Method and apparatus for digital correlation in pseudorandom noi

Details Method and apparatus for digital correlation in pseudorandom noi Method and apparatus for digital correlation in pseudorandom noi

1996-01-30

1997-07-08

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

For correlation

342145, 342194, 342203, G01S 728

Patent

active

056466269

ABSTRACT:
A pseudorandom noise coded system (100) compensates for imperfections, improving out of range rejection, and includes a digital correlator (200) having a first complex multiplier (202) receiving a sequence of sampled data words and a sequence of precomputed complex data words and producing a sequence of first complex product words. A second complex multiplier (204) receives the sequence of first complex product words and a precomputed constant word and produces a sequence of second complex product words. A complex multiplexer (206) receives a sequence of binary code states, and the sequences of first and second complex product words and produces a sequence of complex multiplexer output words formed as a replica of either the first or the second complex product words, depending on the binary code. A complex accumulator (208) receives the sequence of complex multiplexer output words and produces a complex accumulated sum word formed as a complex sum of the complex multiplexer output words.

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