Code synchronizing apparatus

Details Code synchronizing apparatus Code synchronizing apparatus

1978-03-29

1979-09-18

Smith, Jerry

Boots, shoes, and leggings

G06F 1534

Patent

active

041685296

ABSTRACT:
A code synchronizing apparatus for synchronizing a local pseudo-random binary-sequence code generator with signals of a pseudo-random binary-sequence carried on incoming signals from a remote source, includes a sampler for obtaining sequences of samples of an input signal and of local code signals from a signal generator, a correlator for correlating the sequences of samples with those of local code signals which are offset by different integral numbers of bit-periods from a sequence of local code signals produced while the input signals were being sampled, an adder for summing the correlation values for each offset, means for identifying the offset which produces the maximum summation of correlations, and a correlation counter for correcting the timing of the local code generator by an amount dependent on the magnitude of the offset so identified.

REFERENCES:
patent: 3412334 (1968-11-01), Whitaker
patent: 3701894 (1972-10-01), Low et al.
patent: 3883729 (1975-05-01), De Cremiers
patent: 4007330 (1977-02-01), Winters

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