Pulse or digital communications – Repeaters – Testing
Patent
1994-03-21
1996-03-12
Cain, David C.
Pulse or digital communications
Repeaters
Testing
380 34, H04K 100
Patent
active
054992656
ABSTRACT:
An apparatus for decoding a received spread spectrum signal having a data signal modulated with a pseudo-noise code and transmitted as an RF spread spectrum signal. A first reference register holds a first pseudo-noise signal, a second reference register holds a second pseudo-noise signal, and a receive-register holds a received spread spectrum signal. A first modulo adder adds each chip of the received spread spectrum signal with each respective chip of the first pseudo-noise signal, thereby generating a first plurality of chip-comparison signals. A first summer adds the first plurality of chip-comparison signals, generating a first correlation signal. The comparator compares the correlation signal to an upper-threshold level and a lower-threshold level, and respectively generates a first data-symbol signal or a second data-symbol signal.
REFERENCES:
patent: 27738 (1893-08-01), Takamichi Honma et al.
patent: 3934203 (1976-01-01), Schiff
patent: 3978436 (1976-08-01), Alig et al.
patent: 4021898 (1977-05-01), Willis et al.
patent: 4051448 (1977-09-01), Coussot
patent: 4100498 (1978-07-01), Alsup et al.
patent: 4131484 (1978-12-01), Caruso et al.
patent: 4163944 (1979-08-01), Chambers et al.
patent: 4164628 (1979-08-01), Ward et al.
patent: 4217563 (1980-08-01), Vale
patent: 4222115 (1980-09-01), Cooper et al.
patent: 4247942 (1981-01-01), Hauer
patent: 4301530 (1981-11-01), Gutleber
patent: 4314393 (1982-02-01), Wakatsuki et al.
patent: 4355411 (1982-10-01), Reudink et al.
patent: 4418393 (1983-11-01), Zscheile, Jr.
patent: 4418425 (1983-11-01), Fennel, Jr. et al.
patent: 4432089 (1984-02-01), Wurzburg et al.
patent: 4445256 (1984-05-01), Huguenin et al.
patent: 4455651 (1984-06-01), Baran
patent: 4456793 (1984-06-01), Baker et al.
patent: 4481640 (1984-11-01), Chow et al.
patent: 4484028 (1984-11-01), Kelley et al.
patent: 4506372 (1985-03-01), Massey
patent: 4517679 (1985-05-01), Clark et al.
patent: 4525835 (1985-01-01), Vance et al.
patent: 4550414 (1985-10-01), Guinon et al.
patent: 4561089 (1985-12-01), Rouse et al.
patent: 4562370 (1985-12-01), Von Dach
patent: 4563774 (1986-01-01), Gloge
patent: 4567588 (1986-01-01), Jerrim
patent: 4569062 (1986-02-01), Dellande et al.
patent: 4587662 (1986-05-01), Langewellpott
patent: 4601047 (1986-07-01), Horwitz et al.
patent: 4606039 (1986-08-01), Nicolas et al.
patent: 4612637 (1986-09-01), Davis et al.
patent: 4621365 (1986-11-01), Chiu
patent: 4622854 (1986-11-01), Locke et al.
patent: 4630283 (1986-12-01), Schiff
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: 4660164 (1987-04-01), Leibowitz
patent: 4672254 (1987-06-01), Dolat et al.
patent: 4672658 (1987-06-01), Kavehrad et al.
patent: 4680785 (1987-07-01), Akiyama et al.
patent: 4691326 (1987-09-01), Tsuchiya
patent: 4701904 (1987-10-01), Darcie
patent: 4703474 (1987-10-01), Foschini et al.
patent: 4707839 (1987-11-01), Andren et al.
patent: 4718080 (1988-01-01), Serrano
patent: 4724435 (1988-02-01), Moses et al.
patent: 4742512 (1988-05-01), Akashi et al.
patent: 4745378 (1988-05-01), Niitsuma et al.
patent: 4754453 (1988-06-01), Eizenhofer
patent: 4754473 (1988-06-01), Edwards
patent: 4759034 (1988-07-01), Nagazumi
patent: 4759078 (1988-07-01), Schiller
patent: 4769812 (1988-09-01), Shimizu
patent: 4787093 (1988-11-01), Rorden
patent: 4800885 (1989-01-01), Johnson
patent: 4804938 (1989-02-01), Rouse et al.
patent: 4805208 (1989-02-01), Schwartz
patent: 4807222 (1989-02-01), Amitay
patent: 4813057 (1989-03-01), Fullerton
patent: 4815106 (1989-03-01), Propp et al.
patent: 4833702 (1989-05-01), Shitara et al.
patent: 4837786 (1989-06-01), Gurantz et al.
patent: 4837802 (1989-06-01), Higashiyama et al.
patent: 4860307 (1989-08-01), Nakayama
patent: 4866732 (1989-09-01), Carey et al.
patent: 4878238 (1989-10-01), Rash et al.
patent: 4893327 (1990-01-01), Stern et al.
patent: 4894842 (1990-01-01), Broekhaven et al.
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 4905221 (1990-02-01), Ichiyoshi
patent: 4918689 (1990-04-01), Hui
patent: 4943973 (1990-07-01), Werner
patent: 4965759 (1990-10-01), Uchida et al.
patent: 4979186 (1990-12-01), Fullerton
patent: 4984247 (1991-01-01), Kaufmann et al.
patent: 4995083 (1991-02-01), Baker et al.
patent: 5005183 (1991-04-01), Carey et al.
patent: 5008953 (1991-04-01), Dahlin et al.
patent: 5016255 (1991-05-01), Dixon et al.
patent: 5018165 (1991-05-01), Sohner et al.
patent: 5022047 (1991-06-01), Dixon et al.
patent: 5023887 (1991-06-01), Takeuchi et al.
patent: 5025452 (1991-06-01), Sohner et al.
patent: 5042050 (1991-08-01), Owen
patent: 5056109 (1991-10-01), Gilhousen et al.
patent: 5073900 (1991-12-01), Mallinckrodt
patent: 5081642 (1992-06-01), O'Clock, Jr. et al.
patent: 5101501 (1992-03-01), Gilhousen et al.
patent: 5109390 (1992-04-01), Gilhousen et al.
patent: 5146471 (1992-09-01), Cowart
NEC Research & Development (1990) Apr., No. 97, Tokyo, JP, A High Performance Power Line Spread-Spectrum Modem, Soichi Tsumura , pp. 57-65.
IEEE Transactions on Broadcasting 36 (1990) Sep., No. 3, New York, US, A Spread-Spectrum Based Synchronization Technique For Digital Broadcast Systems, pp. 185-194.
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, p. 34.5-1.
Mohsen Kavehrad et al., Direct Sequence Spread Spectrum with DPSK Modulation and Diversity for Indoor Wireless Communications, IEEE Transactions on Communications, Feb. 1987, vol. COM-35, No. 2, pp. 224-226.
Payne Freret et al., Applications of Spread-Spectrum Radio to Wireless Terminal Communications, Proceedings of the IEEE, 1980, pp. 69.7.1-69.7.4.
Payne Freret, Wireless Terminal Communications Using Spread-Spectrum Radio, Proceedings of the IEEE, 1980, pp. 244-248.
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.
A. Baier and P. W. Baier, Digital Matched Filtering of Arbitrary Spread-Spectrum Waveforms Using Correlators with Binary Quantization, 2 Proceedings, 1983, IEEE Military Communications Conference, Oct. 1983, pp. 418-423.
A. Baier, A Low-Cost Digital Matched Filter for Arbitrary Constant-Envelope Spread Spectrum Waveforms, IEEE Transactions on Communications, Apr. 1984, vol. Com.-32, No. 4, pp. 354-361.
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.
M. K. Sust and M. Kowatsch, All Digital Signal Processing In A Spread Spectrum Communication System, Proceedings of MELECON '87, Mar. 24-26, 1987 pp. 157-161.
Christopher R. Vale, SAW Quadraphase Code Generator, IEEE Transactions On Microwave Theory and Techniquest, vol. MTT-29, No. 5, May 1981, pp. 410-414.
John W. Taylor, Jr., Herman J. Blinchikoff, Quadriphase Code-A Radar Pulse Compression Signal With Unique Characteristics, IEEE Transactions on Aerospace and Electronic Systems, vol. 24, No. 2, Mar. 1988, pp. 156-170.
Rodger E. Ziemer, Carl R. Ryan and James H. Stilwell, Conversion and Matched Filter Approximations for Serial Minimum-Shift Keyed Modulation, IEEE Transactions on Communications, vol. Com. 30, No. 3, Mar. 1982, pp. 495-509.
Manfred G. Unkauf, Surface Wave Devices in Spread Spectrum Systems, Surface Wave Filters (Wiley 1977), pp. 477-509.
Kavehrad, M. and McLane, P. J., Spread Spectrum for Indoor Digital Radio, IEEE Communications Magazine, Jun. 1987, vol. 25, No. 5, pp. 32-40.
Robert C. Dixon, Spread Spec
Dixon Robert C.
Vanderpool Jeffrey S.
Cain David C.
Omnipoint Data Company, Incorporated
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