Detection and characterization of LPI signals

Details Detection and characterization of LPI signals Detection and characterization of LPI signals

1993-02-24

1993-09-21

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

For pulse modulation

329304, 342194, G01S 7292

Patent

active

052473082

ABSTRACT:
BPSK signals are detected by receiving an input signal containing the BPSK ignals to be detected, by means of a compressive receiver; applying the receiver output to a 90.degree. 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.degree. 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.

REFERENCES:
patent: 4443801 (1984-04-01), Klose et al.
patent: 4647863 (1987-03-01), Skudera, Jr. et al.
patent: 4860318 (1989-08-01), Shaw et al.
patent: 4965581 (1990-10-01), Skudera, Jr. et al.
patent: 5001723 (1991-03-01), Kerr
patent: 5185765 (1993-02-01), Walker

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