Accession Number : ADD009821

Title :   CW Interference Cancelling System for Spread Spectrum Signals.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Gutleber,Frank S

Report Date : 01 Sep 1982

Pagination or Media Count : 17

Abstract : It is an object of the present invention to provide an improved noise coded communication system. Another object of the present invention is to provide an improved noise coded communication system which eliminates continuous wave or slowly varying continuous wave interfering signals. Still another object of the present invention is to provide an improved noise coded communication system which totally eliminates continuous wave or slowly varying continuous wave interference while experiencing no loss and substantially no degradation of the desired signal. And yet another object of the present invention is to provide a CW canceller for noise coded communication systems which is relatively small in size, weight and extremely low in cost. Accordingly, these and other objects are achieved by means of a variable delay line and a linear adder coupled to the receiver output of a multiplexed noise coded transceiver. The noise code comprises a multi-bit binary code having a code bit width TAU and which upon matched filter detection compresses to an impulse having a width TAU.

Descriptors :   *Patent applications, *Suppressors, *Cancellation, Continuous waves, Radiofrequency interference, Coding, Degradation, Noise, Spread spectrum, Delay lines, Multiplexing, Receivers, Matched filters, Variables, Signals, Output, Inventions, Interference, Detection

Subject Categories : Cybernetics
      Radiofrequency Wave Propagation
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE