Spread spectrum correlation using saw device

Details Spread spectrum correlation using saw device Spread spectrum correlation using saw device

1995-02-03

1998-07-21

Chin, Wellington

Pulse or digital communications

Repeaters

Testing

375208, 375343, H04L 2728

Patent

active

057844038

ABSTRACT:
A technique is provided using a SAW device for correlating to a plurality of different chip code sequences, such as M different chip code sequences, using fewer than M individual SAW correlators. A received signal is provided to a SAW correlator capable of recognizing a plurality of different chip code sequences. The SAW correlator is pre-programmed so as to recognize each different chip code sequence at a different frequency. The received signal is given a programmably selected frequency offset from the center frequency of the received signal (or a downconverted version thereof) and applied to the SAW correlator. The SAW correlator correlates for the particular chip code sequence at the offset frequency. The output of the SAW correlator is given an opposite frequency offset and filtered with a bandpass filter to generate a correlator output at the designated center frequency. In one embodiment, a comb generator signal is multiplied with the received signal to provide a plurality of signals at offset frequencies. The plurality of offset signals are provided to the SAW correlator which simultaneously correlates for all possible chip code sequences. The output of the SAW is connected to a plurality of bandpass filters, each attuned to one of the offset frequencies generated by the comb generator.

REFERENCES:
patent: 3978436 (1976-08-01), Casanova et al.
patent: 4021898 (1977-05-01), Willis et al.
patent: 4100498 (1978-07-01), Alsup et al.
patent: 4131484 (1978-12-01), Caruso et al.
patent: 4164628 (1979-08-01), Ward et al.
patent: 4217563 (1980-08-01), Vale
patent: 4247942 (1981-01-01), Hauer
patent: 4280222 (1981-07-01), Flower et al.
patent: 4301530 (1981-11-01), Gutleber
patent: 4314393 (1982-02-01), Wakatsuki et al.
patent: 4327438 (1982-04-01), Baier et al.
patent: 4338579 (1982-07-01), Rhodes
patent: 4409593 (1983-10-01), Bose
patent: 4418393 (1983-11-01), Zachiele
patent: 4423519 (1983-12-01), Bennett et al.
patent: 4435821 (1984-03-01), Ito et al.
patent: 4445256 (1984-05-01), Huguenin et al.
patent: 4470138 (1984-09-01), Gutleber
patent: 4479226 (1984-10-01), Prabhu et al.
patent: 4481640 (1984-11-01), Chow et al.
patent: 4517679 (1985-05-01), Clark et al.
patent: 4550414 (1985-10-01), Guinon et al.
patent: 4561089 (1985-12-01), Rouse et al.
patent: 4562370 (1985-12-01), Dach
patent: 4567588 (1986-01-01), Jerrim
patent: 4583048 (1986-04-01), Gumacos et al.
patent: 4587662 (1986-05-01), Langewellpott
patent: 4601047 (1986-07-01), Horwitz et al.
patent: 4641317 (1987-02-01), Fullerton
patent: 4642505 (1987-02-01), Arvanitis
patent: 4647863 (1987-03-01), Skudera et al.
patent: 4649549 (1987-03-01), Halpern et al.
patent: 4653069 (1987-03-01), Roeder
patent: 4665404 (1987-05-01), Christy et al.
patent: 4672254 (1987-06-01), Dolat et al.
patent: 4688210 (1987-08-01), Eizenhofer et al.
patent: 4691326 (1987-09-01), Tauchiya
patent: 4701904 (1987-10-01), Darcie
patent: 4707839 (1987-11-01), Andren et al.
patent: 4730340 (1988-03-01), Frazier
patent: 4745378 (1988-05-01), Niitsuma
patent: 4754453 (1988-06-01), Eizenhofer
patent: 4759034 (1988-07-01), Nagazumi
patent: 4774715 (1988-09-01), Messenger
patent: 4811357 (1989-03-01), Betts
patent: 4815106 (1989-03-01), Propp et al.
patent: 4894842 (1990-01-01), Brockhoven et al.
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 4905221 (1990-02-01), Ichiyoshi
patent: 4908837 (1990-03-01), Mori et al.
patent: 4965759 (1990-10-01), Uchida et al.
patent: 4979186 (1990-12-01), Fullerton
patent: 4984247 (1991-01-01), Kaufmann et al.
patent: 5016255 (1991-05-01), Dixon et al.
patent: 5022047 (1991-06-01), Dixon et al.
patent: 5029184 (1991-07-01), Andren et al.
patent: 5048015 (1991-09-01), Zilberfarb
patent: 5063560 (1991-11-01), Yerbury
patent: 5063571 (1991-11-01), Vancraeynest
patent: 5066957 (1991-11-01), Mizuno et al.
patent: 5081642 (1992-01-01), O'Clock et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5111535 (1992-05-01), Tokunaga
patent: 5146471 (1992-09-01), Cowart
patent: 5157686 (1992-10-01), Omura et al.
patent: 5166952 (1992-11-01), Omura et al.
patent: 5170412 (1992-12-01), Massey
patent: 5177767 (1993-01-01), Kato
patent: 5185610 (1993-02-01), Ward et al.
patent: 5202903 (1993-04-01), Okanoue
patent: 5210770 (1993-05-01), Rice
patent: 5216691 (1993-06-01), Kaufmann
patent: 5224120 (1993-06-01), Schilling
patent: 5253268 (1993-10-01), Omura et al.
patent: 5274665 (1993-12-01), Schilling
patent: 5276705 (1994-01-01), Higgins et al.
patent: 5293398 (1994-03-01), Hamao et al.
patent: 5313457 (1994-05-01), Hostetter et al.
patent: 5341396 (1994-08-01), Higgins et al.
patent: 5347284 (1994-09-01), Volpi et al.
patent: 5353300 (1994-10-01), Lee et al.
patent: 5353303 (1994-10-01), Walthall
patent: 5355389 (1994-10-01), O'Clock et al.
patent: 5400359 (1995-03-01), Hikoso et al.
patent: 5410568 (1995-04-01), Schilling
patent: 5414728 (1995-05-01), Zehavi
patent: 5414796 (1995-05-01), Jacobs et al.
patent: 5416797 (1995-05-01), Gilhousen et al.
patent: 5442662 (1995-08-01), Fukasawa et al.
patent: 5467367 (1995-11-01), Izumi et al.
patent: 5469469 (1995-11-01), Haines
patent: 5471497 (1995-11-01), Zehavi
patent: 5481533 (1996-01-01), Honig et al.
patent: 5488629 (1996-01-01), Takahashi et al.
patent: 5491726 (1996-02-01), Cheng et al.
patent: 5517518 (1996-05-01), Morson et al.
Dixon, Robert C., Spread Spectrum Systems, (J. Wiley & Sons, 2d Ed. 1984).
Ralph Eschenbach, Applications of Spread Spectrum Radio to Indoor Data Communications, Proceedings of the IEEE, 1982, pp. 34.5-1.
S. Nanayakkara, High Speed Receiver Designs Based on Surface Acoustic Wave Devices, Sixth International Conference On Digital Statellite Communications, Sep. 1983, pp. 16-22.
J.H. Collins & P.M. Grant,The Role of Surface Acoustic Wave Technology in Communication Systems, Ultrasonics, Mar. 1972, vol. 10, No. 2, pp. 59-71.
P.J. Hagon et al., A Programmable Surface Acoustic Wave Matched Filter for Phase-Coded Spread Spectrum Waveforms, IEEE Transactions on Microwave Theory and Techniques, Apr. 1973, vol. 21, No. 4, pp. 303-306.
Roger D. Colvin, Correlators And Convolvers Used In Spread Spectrum Systems, National Telecommunications Conference, Conference Record vol. 1 of 4, 1982, pp. 22.4.1-22.4.5.
Manfred G. Unkauf, Surface Wave Devices in Spread Spectrum Systems, Surface Wave Filters (Wiley 1977), pp. 477-509.
Colin K. Campbell, Applications of Surface Acoustice and Shallow Bulk Acoustic Wave Devices, Proceedings of the IEEE, Oct. 1989, pp. 1453-1484.
Dixon, Robert C. Spread Spectrum Systems with Commercial Applications (J. Wiley & Sons, 3d ed. 1994).
Cohen, Marvin N., "Pulse Compression in Pulsed Doppler Radar Systems," reprinted in Morris, Guy V., Airbourne Pulsed Doppler Radar, Chap. 8, pp. 123-155, 1988.
Smith, W. Richard, "SAW Filters For CPSM Spread Spectrum Communication", IEEE National Telecommunications Conference, pp. 22.1.1-22.1.6, Nov. 1980.
Rohling, Hermann et al., "Mismatched-Filter Design for Periodical Binary Phased Signals", IEEE Transactions On Aerospace and Electronic System, 25(6):890-897, Nov. 1989.

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