Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1998-11-24
2000-10-03
Ghebretinsae, Temesghen
Pulse or digital communications
Spread spectrum
Direct sequence
375143, 375144, 375347, H04B 1707
Patent
active
061283304
ABSTRACT:
A system and method for transmitting a plurality of spread-spectrum signals over a communications channel having fading. The plurality of spread-spectrum signals are radiated by a plurality of antennas, with each antenna preferably spaced by one-quarter wavelength. A plurality of receiver antennas receive the plurality of spread-spectrum signals and a plurality of fading spread-spectrum signals. Each receiver antenna is coupled to a plurality of matched filters having a respective plurality of impulse responses matched to the chip-sequence signals of the plurality of spread-spectrum signals. A RAKE and space-diversity combiner combines, for each respective chip-sequence signal, a respective plurality of detected spread-spectrum signals and a respective multiplicity of detected-multipath-spread-spectrum signals, to generate a plurality of combined signals. The symbol amplitudes can be measured and erasure decoding employed to improve performance.
REFERENCES:
patent: 4694467 (1987-09-01), Mui
patent: 5657343 (1997-08-01), Schilling
patent: 5859879 (1999-12-01), Bolgiano et al.
patent: 5960039 (1999-09-01), Martin et al.
Ghebretinsae Temesghen
Linex Technology, Inc.
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