Reverberation compensating communication system

Details Reverberation compensating communication system Reverberation compensating communication system

1976-09-07

1978-08-22

Safourek, Benedict V.

Telegraphy

Systems

Alternating or pulsating current

325 42, 325 56, 325 65, H04L 2724

Patent

active

041091000

ABSTRACT:
A system for transmitting a signal through a reverberant environment characterized by multipath communication which causes dispersion and fading of the signal. The signal is phase modulated onto a carrier which is also modulated by a repeating series of digital pseudo noise code words. The length of each word is equal to the length of a symbol of the signal and synchronized thereto, individual symbols being of shorter duration than the signal fading time. A receiver views symbols via a selector switch which serves as a window for successively viewing portions of substantially identical reverberation patterns of each symbol. A set of matched filters coupled to the selector switch sequentially demodulates the code words to provide a repeating sequence of pulses of amplitude modulated carrier these amplitude modulated pulses having symbol data thereon and being applied to a delay locked loop for the generation of a reference signal for recovering the symbols.

REFERENCES:
patent: 2982853 (1961-05-01), Price et al.
patent: 3168699 (1965-02-01), Sunstein
patent: 3423729 (1969-01-01), Heller
patent: 3537008 (1970-10-01), Lakatos
patent: 3742440 (1973-06-01), Ehrlich
patent: 3757221 (1973-09-01), Moehrmann
patent: 3780279 (1973-12-01), Stover
patent: 4017798 (1977-09-01), Gordy

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