Combined ECCM/diversity tropospheric transmission system

Details Combined ECCM/diversity tropospheric transmission system Combined ECCM/diversity tropospheric transmission system

1979-08-06

1981-05-26

Yusko, Donald J.

Pulse or digital communications

Repeaters

Testing

328155, H03H 728, H04B 1500, H04K 100

Patent

active

042702070

ABSTRACT:
A tropospheric transmission system employing perfect noise codes in provig M fold diversity with a single antenna, while simultaneously reducing jamming interference by a factor 2M. The noise codes employed are of the type termed code mates having correlation functions which upon detection provide an impulse autocorrelation function. The described arrangement utilizes n bit perfect noise mate pair codes, with coherent separation and extraction of the uncorrelated returns from the tropospheric medium followed by optimal combination in a maximal ratio combiner.

REFERENCES:
patent: 3461451 (1969-08-01), Gutleber
patent: 3519746 (1970-07-01), Gutleber
patent: 3634765 (1972-01-01), Gutleber
patent: 3715665 (1973-02-01), Chang
patent: 3775685 (1973-11-01), Eggimann et al.
patent: 3881154 (1975-04-01), Lewis et al.
patent: 3909720 (1975-09-01), Fantera
patent: 4121295 (1978-10-01), Witt

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