Baseband signal processor for a microwave radio receiver
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United States of America Patent
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-
Feb 7, 1995
Grant Date -
N/A
app pub date -
Dec 21, 1992
filing date -
Dec 21, 1992
priority date (Note) -
Expired
status (Latency Note)
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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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