Delay-locked loop code tracking system for receiver of a code sp

Details Delay-locked loop code tracking system for receiver of a code sp Delay-locked loop code tracking system for receiver of a code sp

1996-07-22

1998-04-07

Ghebretinsae, T.

Computer graphics processing and selective visual display system

Display driving control circuitry

Physically integral with display elements

345346, 331DIG2, H04L 2730

Patent

active

057373620

ABSTRACT:
The present invention provides a double delay-locked loop(DDLL) code tracking loop for spreading a linear section of an energy detecting area of the tracking loop by using several code time, and provides a delay-locked loop code tracking system for a receiver of a code spread communication system capable of performing an effective code tracking even when a changing ratio of a receiving path is large, by variably using a difference of a preceding time code and a delayed time code according to a change of a receiving environment being changed without cease. Accordingly, the code tracking loop of the present invention improves the receiver performance of the code spread radio communication system, and simplifies a structure of the receiver.

REFERENCES:
patent: 4221005 (1980-09-01), La Flame
patent: 4285060 (1981-08-01), Cobb et al.
patent: 4550414 (1985-10-01), Guinon et al.
patent: 5060180 (1991-10-01), Kingston et al.
patent: 5105436 (1992-04-01), Mori et al.
patent: 5299229 (1994-03-01), Zscheile, Jr. et al.
patent: 5477195 (1995-12-01), Spilker

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