WO2004025863A1 - 周波数ホッピング無線通信方法及びシステム - Google Patents
周波数ホッピング無線通信方法及びシステム Download PDFInfo
- Publication number
- WO2004025863A1 WO2004025863A1 PCT/JP2002/009327 JP0209327W WO2004025863A1 WO 2004025863 A1 WO2004025863 A1 WO 2004025863A1 JP 0209327 W JP0209327 W JP 0209327W WO 2004025863 A1 WO2004025863 A1 WO 2004025863A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- local oscillation
- wireless communication
- frequency band
- intermediate frequency
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
- H04B1/7156—Arrangements for sequence synchronisation
Definitions
- the present invention relates to a frequency hopping wireless communication method and system for performing wireless communication using a frequency hopping scheme in a very high frequency region such as a millimeter wave band.
- Fig. 6 and Fig. 7 show the configuration of the transmitter and the configuration of the receiver of the wireless communication system when a general frequency hobbing method is used.
- a signal obtained from an intermediate frequency (IF) band modulator 1 to which transmission data is input and an output of a hopping synthesizer 3 controlled by a signal from a hopping pattern generator 2 are input to a mixer 4.
- IF intermediate frequency
- a hopping synthesizer 3 controlled by a signal from a hopping pattern generator 2 are input to a mixer 4.
- a frequency-hopped radio modulation signal is obtained.
- This is transmitted from the transmitting antenna 6 after the unnecessary wave component is removed by the bandpass filter 5.
- the received signal is received by the receiving antenna 7 and amplified by the amplifier 8, and then unnecessary wave components are removed by the wide-band bandpass filter 9, and this signal and the frequency corresponding to the desired received signal are removed.
- the output signal of the hopping synthesizer 12 controlled by the hopping pattern generator 11 that generates a hopping pattern is input to the mixer 10, which passes through the bandpass filter 13, and is a fixed IF that does not hop. Obtain frequency modulated signal. This signal is input to the IF band demodulator 14 and the data is demodulated.
- FIG. 7 also shows a configuration for acquiring synchronization of the hopping frequency in the receiver. That is, the output of the bandpass filter 13 further passes through a signal detection (envelope detection) unit 15 and an integrator 16, and this is compared with a threshold level by a threshold comparator 17 and is sent to a phase controller 18. Input and the output The generation phase of the subbing synthesizer 12 is controlled.
- the output of the hopping synthesizer used in the transmitter and the output of the hopping synthesizer used in the receiver are always This is a relationship of a predetermined frequency difference, and it is required that the time variation of the phase difference is small. For this reason, a hopping synthesizer to be used in the transmitter and receiver needs to have excellent frequency stability and low phase noise, and at the same time, to respond at high speed.
- the dielectric resonator or PLL (Phase Lock Loop) circuit is used to stabilize and reduce noise.
- the operating frequency becomes very high (for example, a millimeter wave band of 30 GHz or more), it becomes more difficult to realize a hopping synthesizer with high frequency stability and low phase noise, and the manufacturing cost increases.
- the modulated signal to be transmitted is a narrowband modulated multicarrier signal or OFDM (Orthogonal Frequency Division Multiplexing) signal
- the hopping synthesizer between the transmitter and the receiver is required to have very accurate frequency synchronization.
- the frequency changes in a burst manner it is necessary to respond quickly to this.
- the present invention has been made in view of such circumstances, and has as its object to construct a frequency hopping wireless system that is not affected by the frequency instability of a local oscillator or a hopping synthesizer for frequency conversion.
- a frequency hopping wireless communication method and system includes: a transmitting unit that generates a wireless modulation signal by multiplying an intermediate frequency band modulation signal from an intermediate frequency band modulation / demodulation unit with a local oscillation signal; A receiving unit for generating a down-compensated intermediate frequency band demodulated signal by multiplying the local oscillation signal and demodulating the signal in the intermediate frequency band modulating / demodulating unit, and a plurality of wireless communication terminals each having Perform communication.
- Either a single transmitting station for transmitting only the reference local oscillation signal is provided, or one of the plurality of wireless communication terminals transmits a local oscillation signal to be used as a base station or a master station by a radio modulation signal. And send it together.
- Each of the plurality of wireless communication terminals modulates a transmission signal and demodulates a reception signal using a frequency hopping method in an intermediate frequency band modulation / demodulation unit.
- each of the plurality of wireless communication terminals receives the reference local oscillation signal from the transmitting station, amplifies and band-filters the signal, reproduces the reference local oscillation signal using an injection locked oscillator or an amplifier, and transmits the signal to the transmission function and They communicate with each other using local oscillation signals used in the reception function.
- the transmitting unit up-compares the modulated signal generated in the intermediate frequency band to the wireless frequency band with a local oscillation signal functioning as a hopping synthesizer.
- the single-sideband or double-sideband frequency-hopping radio modulation signal obtained thereby and the local oscillation signal used for the up-conversion are simultaneously transmitted.
- the receiving unit down-converts the received signal to the first intermediate frequency band signal using a local oscillation signal that is frequency-hobbed in a pattern obtained by adding a fixed frequency offset to the frequency hopping pattern corresponding to the desired received wave.
- FIG. 1 is a diagram showing a first embodiment.
- FIG. 2 is a diagram showing a spectrum transmitted and received in the first embodiment.
- FIG. 3 is a diagram showing a configuration of a transmitter according to the second embodiment.
- FIG. 4 is a diagram showing a configuration of a receiver according to the second embodiment.
- FIG. 5 is a diagram showing spectra transmitted and received in the second embodiment.
- FIG. 6 is a diagram showing a configuration of a conventional frequency hobbing type transmitter.
- FIG. 7 is a diagram showing a configuration of a conventional frequency hobbing system receiver. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 shows a configuration of a wireless communication system according to a first embodiment of the present invention
- FIG. 2 shows a transition of a signal spectrum transmitted and received by each station.
- FIG. 1 (C) composed of one reference signal station IS and a plurality of terminal stations 2 3.
- the reference signal station 19 amplifies the reference local oscillation signal generated by the reference local oscillator 20 with the amplifier 21, and then radiates the signal from the antenna 22 to the service zone.
- Each terminal station 23 receives this through the receiving antenna 24 as shown in FIG. 1 (A).
- the received signal is amplified by an amplifier 25, and a part of the signal is branched.
- a bandpass filter 26 which is input to an injection locked oscillator or an amplifier 27.
- a local oscillation signal synchronized with the reference local oscillation signal emitted from the reference signal station 19 is obtained.
- the terminal station 23 splits the obtained local oscillation signal into two, and inputs one into the receiving frequency converter (mixer) 28 and the other into the transmitting frequency converter (mixer) 29.
- the mixers 28 and 29 of the terminal station 23 are connected to an intermediate frequency (IF) band modulation / demodulation circuit 31 of an FH system for demodulating and generating a frequency hopping (FH) signal, respectively.
- IF intermediate frequency
- the IF band FH modulated signal which is the output of 8, is filtered by a bandpass filter 30 to remove unnecessary wave components, and then input to an intermediate frequency (IF) band modulation / demodulation circuit 31 of the FH system to obtain desired data.
- IF band FH modulated signal obtained from the intermediate frequency (IF) band modulation / demodulation circuit 31 of the FH system is input to a mixer 29, where the frequency is converted to a radio frequency band, and an unnecessary wave is further processed by a bandpass filter 32. After the signal is removed, the signal is amplified by the amplifier 33 and transmitted from the transmitting antenna 34. .
- the configuration itself of the transceiver included in the IF band modulation / demodulation circuit 31 of the ra system is the same as that of the conventional frequency hopping system shown in FIGS. 6 and 7.
- the frequency offset and phase noise occurring in the radio signal are sufficiently removed by the circuit before being input to the IF band modulation / demodulation circuit 31 of the FH system.
- the IF band modulation / demodulation circuit 31 of the FH method a circuit having a response speed that is not so high or excellent in synchronization capturing ability is not required, so that a conventional frequency hobbing method circuit can be used.
- FIG. 2 shows how a signal spectrum transmitted and received in the first embodiment changes with time. While the spectrum (dark black portion) always transmitted from the reference signal station 19 does not change its frequency with time, the radio signal transmitted by being up-com- plied using this reference local oscillation signal is transmitted. The frequency of the tonal signal (light black) hops over time.
- a station that transmits only the reference local oscillation signal is provided separately from the terminal.
- a system in which the transmission antenna power per transmission station is limited is limited. In this case, more transmission power is allocated to the reference local oscillation signal, so that the communication area can be expanded.
- the reference local oscillation signal transmitting station can also have a terminal function or a function of transmitting and receiving a signal. That is, one of the terminal groups becomes a master station, transmits a local oscillation signal used by the same station to a space as a reference local oscillation signal, and each of the other wireless terminals receives the reference oscillation signal. After amplification and band-pass filtering, a local oscillation signal synchronized with a reference local oscillation signal at an appropriate level is reproduced by an injection locked oscillator, and this can be used as a local oscillation signal for frequency conversion used in a transmission / reception function.
- the configuration since the configuration is such that the reference local oscillation signal is transmitted, the configuration is not affected by the frequency instability of the local oscillator for frequency conversion. This makes it possible to construct a frequency hobbing wireless system that is not affected by the frequency instability of the local oscillator for frequency conversion.
- FIGS. 3 and 4 show a wireless communication system according to a second embodiment of the present invention.
- the transmitter configuration and the receiver configuration of the system are shown, and Fig. 5 shows the transition of the signal spectrum transmitted and received between terminals at this time.
- the present invention can be applied to communication between a plurality of wireless terminals.
- Each wireless terminal includes a transmitting unit having the configuration shown in FIG. 3 and a receiving unit having the configuration shown in FIG.
- the transmitter illustrated in FIG. 3 is capable of performing bidirectional communication.
- the transmitter generates an IF band modulated signal using an IF band modulator 35, and the hopping synthesizer 3 controlled by a hopping pattern generator 37.
- this output usually includes the output signal of a hopping synthesizer used as a local oscillation signal, in addition to the double-sideband radio signal whose frequency has been converted as shown in FIG. After these signals are amplified by the amplifier 39, they are transmitted from the antenna 40.
- an image-reduction type mixer it is possible to obtain a frequency-converted single-sideband radio signal and an output signal of a hopping synthesizer used as a local oscillation signal.
- the signal received by the receiving antenna 41 is amplified by the amplifier 42, the unnecessary wave is removed by the bandpass filter 43, and the signal is input to the mixer 44. Further, the output signal of a hobbing synthesizer 47, which is controlled by a signal obtained by adding a fixed frequency offset signal by an offset signal generator 46 to a hopping pattern generator 45, is input to the mixer 44. Result Mixer 44 The output of the radio frequency band signal is a signal that is down-complied to the first IF band without frequency hopping corresponding to the offset signal while maintaining its relative spectral relationship. Appears.
- the signal is square-detected by the squarer 49, and the modulated signal in the intermediate frequency band used at the transmission source is reproduced.
- This signal includes up-conversion and down-conversion to the millimeter wave band in the FH system. In principle, deterioration of frequency offset ⁇ phase noise due to conversion does not occur. This is because the local oscillation signal component and the radio modulation signal component that are input to the squarer and down-converted to the IF band have the same frequency offset and phase noise component, and this is canceled by the square detection. Because it is done. Therefore, desired reception data can be obtained by inputting the obtained IF band signal to the IF band demodulator 50.
- the output of the squarer 49 further passes through a signal detection (envelope detection) unit 51 and an integrator 52, which is compared with a threshold level by a threshold comparator 53 to obtain a phase controller. It is input to 54, and its output further controls the generation phase of the hobbing synthesizer 47.
- a frequency hopping wireless system which is not affected by the frequency instability of a local oscillator for frequency conversion or a hopping synthesizer. This makes it possible to apply the frequency hopping method in very high frequency regions such as the millimeter wave band, which was difficult.
- a high-stability local oscillator or hobbing synthesizer is not required, low-cost and compact terminals and systems can be constructed.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
- Transmitters (AREA)
- Mobile Radio Communication Systems (AREA)
- Superheterodyne Receivers (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/525,966 US7804883B2 (en) | 2002-09-12 | 2002-09-12 | Method and system for frequency hopping radio communication |
DE60233173T DE60233173D1 (de) | 2002-09-12 | 2002-09-12 | Verfahren und System zur Frequenzsprung-Funkkommunikation |
EP02763020A EP1551111B1 (en) | 2002-09-12 | 2002-09-12 | Method and system for frequency hopping radio communication |
PCT/JP2002/009327 WO2004025863A1 (ja) | 2002-09-12 | 2002-09-12 | 周波数ホッピング無線通信方法及びシステム |
CNB028295765A CN100367683C (zh) | 2002-09-12 | 2002-09-12 | 跳频无线通信方法及系统 |
JP2004535840A JP3937023B2 (ja) | 2002-09-12 | 2002-09-12 | 周波数ホッピング無線通信方法及びシステム |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2002/009327 WO2004025863A1 (ja) | 2002-09-12 | 2002-09-12 | 周波数ホッピング無線通信方法及びシステム |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004025863A1 true WO2004025863A1 (ja) | 2004-03-25 |
Family
ID=31986092
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/009327 WO2004025863A1 (ja) | 2002-09-12 | 2002-09-12 | 周波数ホッピング無線通信方法及びシステム |
Country Status (6)
Country | Link |
---|---|
US (1) | US7804883B2 (ja) |
EP (1) | EP1551111B1 (ja) |
JP (1) | JP3937023B2 (ja) |
CN (1) | CN100367683C (ja) |
DE (1) | DE60233173D1 (ja) |
WO (1) | WO2004025863A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116015352A (zh) * | 2022-12-27 | 2023-04-25 | 华中科技大学 | 一种基于Delta-sigma调制的跳频信号发生装置和方法 |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3838230B2 (ja) * | 2003-08-19 | 2006-10-25 | ソニー株式会社 | 伝搬路特性推定システム及び伝搬路特性推定方法、並びに通信装置及び通信方法 |
US20050093584A1 (en) * | 2003-10-31 | 2005-05-05 | Staccato Communications | Fast-hopping frequency synthesizer |
US7940830B2 (en) * | 2007-09-27 | 2011-05-10 | Infineon Technologies Ag | Fast hopping frequency synthesizer |
US20090268796A1 (en) * | 2008-04-29 | 2009-10-29 | Hany Shenouda | Transceiver architecture |
CN102255630A (zh) * | 2011-01-14 | 2011-11-23 | 苏州英诺迅科技有限公司 | WiFi跳频远距离传输模块 |
CN102647202B (zh) * | 2012-03-31 | 2014-06-18 | 电子科技大学 | 一种基于mdfh的数据传输方法及其系统 |
DE102017206236A1 (de) * | 2017-04-11 | 2018-10-11 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Spezifische hoppingmuster für telegram-splitting |
CN107835036B (zh) * | 2017-09-15 | 2020-03-31 | 西南电子技术研究所(中国电子科技集团公司第十研究所) | 非合作跳频信号破解方法 |
CN107465463A (zh) * | 2017-09-18 | 2017-12-12 | 贵州航天天马机电科技有限公司 | 一种抗干扰装置及方法 |
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JP2000332678A (ja) * | 1999-05-21 | 2000-11-30 | Kokusai Electric Co Ltd | 同期維持方法及び無線装置及び無線通信システム |
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2002
- 2002-09-12 JP JP2004535840A patent/JP3937023B2/ja not_active Expired - Lifetime
- 2002-09-12 WO PCT/JP2002/009327 patent/WO2004025863A1/ja active Application Filing
- 2002-09-12 US US10/525,966 patent/US7804883B2/en not_active Expired - Fee Related
- 2002-09-12 CN CNB028295765A patent/CN100367683C/zh not_active Expired - Fee Related
- 2002-09-12 DE DE60233173T patent/DE60233173D1/de not_active Expired - Lifetime
- 2002-09-12 EP EP02763020A patent/EP1551111B1/en not_active Expired - Lifetime
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YOZO SHOJI ET AL.: "Milli-ha Ad Hoc musen access system-(1) kaihatsu no gaiyo-", 2002 NEN THE INSTITUTE OF ELECTRONICS, INFORMATION AND COMMUNICATION ENGINEERS SOGO TAIKAI, B-5-332, 7 March 2002 (2002-03-07), pages 783, XP002975830 * |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116015352A (zh) * | 2022-12-27 | 2023-04-25 | 华中科技大学 | 一种基于Delta-sigma调制的跳频信号发生装置和方法 |
CN116015352B (zh) * | 2022-12-27 | 2024-05-14 | 华中科技大学 | 一种基于Delta-sigma调制的跳频信号发生装置和方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1551111B1 (en) | 2009-07-29 |
DE60233173D1 (de) | 2009-09-10 |
CN100367683C (zh) | 2008-02-06 |
JPWO2004025863A1 (ja) | 2006-01-12 |
JP3937023B2 (ja) | 2007-06-27 |
US20050249265A1 (en) | 2005-11-10 |
CN1669239A (zh) | 2005-09-14 |
EP1551111A1 (en) | 2005-07-06 |
US7804883B2 (en) | 2010-09-28 |
EP1551111A4 (en) | 2007-11-14 |
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