Pulse or digital communications – Repeaters – Testing
Patent
1989-02-28
1991-01-29
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
329304, 375 85, H04L 2722
Patent
active
049892207
ABSTRACT:
A method and an apparatus for demodulating M-ary PSK signals of the type wherein the modulation is limited to phase transitions between adjacent phase states. The method is operative in a demodulator which comprises a phase splitter dividing a source signal into two paths with a preselected phase relationship among phases, one of the phases being delayed by nominally one bit period, a mixer or multiplier receiving as one input a representation of the delayed-phase component and as a second input a representation of the other phase component. A signal is filtered by a lowpass filter and provided to at least one corresponding two-level comparator, each of which produces a digital output. Digital logic circuitry responds to the digital outputs of each of the comparators to map the digital outputs into a single digital bit stream of ones and zeros.
REFERENCES:
patent: 3387220 (1968-06-01), Lender
patent: 3891927 (1975-06-01), Filaferro et al.
patent: 4121050 (1978-10-01), Witt
patent: 4618830 (1986-10-01), Mori et al.
patent: 4715047 (1987-12-01), Hambley
Digital Communications--Satellite/Earth Station Engineering, Kamilo Feher, (Prentice-Hall, 1983, pp. 170-171).
First Pacific Networks
Huseman Marianne
Safourek Benedict V.
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