Impulse autocorrelation function communications system

DETAILED DESCRIPTION I claim: 1.
A bi-orthogonal pulse code modulation communication system, comprising: means for generating first and second multi-bit digital noise codes; means for generating first and second RF carrier signals; means for modulating said first and second noise codes on said first and second RF carrier signals; first transmitting antenna means having a first type polarization coupled to said first carrier signal for radiating a first polarized RF carrier wave modulated with said first noise code; second transmitting antenna means having a second type polarization coupled to said second carrier signal for radiating a second polarized RF carrier wave modulated with said second noise code; first receiving antenna means having said first type polarization and being receptive of said first polarized RF carrier wave; second receiving antenna means having said second type polarization and being receptive of said second polarized RF carrier wave; receiver means coupled to said first and second receiving antenna means for processing respective first and second received signals containing said noise codes from said first and second polarized RF carrier waves received by said antenna means; means coupled to said receiver means for autocorrelation detecting said first and second received signals for detecting said first and second noise codes and providing thereby first and second compressed output signals; and means for combining said first and second compressed output signals to provide a substantially lobeless impulse output signal.
2.
The system of claim 1 wherein said first type of polarization comprises horizontal polarization and said second type of polarization comprises vertical polarization.
3.
The system of claim 2 wherein said first and second noise codes comprise a pair of code mates which upon detection with a matched filter produces an impuse autocorrelation function.
4.
The system of claim 3 wherein said means for autocorrelation detecting comprises first matched filter means for detecting the first of said pair of code mates and second matched filter means for detecting the second of said pair of code mates