Baseband signal processor for a microwave radio receiver

Details Baseband signal processor for a microwave radio receiver Baseband signal processor for a microwave radio receiver

1992-12-21

1995-02-07

Chin, Stephen

Pulse or digital communications

Spread spectrum

Direct sequence

375114, 375 58, 375 96, 36472806, 371 471, H04L 706

Patent

active

053881265

ABSTRACT:
A baseband signal processor within a radio receiver provides a design which does not materially increase the size and weight or decrease the battery life of the host equipment. A passive analog delay line is used for correlation by analog summing. The time discrimination function of spread spectrum is retained, and is used for one dimension of the diversity operation. A further analog integration technique is used to sum the data symbol energy received over a time interval corresponding to the delay differences of multiple radio paths. The input signal for the signal processor is an NRZ binary analog baseband waveform that is shaped for a minimal bandwidth transmission medium, but modified by the distortions which result from radio propagation. The output of the signal processor is the data content presented as clean logic-level states with lines for data and bit clock.

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patent: 5084891 (1992-01-01), Ariyavisitakul et al.
patent: 5132985 (1992-07-01), Hashimato et al.

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