Global position system receiver

Details Global position system receiver Global position system receiver

1985-12-23

1989-02-21

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 1, 342357, H04L 2706

Patent

active

048072567

ABSTRACT:
A Global Position System (GPS) receiver is disclosed which includes an RF converter and quadrature digitizer implemented in hardware and a signal processor including a computer, code generator and preprocessor. The preprocessor has a divide by 1,2,3 divider for controlling the code generator so as to provide I,Q early, prompt and late digital signals of 0.5 chip separations to the computer for tracking code phase, carrier phase/frequency and signal amplitude. This structure eliminates the need for numerically controlled oscillators implemented in hardware while maintaining accurate performance.

REFERENCES:
patent: 3947634 (1976-03-01), Betts
patent: 4221005 (1980-09-01), La Flame
patent: 4361891 (1982-11-01), Lobenstein et al.
patent: 4468793 (1984-08-01), Johnson et al.
patent: 4485383 (1984-11-01), Maher
patent: 4532635 (1985-07-01), Mangulis
patent: 4561089 (1985-12-01), Rouse et al.
patent: 4587661 (1986-05-01), Schiff

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