Pulse or digital communications – Repeaters – Testing
Patent
1995-11-29
1999-02-16
Vo, Don N.
Pulse or digital communications
Repeaters
Testing
H04B 169
Patent
active
058728082
ABSTRACT:
A spread-spectrum-matched-filter apparatus including a code generator, an in-phase-symbol-matched filter, a quadrature-phase-symbol-matched filter, an in-phase-frame-matched filter, a quadrature-phase-frame-matched filter, and a controller. The code generator generates replicas of a chip-sequence signal, which are used to set the symbol-impulse responses of the inphase-symbol-matched filter and the quadrature-phase-symbol matched filter. The in-phase-frame-matched filter and the quadrature-phase-frame-matched filter detect a despread-header-symbol-sequence signal and generate a maximum output signal which may be used as a data-start signal or for synchronizing the timing of the controller as to when to trigger sampling of the A/D converter, the output of the symbol-matched filters, detection of the data-symbol-sequence signal and other time-dependent processes.
REFERENCES:
patent: 3731198 (1973-05-01), Blasbalg
patent: 4164628 (1979-08-01), Ward et al.
patent: 4392232 (1983-07-01), Andren et al.
patent: 4418393 (1983-11-01), Zscheile, Jr.
patent: 4426630 (1984-01-01), Folkmann
patent: 4538280 (1985-08-01), Mosley, Jr. et al.
patent: 4583048 (1986-04-01), Gumacos et al.
patent: 4621365 (1986-11-01), Chiu
patent: 4630283 (1986-12-01), Schiff
patent: 4653069 (1987-03-01), Roeder
patent: 4755983 (1988-07-01), Masak et al.
patent: 4841545 (1989-06-01), Endo et al.
patent: 4860307 (1989-08-01), Nakayama
patent: 4969159 (1990-11-01), Belcher et al.
patent: 5031192 (1991-07-01), Clark
patent: 5311544 (1994-05-01), Park et al.
patent: 5583884 (1996-12-01), Maruyana et al.
patent: 5627855 (1997-05-01), Davidovici
Cafarella, John H., et al., "Acoustoelectric Convolvers for Programmable Matched Filtering in Spread-Spectrum Systems," Proceedings of the IEEE, vol. 64, No. 5, May 1976, pp. 756-759.
Davidovici Sorin
Kanterakis Emmanuel
Golden Bridge Technology Inc.
Vo Don N.
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