Digital circuit for correcting phase shift of digital signal

Details Digital circuit for correcting phase shift of digital signal Digital circuit for correcting phase shift of digital signal

1985-12-26

1987-08-25

Blum, Theodore M.

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

Directive

Including a satellite

375 1, H04B 7185, G01S 502

Patent

active

046896260

ABSTRACT:
A GPS receiver comprises a phase-error derivation circuit which derives the average phase error over a predetermined period. The phase-error derivation circuit sends an average phase difference signal to a numerically controlled oscillator to control its clock rate. Deriving the average phase error over the predetermined period makes it possible to determine accurately the phase error between the Gold code sequence from the satellite and the Gold code sequence derived by the local Gold code generator.

REFERENCES:
patent: 4485383 (1984-11-01), Maher
patent: 4617674 (1986-10-01), Mangulis et al.

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