WO2005112380A1 - Procede de communication sans fil et systeme de communication sans fil - Google Patents

Procede de communication sans fil et systeme de communication sans fil Download PDF

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Publication number
WO2005112380A1
WO2005112380A1 PCT/JP2004/006441 JP2004006441W WO2005112380A1 WO 2005112380 A1 WO2005112380 A1 WO 2005112380A1 JP 2004006441 W JP2004006441 W JP 2004006441W WO 2005112380 A1 WO2005112380 A1 WO 2005112380A1
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Prior art keywords
signal
wireless
wireless communication
modulation
modulation signal
Prior art date
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PCT/JP2004/006441
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English (en)
Japanese (ja)
Inventor
Yozo Shoji
Hiroyo Ogawa
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National Institute Of Information And Communications Technology
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Application filed by National Institute Of Information And Communications Technology filed Critical National Institute Of Information And Communications Technology
Priority to JP2006513467A priority Critical patent/JP4448942B2/ja
Priority to PCT/JP2004/006441 priority patent/WO2005112380A1/fr
Publication of WO2005112380A1 publication Critical patent/WO2005112380A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying

Definitions

  • the present invention relates to a radio communication method and radio communication system for a predetermined digitally modulated signal.
  • the present invention relates to a technique for realizing high transmission efficiency.
  • the TDMA method tends to be used favorably in terms of flexibility regarding information asymmetry in the uplink and downlink and simplification of equipment.
  • the high-speed burst communication includes, for example, gigabit-class communication.
  • a preamble part that is a predetermined bit string (for example, a sequence of ten consecutive bits) is inserted at the beginning of a burst signal, and at the same time, a PLL circuit for clock regeneration is used.
  • This method also has a problem that the preamble has to be lengthened as synchronization becomes difficult due to ultra-high-speed communication, which substantially presses the payload. For example, in a TDMA system accommodating a large number of mobile terminals even in the current communication of about 100 to 200 Mbps, a preamble section of 10% or more must be provided, and the transmission efficiency deteriorates.
  • the conventional technology uses a millimeter-wave oscillator using an expensive external stabilizing circuit, or uses a frequency that is not significantly affected by frequency instability such as ASK modulation.
  • a low efficiency, basic modulation scheme was used.
  • Such a conventional method requires a special circuit configuration corresponding to a high frequency band, and thus has a problem that the cost is high and a modulation method is limited.
  • the present invention enables high-speed burst communication even in the high frequency band as described above, and aims at realizing an ultra-high-speed wireless access system, and provides a wireless communication method and system suitable for that purpose. In order to do so, the following means have been created.
  • the present invention is a wireless communication method for transmitting transmission information digitally modulated using a predetermined digital modulation method between a transmitter and a receiver.
  • a first wireless modulation signal modulated with the transmission information is transmitted from a transmitter in a first polarization direction, and a predetermined signal processing is performed directly with the first wireless modulation signal.
  • the second radio modulation signal modulated with the complementary signal which generates a clock signal or a frequency-divided signal of a clock whose generation is easy, is performed by a second polarization orthogonal to the first polarization direction. Transmit in the direction.
  • the clock signal is reproduced by the above-described signal processing of the first radio modulation signal and the second radio modulation signal, and the first radio modulation signal detected synchronously or asynchronously is reproduced. Demodulation is performed using the clock signal.
  • the predetermined signal processing in claim 1 is multiplication processing, and the first radio modulation signal and the second radio modulation signal are received in a receiver.
  • signal A clock signal or a frequency-divided signal of a clock whose generation is easy is reproduced from the product component of the clock signal.
  • a configuration according to claim 3 is the same wireless communication method, wherein a first wireless modulation signal modulated with transmission information is transmitted from a transmitter in a first polarization direction, and the transmission information and the first wireless modulation signal are transmitted.
  • a clock signal or a frequency-divided signal of a clock whose generation is easy to generate is generated. Is transmitted in the second polarization direction orthogonal to.
  • the receiver reproduces the clock signal by the logical operation of the detection output obtained from the first wireless modulation signal and the detection output obtained from the second radio modulation signal, and performs synchronous detection or asynchronous detection.
  • the demodulated first wireless modulation signal is demodulated using the clock signal.
  • a configuration according to claim 4 is the configuration according to claim 3, wherein the predetermined logical operation is an exclusive OR, and the exclusive logical sum of the radio modulation signal and the complementary signal is obtained in the receiver. The clock signal is reproduced from the sum.
  • the transmitter transmits the wireless modulation signal of the transmission information in the first polarization direction and easily generates the clock signal or the clock signal.
  • a second wireless modulation signal modulated by a complementary signal that is the frequency-divided signal is transmitted in a second polarization direction orthogonal to the first polarization direction.
  • the clock signal is reproduced by detecting the second radio modulation signal, and the transmission information is demodulated using the clock signal of the first radio modulation signal detected synchronously or asynchronously. It is characterized by doing.
  • a configuration according to claim 6 is the radio communication method according to claims 1 and 2, claim 3 and 4, or claim 5, wherein the transmitter operates the phase of the second radio modulation signal. Equal to the first radio modulation signal, and are sequentially shifted by ⁇ / ⁇ ( ⁇ is an integer) at the symbol transmission timing and transmitted, or only the even-numbered transmission symbols are shifted by ⁇ ⁇ ( ⁇ is an integer). And send.
  • the receiver reproduces the clock by signal processing between the first and second radio modulation signals, or reproduces the clock signal directly from only the second radio modulation signal, and
  • the first wireless modulation signal is synchronously detected and demodulated using a second wireless modulation signal whose phase is regularly shifted for each symbol.
  • the digital modulation scheme is a binary phase shift keying scheme (B
  • PSK method or multi-level phase shift keying method (M-array PSK method).
  • the digital modulation scheme is a multi-level quadrature amplitude modulation scheme.
  • the configuration according to claim 9 is the configuration according to claim 8, wherein the second radio is transmitted in advance so that the amplitude of the clock signal is constant when the transmitter reproduces the clock signal in the receiver.
  • the modulation signal is transmitted while controlling its amplitude.
  • the second wireless modulation signal is previously set so that the composite envelope of the signal output from the transmitter is constant.
  • the transmission is characterized by controlling the amplitude.
  • the transmitter uses the configuration of claims 1 to 10 in the radio burst header portion or the brimble portion to transmit the complementary signal for reproducing the clock signal on the receiver side to the second signal.
  • the second wireless modulation signal is transmitted by the second wireless modulation signal, and then the second wireless modulation signal modulated by the second transmission information different from the transmission information used for the modulation of the first wireless modulation signal is generated.
  • the transmitting force S can be in the second polarization direction orthogonal to the one polarization direction.
  • the present invention can also provide a wireless communication system including a transmitter and a receiver for communicating transmission information digitally modulated using a predetermined digital modulation scheme.
  • This wireless communication system is realized by implementing the above wireless communication method.
  • the clock can be instantaneously reproduced on the receiving side without using a very short preamble length or providing a preamble part, so that the transmission efficiency is extremely high and high speed. Wireless transmission is possible. At this time, the synchronization clock input time is practically unnecessary, and the transmission efficiency is close to 100%. Furthermore, even when jitter occurs in the transmission symbol sequence, the clock that gives the ideal symbol decision time is also transmitted and transmitted, so that signal degradation does not occur. [0021] Furthermore, since a PLL circuit for clock recovery is not required, wireless communication can be easily realized and also contributes to low cost.
  • the wireless communication method described in claim 6 in addition to the above, it is equivalent to synchronous (orthogonal) detection with a carrier signal in a radio frequency band (RF) used for modulation on the transmitting side. Even if a low-cost RF oscillator with poor frequency stability is used for the transmitter, it is possible to stably transmit a high-efficiency modulation signal such as a multilevel quadrature modulation signal, and to reduce the cost of the transmitter. You can also.
  • RF radio frequency band
  • the receiver does not require a carrier recovery circuit for synchronous detection and an RF oscillator, which contributes to cost reduction.
  • a binary phase shift keying (BPSK) or a multi-level phase shift keying (M-array PSK) can be used as a digital modulation method.
  • a multi-level quadrature amplitude modulation method (QAM method) can be used.
  • the clock can be instantaneously reproduced on the receiving side, so that high-speed wireless transmission with extremely high transmission efficiency can be performed. Even when a jitter occurs in the transmission symbol sequence, since a clock that gives an ideal symbol determination time is also transmitted, signal deterioration due to this is not caused. Since a PLL circuit for clock regeneration is not required, the realization of a wireless communication system is facilitated and the cost is reduced.
  • synchronous (orthogonal) detection with a carrier signal in a radio frequency band (RF) used for modulation on the transmitting side is equivalent to transmission. Even if a low-cost RF oscillator with poor frequency stability is used for the transmitter, it is possible to stably transmit high-efficiency modulation signals such as multi-level quadrature modulation signals, and to reduce the cost of the transmitter. You can also. Also, the receiver does not need a carrier recovery circuit for synchronous detection and an RF oscillator, which contributes to low cost.
  • BPSK binary phase shift keying
  • M-array PSK multi-level phase shift keying
  • a multi-level quadrature amplitude modulation method (QAM method) can be used.
  • FIG. 1 is a signal diagram according to a first embodiment of the present invention.
  • FIG. 2 is a configuration diagram of a transmitter according to Embodiment 1 of the present invention.
  • FIG. 3 is a configuration diagram of a receiver (Embodiment 1) in Embodiment 1 of the present invention.
  • FIG. 4 is a configuration diagram of a receiver (Embodiment 2) in Embodiment 1 of the present invention.
  • FIG. 5 is a configuration diagram of a receiver (Embodiment 3) in Embodiment 1 of the present invention.
  • FIG. 6 is a configuration diagram of a receiver (Embodiment 4) in Embodiment 1 of the present invention.
  • FIG. 7 is a signal diagram according to Embodiment 2 of the present invention.
  • FIG. 8 is a signal diagram according to a third embodiment of the present invention.
  • FIG. 9 is a configuration diagram of a receiver according to a third embodiment of the present invention.
  • FIG. 10 is a signal diagram according to a fourth embodiment of the present invention.
  • FIG. 11 is a configuration diagram of a transmitter according to a fourth embodiment of the present invention.
  • FIG. 12 is a configuration diagram of a receiver according to a fourth embodiment of the present invention.
  • FIG. 13 is a signal diagram showing a signal and an auxiliary signal according to a fifth embodiment of the present invention, and a clock signal obtained by multiplying them by a product.
  • FIG. 14 is a configuration diagram of a transmitter according to Embodiment 5 of the present invention.
  • FIG. 15 is a configuration diagram of a receiver according to Embodiment 5 of the present invention.
  • FIG. 16 is a signal diagram illustrating generation of a divided signal clock signal.
  • FIG. 17 is a configuration diagram of a receiving circuit when generating a clock signal.
  • FIG. 18 is an embodiment of an antenna for transmitting and receiving V polarization and H polarization according to the embodiment of the present invention.
  • FIG. 19 is another embodiment of the antenna for transmitting and receiving right-handed polarization and left-handed polarization according to the embodiment of the present invention.
  • the present invention transmits a first radio modulation signal digitally modulated with information to be transmitted with a polarization in a certain direction, and also generates a clock signal or a frequency-divided signal that facilitates generation of a clock signal, or a first radio signal.
  • the main purpose is to transmit a second radio modulation signal modulated by a complementary signal that can generate the modulated signal by performing predetermined signal processing or logical operation on a polarization orthogonal to the above polarization. is there.
  • Patent Document 1 As a wireless communication method using orthogonal polarization, there is a technique disclosed in Patent Document 1 by the present applicant.
  • the transmitter of this technology generates an RF-band unmodulated carrier equivalent to the signal when the modulated signal is not superimposed on the wireless modulated signal to be transmitted, and generates the wireless modulated signal with a polarization orthogonal to the wireless modulated signal. Transmit with the signal.
  • the receiver extracts and reproduces only the unmodulated carrier component from one of the polarization components of the received signal, and uses this signal to synchronously detect the radio modulation signal extracted from the other polarization component.
  • Patent Document 1 JP 2003-273763 A
  • the unmodulated carrier is transmitted together, so that the same characteristics as the radio modulation signal are obtained.
  • the wireless modulation signal is synchronously detected using the unmodulated carrier that has deteriorated, and as a result, it is possible to cancel the phase noise and the frequency offset simultaneously with the demodulation.
  • the present invention transmits a complementary signal that can obtain a clock signal for demodulating a received signal in a receiver with a polarization component orthogonal to the polarization component of the radio modulation signal. It is suggested that.
  • FIG. 1 shows a data signal (10) transmitted with a first polarization component and a complement transmitted with a second polarization component orthogonal to the first polarization component in Embodiment 1 of the present invention.
  • FIG. 11 is a signal diagram showing the appearance of a signal (11) and a clock signal (12) to be reproduced.
  • the present embodiment is a configuration according to claims 1, 2, 7, 12, 13, and 18 of the present invention.
  • FIG. 1 shows the case of BPSK (Binary Phase Shift Keying) modulation.
  • BPSK Binary Phase Shift Keying
  • FIG. 2 shows a configuration diagram of the transmitter (20) of the wireless communication system according to the present invention.
  • An information signal (21) to be transmitted is input to the transmitter (20), and a data signal (10) is first generated from the information signal (21) in a baseband signal processing device (22).
  • This processing is a processing that has been used before, and is mainly performed by the information signal (21). It is modulated by a predetermined digital modulation method (here, BPSK).
  • BPSK digital modulation method
  • the baseband signal processing device (22) when multiplied by the data signal (10), a clock signal or a divided signal of a clock that can be easily generated is obtained. Generate a signal (11). The generation can be realized at high speed and simply by simple signal processing.
  • the local oscillation signal from one RF band local oscillator (23) is input to the mixers (24) and (24), and the data signal (10) and the auxiliary signal (11) are increased from the baseband to the millimeter wave band. Comparing.
  • the signal is converted into a radio modulation signal through the band pass filters (25) and (25), and is amplified by the amplifiers (26) and (26).
  • Fig. 3 shows the first form of the receiver.
  • the amplifier (34) After the received signal is unified to the same polarization component by the polarization converter (33), the amplifier (34) (
  • Each is amplified by 34) and passes through a band pass filter (35) (35).
  • the received signal from the V-polarized antenna (31) is branched after the band pass filter (35), and on the other hand, a synchronous detection circuit (37) that receives the local oscillation signal from the RF band local oscillator (36) In step 37), synchronous detection using homodyne detection or heterodyne detection is performed. As a result, it is converted into a baseband signal (data signal) (10 ').
  • the other branched signal is input to a mixer (38), which generates a product component with the received signal from the H-polarized antenna (32) which is also input, and passes a low-pass filter (39). After that, the clock signal (11 ') is reproduced. [0047]
  • the baseband signal (10,) and the clock signal (11,) generated in this way are input to the baseband signal processing device (40), and the information transmitted from the detected baseband signal (10 ') is transmitted. Demodulate the broadcast signal.
  • the clock signal can be instantaneously reproduced on the receiving side, so that the time for inserting the clock for synchronization is substantially unnecessary, and the preamble length, which conventionally required a sufficient time, is unnecessary. Alternatively, it can be made very short, which contributes to the improvement of transmission efficiency.
  • the receiver can be simplified and the cost can be reduced.
  • FIG. 4 shows a second embodiment of the receiver (30a). The same components as those in the first embodiment will be described using the same reference numerals.
  • an antenna (41) for receiving the 45-degree polarized wave is provided.
  • the 45-degree polarization antenna (41) is a linear polarization antenna having a 45-degree inclination, and receives both the V-polarization component and the H-polarization component.
  • the received signal from the V-polarized antenna (31) passes through a polarization converter (33), an amplifier (34), a bandpass filter (35) and a local oscillator (36) as in the first embodiment.
  • the baseband signal (10 ') is synchronously detected by the synchronous detection circuit (37) which receives the local oscillation signal from the input.
  • the baseband signal (10 ') is input to a baseband signal processor (40).
  • the received signal from the 45-degree polarization antenna (41) is converted in polarization by the polarization converter (33) and then amplified by the amplifier (34) to be filtered by the bandpass filter (35). Pass.
  • V polarization component and H polarization component are already mixed and input, they are multiplied by the square detection circuit (42), and the low-pass filter (39) is added. Then, the clock signal (11 ') is reproduced.
  • the clock signal (11 ') is also input to the baseband signal processing device (40), and the information signal can be demodulated as in the first embodiment.
  • a receiver according to the present invention in addition to the configuration using a synchronous detection circuit as in the first and second embodiments, a third embodiment as shown in FIG. 5 and a fourth embodiment as shown in FIG. To delay detection Periodic detection can also be used.
  • a delay detection circuit is provided instead of the synchronous detection circuit (37) shown in FIG. 3 and the local oscillator (36) input thereto, and a baseband signal is obtained by delay detection.
  • the present configuration it is possible to prevent frequency offset due to synchronous detection and signal quality deterioration due to phase noise. Therefore, in addition to the advantage that the frequency stability is high, the cost of the receiver can be suppressed because the RF band local oscillator is not used.
  • the configuration shown in FIG. 6 uses a linearly polarized antenna (41) having a 45-degree inclination similarly to the configuration shown in FIG. 4, and mixes V-polarized and H-polarized components to input. By doing so, this is detected by the square-law detection circuit (42), while the received signal from the V-polarized antenna (31) obtains a baseband signal by differential detection.
  • This configuration can also achieve the same effects as the third embodiment.
  • the data signal has four phases,
  • the baseband signal processing device (22) In the same configuration as the transmitter (20) shown in FIG. 2, the baseband signal processing device (22) generates a data signal (60) from the information signal (21).
  • the baseband signal processing device (22) generates a complementary signal (61) from which a clock signal is obtained when multiplied with the data signal (10).
  • the generation can be realized at high speed and simply by simple signal processing.
  • phase of the data signal (60) does not change (70)
  • the phase of the complementary signal (61) shifts by ⁇ from the phase of the data signal (60). If the phase of the data signal (60) changes by ⁇ (71), do not change the phase of the complementary signal (61).
  • phase of the data signal (60) is advanced by ⁇ / 2 or delayed by ⁇ / 2, and the phase of the data signal (60) and the phase of the complementary signal (61) are the same in the previous symbol At (72), the phase of the data signal (60) is shifted by ⁇ . Conversely, the data signal (60 ) If the phase of the complementary signal (61) is opposite to the phase of the complementary signal (61), the phase is the same as the phase of the data signal (60).
  • the data signal (60) and the auxiliary signal (61) generated in this way can easily obtain a clock signal (62) by a multiplying process in a receiver.
  • the transmitter transmits data so that a clock signal (62) having a constant amplitude as shown in the signal diagram of FIG. 7 can be obtained. It is possible to perform control to give an amplitude to the complementary signal (a wireless modulation signal modulated by the complementary signal) so that the amplitude becomes constant when multiplied with the signal (60). This process is performed in conjunction with the process of determining the amplitude of the data signal (60) in the baseband signal processing device (22). This configuration is extremely effective as a method for easily obtaining a clock signal having a constant amplitude.
  • the complementary signal is not used only for the purpose of clock recovery, and is also used for synchronous detection of the signal as described in claim 6. Suggest to do.
  • This configuration is a technology that has advanced the configuration proposed by the present inventors in Patent Document 1 to transmit an unmodulated carrier with the other polarization component, and a complementary signal whose conventional proposal is always cos cot Is shifted by cos ⁇ t and ⁇ cos ⁇ t.
  • the transmitter is the same as the configuration shown in FIG. 2, and the receiver is configured as shown in FIG.
  • the same components as those in FIG. 3 are denoted by the same reference numerals.
  • the antennas (31) and (32) that receive only the respective polarization directions use the V polarization and H Receive the polarization component.
  • the received signal is unified into equal polarization components by the polarization converter (33), and then amplified by the amplifiers (34) and (34), respectively, and passes through the bandpass filters (35) and (35).
  • the received signal from the V-polarized antenna (31) is split after the band pass filter (35), one is to the mixer (90) that detects the I component of the baseband signal, and the other is to the Q of the baseband signal.
  • the component is input to a mixer (91) that detects the component.
  • the complementary signal (radio modulated signal modulated by the complementary signal) from the H-polarized antenna (32) is branched into three systems, one is to the mixer (90) that detects the I component of the baseband signal, and the other is to the One is that the phase of the signal is shifted by ⁇ / 2 by the phase shifter (92) and then input to the mixer (91) that detects the Q component of the baseband signal.
  • the above signal processing corresponds to quadrature detection, and the frequency stability and phase noise characteristics of both V-polarized and ⁇ -polarized signals are completely correlated (see Patent Document 1 above).
  • quadrature detecting the data signal with the signal it is possible to obtain a baseband signal of the I component and the Q component, which is free from the frequency stability and the phase noise characteristic of the wireless carrier.
  • the polarity of the complementary signal is inverted for each symbol, so that the demodulated IQ signal also has its polarity inverted for each symbol.
  • the baseband signal processing device demodulation circuit (93) performs signal processing, and at the same time, the absolute phase cannot be determined. You can also send a signal.
  • the last branch of the branched complementary signal is subjected to delay detection (94) at the symbol rate ⁇ , so that the clock signal is recovered.
  • the baseband signal (I) (98), baseband signal (Q) (99), and clock signal (100) are reproduced through the low-pass filter (95) (96) (97), and the baseband signal processing device Input to (93), the information signal is demodulated.
  • a transmitter and a receiver are provided with an arithmetic unit (arithmetic processor) to achieve the same effect. You can also. Book Configurations according to claims 3, 4, 14, and 15 of the invention will be described.
  • FIG. 10 shows a signal diagram in the fourth embodiment
  • FIG. 11 shows a configuration of a transmitter
  • FIG. 12 shows a configuration of a receiver.
  • an exclusive OR (ExOR) is given as an example of the logical operation, but any logical operation can be used.
  • a complementary signal (111) is generated which generates a clock signal or a frequency-divided signal of a clock which can be easily generated.
  • the arithmetic processing unit required for this configuration is provided in the baseband signal processing device (121), and can be implemented by using a known simple arithmetic processing unit.
  • the receiver receives signals from the V-polarized component antenna (130) and the H-polarized component antenna (131) via the amplifiers (132) and (132) via the envelope detection circuit (133). Detect at (133).
  • the detection signal from the V polarization is demodulated to an information signal (137) using a clock signal.
  • the clock signal is required by the operation processing unit (135) of the baseband signal processing device (demodulation circuit) (134) by the exclusive OR of the detection signal from the V polarization and the detection signal from the H polarization. A half cycle of the clock can be reproduced.
  • the clock signal is reproduced by combining the delay circuit (136) and is used for demodulation in the demodulation circuit (134).
  • the present invention is to transmit a second wireless modulation signal modulated by a complementary signal together with a first wireless modulation signal modulated by transmission information by orthogonal polarization components. Under the environment, it is not always necessary to continue to transmit the complementary signal with the second wireless modulation signal after the clock signal synchronized with the information symbol is obtained on the receiver side.
  • Claim 11 and 22 are technologies relating to the configuration.
  • the second information signal (21') to be transmitted is input, and A second data signal is generated from the second information signal by the band signal processing device (22).
  • a flag bit indicating that transmission of the information signal is started also in the second wireless modulation signal is transmitted in the first wireless modulation signal. I do.
  • FIG. 13 is a signal diagram of the first wireless modulation signal and the second wireless modulation signal.
  • a complementary signal are sent out so that the clock signal can be reproduced from the product of these signals.
  • a second information signal is transmitted instead of the complementary signal, and two-channel signal transmission (171) is performed.
  • the flag bit (172) is extremely short in the drawing for the sake of convenience of explanation. Actually, it needs to be different from normal data bits, and needs to be a longer bit string.
  • the invention according to the fifth embodiment is different from the receiver (30 ′) in FIG. 15 in which the mode of the receiver in FIG.
  • the receiver demodulates the first wireless signal using the output of the clock recovery circuit (190), and detects a flag bit in the second wireless signal that indicates that information transmission will start. Thereafter, the second wireless signal is also demodulated using the output of the clock recovery circuit (190) to obtain a second information signal.
  • the present invention can take various aspects as in the above-described embodiments 115.
  • the signal processing of the embodiment 13 and the logical operation of the embodiment 4 can be arbitrarily changed and used.
  • FIG. 16 shows a signal diagram of a 1/2 frequency-divided signal and a necessary clock signal
  • FIG. 17 shows a configuration example of a circuit for obtaining a required clock signal from the frequency-divided signal of the same clock. That is, when a 1/2 frequency-divided signal (140) of a clock, which is a bipolar signal, is input, the signal is first converted to a general binary digital signal from the bipolar signal (_1, 1) by a baseband conversion circuit (141). Is converted to (0, 1). Next, this output is branched into two, one of which is delayed by T / 2 in a delay circuit (142) and then input to an exclusive OR or OR circuit (143).
  • a 1/2 frequency-divided signal (140) of a clock which is a bipolar signal
  • a baseband conversion circuit 141
  • this output is branched into two, one of which is delayed by T / 2 in a delay circuit (142) and then input to an exclusive OR or OR
  • the other clock signal is input to the exclusive OR or OR circuit (143) to generate a necessary clock as shown in FIG. 16 as an output.
  • these processes are generally performed by a digital processing circuit.
  • FIG. 18 is an example of an antenna according to an embodiment of the present invention that transmits and receives V polarization and H polarization.
  • this antenna (150) two independent signals to be transmitted with orthogonal polarization from two independent feeding terminals (151) and (152) are fed to one circular waveguide antenna (153) and By performing inter-synthesis, two orthogonally polarized signals can be transmitted and received by substantially one antenna.
  • a feed strip line sheet (156) on which two feed terminals (151), (152), and power strip lines (154), (155) are formed, is provided behind the circular waveguide antenna (153).
  • the reflection plate (157) is stuck immediately after that.
  • the strip lines are wired closely at an angle of 90 ° so that signals are supplied in the horizontal and vertical directions at the feeding point of the antenna (153), and the lines are formed up to the intersection. .
  • each of the two feed terminals (160) and (161) is branched on the way, and one strip line is electrically connected to the antenna when the feed direction to the antenna is 0, ⁇ / 2.
  • the feed signal is designed so that the phase advances by ⁇ / 2
  • the other strip line is arranged so that the feed direction is ⁇ , 3 ⁇ 2, and at the same time, the feed signal is shifted by ⁇ ⁇ 2 It is designed to delay the phase.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Superheterodyne Receivers (AREA)
  • Transmitters (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

La présente invention concerne un procédé et un système de communication sans fil permettant la mise en oeuvre d'une communication par rafales haut débit même sur une bande de fréquence élevée et permettant également la réalisation d'un système d'accès sans fil ultra-rapide. Un émetteur transmet, dans un premier sens de polarisation, un premier signal radio modulé tel qu'il est modulé avec les informations transmises, pendant qu'il transmet, dans un second sens de polarisation orthogonal par rapport au premier sens de polarisation, un second signal radio modulé tel qu'il est modulé avec un signal complémentaire et à partir duquel des signaux répartis en fréquence d'horloge doivent être produits par soumission des premiers et des seconds signaux radio modulés à un traitement de signaux prédéterminé. Un récepteur reproduit le signal d'horloge en soumettant les premiers et seconds signaux radio modulés à un traitement de signaux prédéterminés, puis il utilise le signal d'horloge pour démoduler le premier signal radio modulé détecté de manière synchrone ou asynchrone.
PCT/JP2004/006441 2004-05-13 2004-05-13 Procede de communication sans fil et systeme de communication sans fil WO2005112380A1 (fr)

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JP2006513467A JP4448942B2 (ja) 2004-05-13 2004-05-13 無線通信方法及び無線通信システム
PCT/JP2004/006441 WO2005112380A1 (fr) 2004-05-13 2004-05-13 Procede de communication sans fil et systeme de communication sans fil

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PCT/JP2004/006441 WO2005112380A1 (fr) 2004-05-13 2004-05-13 Procede de communication sans fil et systeme de communication sans fil

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JP2012060463A (ja) * 2010-09-09 2012-03-22 Sony Corp 信号伝送装置、電子機器、基準信号出力装置、通信装置、基準信号受信装置、及び、信号伝送方法

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JPS58129854A (ja) * 1982-01-28 1983-08-03 Fujitsu Ltd 空間多値変調方式
JPS6477235A (en) * 1987-09-18 1989-03-23 Fujitsu Ltd Compensating device for interference between cross-polarized waves
JP2000174838A (ja) * 1998-12-09 2000-06-23 Hitachi Ulsi Systems Co Ltd データ受信装置
JP2000253002A (ja) * 1999-02-25 2000-09-14 Hittsu Kenkyusho:Kk 光無線送受信機

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JPS58129854A (ja) * 1982-01-28 1983-08-03 Fujitsu Ltd 空間多値変調方式
JPS6477235A (en) * 1987-09-18 1989-03-23 Fujitsu Ltd Compensating device for interference between cross-polarized waves
JP2000174838A (ja) * 1998-12-09 2000-06-23 Hitachi Ulsi Systems Co Ltd データ受信装置
JP2000253002A (ja) * 1999-02-25 2000-09-14 Hittsu Kenkyusho:Kk 光無線送受信機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012060463A (ja) * 2010-09-09 2012-03-22 Sony Corp 信号伝送装置、電子機器、基準信号出力装置、通信装置、基準信号受信装置、及び、信号伝送方法

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