| 摘要 |
BPSK signals are detected by receiving an input signal containing the BPSK signals to be detected, by means of a compressive receiver; applying the receiver output to a 90 DEG phase shifter which outputs a phase-shifted signal; applying the phase-shifted signal to a delay line which applies a further phase shift of -180 DEG to the phase shifted signal; and detecting the relative phase of the non-phase-shifted signal from the compressive receiver and the phase-shifted signal from the delay line by applying those signals to respective input ports of a phase detector, the output of the phase detector being indicative of detection of a BPSK signal. Advantageously, zero-crossings of the output signal of the phase detector are detected, and the output of the zero-crossing detector is low-pass-filtered.
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