Expanded multilevel noise code generator employing butting

Details Expanded multilevel noise code generator employing butting Expanded multilevel noise code generator employing butting

1983-09-26

1986-02-04

Shaw, Clifford C.

Communications: electrical

Audible indication

Percussion-type sound producer

375 17, 375 25, 375 96, H03K 1324

Patent

active

045689148

ABSTRACT:
Expanded multilevel noise codes are generated of a type termed "code mates" aving autocorrelation functions which, upon detection in a matched filter, provide an impulse autocorrelation function. More particularly, expanded multilevel code mate pairs are generated by butting two multi-bit codes comprising a mate pair wherein one of the codes in each expanded mate pair comprises a code having a larger amplitude than the other code and whose position is mutually transposed in the expanded mate pairs and further wherein one of the butted codes is the complement or negative of one of the original or base code mates.

REFERENCES:
patent: 3461451 (1969-08-01), Gutleber
patent: 3634765 (1972-01-01), Gutleber
patent: 4293953 (1981-10-01), Gutleber

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