Radio receiver

Details Radio receiver Radio receiver

1991-01-15

1993-08-31

Tarcza, Thomas H.

Pulse or digital communications

Repeaters

Testing

342357, H04K 100

Patent

active

052415619

ABSTRACT:
A radio receiver (16) for direct sequence spread spectrum signals incorporates a quadrature zero-IF architecture, means for comb filtering (36,37) the two quadrature related channels (I and Q) and a means of non-coherent demodulation of each channel; the non-coherent demodulating means comprising delays (40,41) and mixers (42,43). This process obviates the need for locally generated versions of the spreading code used to produce the signals and considerably shortens the time-consuming process of correlating the received and the locally generated codes at receiver switch-on.

REFERENCES:
patent: 4100498 (1978-07-01), Alsup et al.
patent: 4247939 (1981-01-01), Stromswold et al.
patent: 4912721 (1990-03-01), Pidgeon et al.
patent: 4943976 (1990-07-01), Ishigaki

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