Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1992-05-04
1994-12-06
Chin, Stephen
Pulse or digital communications
Spread spectrum
Direct sequence
375102, 348614, H04B 110
Patent
active
053717627
ABSTRACT:
A signal dispersion cancellation structure receives incoming signal samples at an incoming rate, stores these samples in a first memory and then writes these samples at a submultiple of the incoming rate into a plurality of second memories. Each second memory is associated with a finite impulse response (FIR) filter and the second memory samples are coupled to the associated FIR filter at the incoming rate. Advantageously, apparatus is also provided which enables any sample in a second memory to be provided to the associated FIR filter and outputted therefrom at a time related to the position of any signal dispersion.
REFERENCES:
patent: 4807033 (1989-02-01), Keesen et al.
patent: 4933891 (1990-06-01), Schenk
patent: 4953184 (1990-08-01), Simone
patent: 5051981 (1991-09-01), Kline
S. Matsuura et al., "Development of a Ghost Cancel Technology for TV Broadcasting", 1990 NAB Engineering Conference Proceedings, Result of Field Tests of a Ghost Canceling System for Television Broadcasting, Appendix A, National Association of Broadcasters, Washington, D.C., 1990, pp. 229-238.
Amrany Daniel
Wang Jin-Der
AT&T Corp.
Chin Stephen
Padnes David R.
Phan Hai H.
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