Carrier aided code tracking loop

Details Carrier aided code tracking loop Carrier aided code tracking loop

1989-11-20

1991-03-26

Buczinski, Stephen C.

Pulse or digital communications

Repeaters

Testing

375115, 370107, 380 34, H04L 2730

Patent

active

050035525

ABSTRACT:
A fast acquisition coherent code tracking loop for use in direct sequence spread spectrum systems is provided with an embedded frequency offset loop. The frequency offset loop in the code tracking loop is provided with a pair of multipliers, one of which is coupled to the carrier tracking loop through a scaling circuit and the second multiplier is coupled to the output of the highly stable VCO of the carrier tracking loop to provide extremely fast phase acquisition of the received PN code and very high frequency stability of the code tracking loop.

REFERENCES:
patent: 4017798 (1977-04-01), Gordy et al.
patent: 4041391 (1977-08-01), Deerkoski
patent: 4122393 (1978-10-01), Gordy et al.
patent: 4279018 (1981-07-01), Carson
patent: 4435822 (1984-03-01), Spencer et al.

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