of a transmitting unit and a receiving unit when a bi-phase modulation method is used for a modulation unit of a pulse modulation wireless communication apparatus to be used.

 The difference between the configuration using the bi-phase modulation method in the fifth embodiment and the configuration using the PPM method shown in the fourth embodiment will be described.

 The transmission unit 500 a includes a bi-phase modulation unit 801 that bi-phase modulates the clock signal 102 according to the pseudo random number sequence data 705 and outputs a random number pulse signal 803. The receiving unit 500 b includes a pulse detection unit 802 instead of the pseudo random number generation unit 703 and the clock PPM demodulation unit 704. The pulse detection unit 802 detects the synchronization timing by detecting the repetition frequency of the biphase modulation by envelope detection of the input kernel, and generates the noise reproduction clock signal 804.

 In the mode using the bi-phase modulation method, when the buffer reproduction clock signal 804 is reproduced from the clock pulse signal 123 in the reception unit 500 b, the despreading process by the pseudo random number generation unit 703 and the buffer demodulation is performed. It is possible to detect the basic pulse interval of bi-phase modulation by envelope detection etc. without doing this, and this configuration is effective when realizing a simple reception configuration.

 Embodiment 6

 Next, a pulse modulation wireless communication apparatus according to a sixth embodiment of the present invention will be described.

In the pulse modulation wireless communication apparatus according to the sixth embodiment, when transmitting separately to a plurality of terminals simultaneously, the data RF signal is separately transmitted, and the clock RF signal is shared. The circuit configuration of the transmitter is reduced to reduce power consumption.

 The configuration of the pulse modulation wireless communication apparatus according to the sixth embodiment will be described.

 FIG. 9a is a block diagram showing the configuration of the transmission unit of the pulse modulation wireless communication apparatus according to the sixth embodiment. Further, FIG. 9 b is a block diagram showing the configuration of the receiving unit of the first pulse modulation wireless communication apparatus according to the sixth embodiment. FIG. 9c is a block diagram showing the configuration of the receiving unit of the second pulse modulation wireless communication apparatus according to the sixth embodiment.

The configurations of transmitting unit 600 a and receiving units 600 b and 600 c are almost the same as the configuration shown in the first embodiment, so the description of the common parts will be omitted, and only differences will be described. In addition to the configuration described in Embodiment 1, transmission section 600 a includes transmission data generation section 903, PPM modulation section 904, pulse generation section 906, transmission RF section 907, and antenna 908. Two transmitters are provided. Also, the receiver 600 b and 600 c have the same configuration, and the receiver 600 c has an antenna 921, a receiver RF receiver 922, an antenna 924, a receiver RF receiver 925, a PPM demodulator 927, and a demodulator 929. And share the reception system of the clock RF signal A with the receiver 600c!

 The operation of the pulse modulation wireless communication apparatus according to the sixth embodiment having such a configuration will be described.

 The data modulation / demodulation operation of transmission section 600 a and reception sections 600 b and 600 c is substantially the same as the operation in the first embodiment. Then, the transmitting unit 600a generates and sends out the clock RF signal A, the data RF signal B for the receiving unit 600b, and the data RF signal C for the receiving unit 600c. Further, the receiving unit 600b receives the clock RF signal A and the data RF signal B and demodulates data, and the receiving unit 600c receives the clock RF signal A and the data RF signal C and demodulates data.

 By adopting such a configuration, in the sixth embodiment, when data communication is simultaneously performed with a plurality of pulse modulation wireless communication devices, the synchronization channel is set to one device power and the other device. By sharing and transmitting different data simultaneously, it is possible to improve the utilization efficiency of the synchronization channel signal.

 Although Embodiment 6 shows a mode in which the data transmission / reception unit has two systems, the same effect can be obtained by sharing one clock RF signal in transmitting / receiving a plurality of data in three or more systems. You can get

 Embodiment 7

 Next, a pulse modulation wireless communication apparatus according to a seventh embodiment of the present invention will be described.

The pulse-modulated wireless communication apparatus according to the seventh embodiment transmits a signal having phase continuity between pulse signals as a clock RF signal to transmit a LO signal for frequency conversion in demodulation. The circuit configuration of the receiving device is reduced and power consumption is reduced by using it as a signal and not having an oscillator that generates an LO signal on the receiving side. The configuration of the pulse modulation wireless communication apparatus according to the seventh embodiment will be described.

 FIG. 10a is a block diagram showing an example of the configuration of the transmission RF unit of the transmission unit of the pulse modulation wireless communication apparatus according to the seventh embodiment, and the other configuration is the same as that of the first embodiment. , The description is omitted.

 In FIG. 10a, the transmission RF unit 1001 of the transmission apparatus is composed of an RF signal source 1003 and a short pulse generation circuit 1004, and based on the pulse signal 1002 generated by the pulse generation unit, the short pulse generation circuit 1004 Force RF signal source 1003 switches passage and blocking of the signal output, converts it into a short pulse signal, and outputs it as a clock RF signal and data RF signal. The configuration includes an antenna 1005 for transmission.

 The short pulse circuit 1004 may be configured using a switch circuit or a mixer circuit. In addition, it is preferable to use a continuous oscillation circuit as the RF signal source, because the phase continuity between the pulses is required. However, the circuit that oscillates intermittently or the desired band of the impulse signal is extracted and the signal is extracted. It is possible to use the method of generating the signal and the method of digitally superposing the signal as well as the function of adjusting the phase. In continuous oscillation circuits, it is easy to realize phase continuity, and other methods are advantageous for reducing power consumption because the operation time is short.

 FIG. 10 b is a block diagram showing another example of the configuration of the transmission RF unit of the transmission unit of the pulse modulation wireless communication apparatus according to the seventh embodiment, and the other configuration is the first embodiment. Description is omitted because it is the same.

 [0150] In FIG. 10 b, based on the pulse signal 1007 based on the clock signal and the pulse signal 1008 based on the transmission data, a plurality of short noises are generated based on the signal from the same RF signal source 1003. A short pulse is generated using an overhead circuit 1006 a or 1006 b, and transmission is performed from the antenna 1005. As a result, the configuration of the transmission RF unit 1001 can be simplified, and the number of antennas 1005 can be reduced.

 FIG. 11a is a block diagram showing an example of the configuration of the reception RF unit of the reception unit of the pulse modulation wireless communication apparatus according to the seventh embodiment, and the other configuration is the same as that of the first embodiment. , The description is omitted.

In FIG. 11a, reference numeral 1101 denotes a reception RF unit, and an RF signal source 1102 and a down mixer 1103 Are configured. Transmitter power The clock RF signal and data RF signal sent out are high frequency signals, so it is difficult to receive as it is. Therefore, it is necessary to convert to a low frequency signal. The RF signal received by the antenna 1105 is input to the downmixer 1103, and the signal from the RF signal source 1102 is downconverted to a signal of an appropriate frequency as an LO signal and output as a pulse signal 1104.

 FIG. 1 ib is a block diagram showing another example of the configuration of the reception RF unit of the reception unit of the pulse modulation wireless communication apparatus according to the seventh embodiment, and the other configuration is the same as that of the first embodiment. Therefore, the explanation is omitted.

 In FIG. 1 i b, 1106 is a reception RF unit, and the signal received by antenna 1105 is branched into two, one being inputted to down mixer 1103 as in FIG. 11 a, but one being a band limiting filter It is input to 1107. The signal input to the down mixer 1103 is converted into a continuous signal in order to extract only the frequency of the LO signal in a narrow band, and is input to the down mixer 1103 as an LO signal.

 Therefore, according to such a configuration, as compared with the configuration shown in FIG. 11a, the LO signal source for reception is not required, the device configuration is simplified, and the power consumption can be reduced.

12a to 12d show waveforms of signals received by the reception RF unit shown in FIG.

[0157] FIG. 12a is a signal received by the antenna 1105, and FIG. 12b is a partially enlarged signal thereof. Thus, the pulse-like signal received by the antenna 1105 contains a sine wave component.

 FIG. 12 c is an output signal of the band limiting filter 1107, and FIG. 12 d is a partially enlarged signal thereof. As described above, in the output signal of the band limiting filter 1107, an intermittent signal is converted into a continuous signal.

 12a to 12d show an example in which the RF frequency band is 25 GHz, the pulse width lns, and the band of the band limiting filter is 300 MHz. Usually, since the RF signal source frequency of the transmitter and the receiver is generated using different reference signal sources, it is necessary to constantly correct the frequency shift, but in this configuration, the RF signal power is extracted to the LO signal. The use of a signal eliminates the need for misregistration correction, and enables simplification of the circuit configuration.

With such a configuration, in the seventh embodiment, the clock RF signal is used as a clock RF signal. By transmitting a signal having phase continuity between source signals and using it as an LO signal for frequency conversion at the time of demodulation, the circuit configuration of the receiving apparatus can be reduced and power consumption can be reduced.

 In each of the above embodiments, the PPM modulation unit 104 or the PPM demodulation unit 127 has been described for a pulse modulation wireless communication apparatus configured by a pulse position modulation method in which the position of a pulse is modulated according to transmission data. However, the present invention relates to a pulse amplitude modulation method that modulates the amplitude of a pulse according to transmission data, a pulse phase modulation method that modulates the phase of a pulse according to transmission data, or a pulse frequency according to transmission data. The method for achieving synchronization when the data is received by the receiver even if it is configured by any of the pulse frequency modulation schemes that modulate the signal is the same as in each embodiment configured by the PPM modulation scheme, and therefore Regardless of which modulation scheme is used, it is possible to maintain the synchronized state at the time of data reception by the reception unit, and to be able to demodulate the signal promptly after data reception. To be Do, is that.

 Industrial applicability

The pulse modulation wireless communication device according to the present invention is useful for providing a small-sized and inexpensive PPM modulation wireless device excellent in mass productivity.

Claims

The scope of the claims

 [1] A clock generation unit that generates a clock signal indicating the timing of each frame of a transmission signal, a first pulse generation unit that generates a pulse signal at the timing of the clock signal, and the first pulse generation unit A first transmission conversion unit that converts the pulse signal into a clock signal to generate a clock conversion signal and sends the clock signal to a synchronization signal channel; a transmission data generation unit that generates transmission data in synchronization with the timing of the clock signal; A pulse modulation unit that pulse-modulates transmission data to output a pulse generation timing signal, a second pulse generation unit that generates a pulse signal at the timing of the pulse generation timing signal, and a second pulse generation unit The pulse signal is converted to generate a data conversion signal, and the data signal channel is a signal channel different from the synchronization signal channel. A pulse modulation wireless communication apparatus comprising:

[2] A clock conversion signal obtained by converting a clock pulse signal is received from a synchronization signal channel, and a first reception conversion unit generating the clock pulse signal; a data conversion signal obtained by converting a data pulse signal; A second reception conversion unit that receives from a data signal channel that is a signal channel different from the channel and generates the data pulse signal, and pulse-demodulates the data pulse signal with reference to the clock pulse signal to generate a bit string. A pulse modulation radio communication apparatus comprising: a pulse demodulation unit that outputs a signal; and a demodulation unit that demodulates the bit stream into reception data based on the clock pulse signal.

[3] The pulse position setting unit which sets a modulation pulse position indicating a pulse position of pulse modulation according to the transmission data, and outputs a pulse control signal corresponding to the modulation pulse position; The multistage delay unit outputs the clock signal delayed according to the pulse positions of all the pulse modulations, and the switch unit selects and outputs the output signal of the multistage delay unit according to the pulse control signal. The pulse modulation wireless communication device according to claim 1.

[4] A multistage delay unit for outputting the clock pulse signal delayed according to pulse positions of all pulse modulations, and a correlation between an output signal of the multistage delay unit and the data pulse signal. And a correlation unit that detects a correlation signal and outputs a correlation signal, and a pulse that determines a pulse position of the pulse modulation according to the correlation signal and outputs a bit stream. The pulse modulation wireless communication device according to claim 2, further comprising:

 [5] The device further includes a synchronization generation unit that generates a synchronization pulse signal that is a pulse signal of a fixed cycle according to the clock signal, and the first pulse generation unit generates a pulse signal at the timing of the synchronization pulse signal. The pulse modulation wireless communication device according to claim 1.

 [6] The device further comprises a clock recovery unit that generates a recovery clock signal indicating every frame timing from a clock pulse signal of a fixed cycle, and the pulse demodulation unit pulse demodulates the data pulse signal based on the recovery clock signal. The pulse modulation radio communication apparatus according to claim 2, wherein the bit stream is output, and the demodulator demodulates the bit stream into received data based on the reproduction clock signal.

 [7] The clock recovery unit operates at a frequency approximating the preset frame timing, and the clock signal source whose frequency can be controlled by the voltage of the external force, the clock signal source, and the clock pulse signal 7. The control circuit according to claim 6, further comprising: a phase comparison unit that outputs an error amount indicating a phase difference; and a low pass filter that converts the error amount into a control voltage and outputs the control voltage. Pulse modulation wireless communication device.

 [8] The clock recovery unit operates at a frequency approximating the preset frame timing, and the clock recovery signal generation unit is resettable so that the phase of the output signal is returned to the initial phase by the external signal. 7. The pulse modulated radio communication apparatus according to claim 6, further comprising: synchronizing the phase of the recovered clock signal by the input of the clock pulse signal.

 [9] Superimposed data generation for generating a superimposed pulse signal comprising a pulse signal of a fixed cycle corresponding to the clock signal and a pulse signal in which incidental information data indicating incidental information of the transmission data is superimposed on the clock signal The transmission data generation unit further generates the incidental information data together with the transmission data in synchronization with the timing of the clock signal, and the first pulse generation unit generates the timing of the superimposed pulse signal. The pulse modulation wireless communication device according to claim 1, wherein the pulse modulation signal is generated by

[10] A clock recovery unit for generating a recovery clock signal indicating every frame timing from a clock pulse signal in which a pulse signal of a fixed cycle and additional information data indicating additional information of the transmission data is superimposed; And a superimposed data decoding unit that extracts the incidental information data from the superimposed clock pulse signal and generates superimposed data according to The pulse modulation wireless communication device according to claim 2, further comprising: the demodulation unit demodulates the superimposed data and the bit stream into reception data based on the reproduction clock signal.

 [11] A pseudorandom number generation unit that generates pseudorandom number sequence data according to the clock signal, and a clock pulse modulation unit that generates a random number pulse signal obtained by pulse-modulating the clock signal according to the pseudorandom number sequence data. The pulse modulation wireless communication apparatus according to claim 1, further comprising: the first pulse generation unit generates a pulse signal at a timing of the random number pulse signal.

 [12] A clock pulse demodulation unit for generating a random number reproduction clock signal indicating a frame timing and a clock pulse signal strength pulse-modulated according to the pseudo random number sequence data, and the pseudo random number sequence at the timing of the random number reproduction clock signal And a pulse demodulation unit that pulse-demodulates the data pulse signal based on the random number reproduction clock signal to output a bit stream, and the demodulation unit generates the random number reproduction clock signal. The pulse modulation radio communication apparatus according to claim 2, wherein the bit stream is demodulated to reception data based on a lock signal.

[13] A pseudo random number generation unit that generates pseudo random number sequence data according to the clock signal, and a bi-phase modulation unit that generates a random number pulse signal obtained by bi-phase modulating the clock signal according to the pseudo random number sequence data The pulse-modulated wireless communication device according to claim 1, further comprising: a first pulse generation unit that generates a pulse signal at a timing of the random number pulse signal.

 [14] A pulse detection unit for detecting a repetition frequency of the bi-phase modulation from a clock pulse signal bi-phase modulated according to pseudo random number sequence data and generating a bi-phase reproduction clock signal indicating each frame timing is further provided. The pulse demodulation unit pulse-demodulates the data pulse signal based on the bi-phase reproduction clock signal and outputs a bit stream, and the demodulation unit receives the bit stream based on the bi-phase reproduction clock signal. The pulse-modulated wireless communication device according to claim 2, wherein the pulse-modulated wireless communication device demodulates into a signal.

[15] The transmission data generation unit, the pulse modulation unit, the second pulse generation unit, and A plurality of second transmission conversion units are provided, and transmission data for a plurality of communication destinations are modulated to be synchronized with the timing of the clock signal, respectively, to generate data conversion signals. The pulse modulated radio communication device according to claim 1, wherein the pulse modulated radio communication device transmits the data signal channel set to

 [16] The pulse modulation wireless communication system according to claim 2, wherein the second reception conversion unit selects and receives the data conversion signal in which a plurality of the data signal channel powers are also preset, and generates the data pulse signal. apparatus.

 [17] The pulse modulation unit is configured by either a pulse amplitude modulation method of modulating the amplitude of a pulse, a pulse phase modulation method of modulating the phase of the pulse, or a pulse frequency modulation method of modulating the frequency of the pulse. The pulse modulation wireless communication device according to claim 1.

 [18] The pulse demodulation unit is configured by either a pulse amplitude modulation method of modulating the amplitude of a pulse, a pulse phase modulation method of modulating the phase of the pulse, or a pulse frequency modulation method of modulating the frequency of the pulse. The pulse modulation wireless communication device according to claim 2.

 [19] The pulse modulation wireless communication device according to any one of claims 1 to 16, wherein a frequency band used by the synchronization signal channel is narrower than a frequency band used by the data signal channel.