Baseband differentially phase encoded radio signal detector
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United States of America Patent
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-
Feb 24, 1981
Grant Date -
N/A
app pub date -
Dec 11, 1978
filing date -
Dec 11, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A radio signal is applied to an in phase detector channel and a quadrature phase detector channel. Each detector channel includes, in cascade arrangement; an in phase downconverter means for downconverting the received radio signal to a baseband signal; a sampling means for sampling the baseband signal at a predetermined rate; and a matched filter means matched to the symbol waveform and wherein the sample pulses are stored over a predetermined period of time that corresponds to two data symbols. The sum of the pulses for the first data symbol and the sum of the pulses for the second data symbol are compared to determine if there has been a phase reversal between the two data symbols. The outputs of the in phase and quadrature phase channels are summed, which results in demodulation of the encoded data.
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