Combined ECCM/diversity tropospheric transmission system

摘要

A tropospheric transmission system employing perfect noise codes in providing 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.