Accession Number : ADD009966

Title :   Multiplexed Noise Code Generator Utilizing Transposed Codes.

Descriptive Note : Patent Application,


Personal Author(s) : Gutleberp,Frank S

Report Date : 13 Dec 1982

Pagination or Media Count : 17

Abstract : The present invention is directed to the generation of a type of multi-bit digital codes referred to as noise codes, meaning that the information is coded with a code that is 'noise like' in that it will compress to an impulse when detected with a matched filter. In particular, one class of noise codes are known wherein pairs of coded signals termed 'code mates' have autocorrelation functions which provide a peak output at a given time and a zero output or outputs having the same magnitude but opposite polarity, at all other times. When code mate signals, for example, are multiplexed, matched filter detected and linearly added, there is provided a lobeless impulse output of a relatively high amplitude at one given time ( tau = 0) and a zero output at all other times (tau not equal to 0).

Descriptors :   *Patent applications, *Coding, *Digital systems, *Pair production, *Pseudo noise systems, Multiplexing, Matched filters, Output, Autocorrelation, Peak values, Nulls(Amplitude), Generators, Inventions, Noise

Subject Categories : Cybernetics
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE