GPS receiver

Details GPS receiver GPS receiver

1987-07-06

1989-01-24

Pellinen, A. D.

Pulse or digital communications

Spread spectrum

Direct sequence

375 94, 392417, 370104, H04L 710

Patent

active

048005770

ABSTRACT:
A GPS receiver comprising a pseudonoise generator for simultaneously generating pseudonoise signals respectively corresponding to satellite electromagnetic waves transmitted from two or more satellites, an oscillator for simultaneously regenerating carrier waves of the plurality of satellite electromagnetic waves, and a plurality of demodulators responsive to the regenerated carrier waves and the pseudonoise signals to demodulate individual satellite electromagnetic waves independently, to thereby regenerate data transmitted from individual satellites, each demodulator being operative, during demodulation, to detect a set of phases of one pseudonoise signal and one regenerated carrier wave relative to one satellite electromagnetic wave on time division basis and including a first mixer for mixing of one pseudonoise signal, a second mixer for mixing of one regenerated carrier wave and a filter, whereby a set of phases of one pseudonoise signal and one regenerated carrier wave is changed to another set at timed relationship with transmission of data from individual satellites to measure a phase of one pseudonoise signal relative to one satellite electromagnetic wave, thereby tracking data transmitted from individual satellites on the basis of the measured phase.

REFERENCES:
patent: 4426712 (1984-01-01), Gorski-Popiel
patent: 4445118 (1984-04-01), Taylor et al.
patent: 4457006 (1984-06-01), Maine
patent: 4575861 (1986-03-01), Leureault
patent: 4578678 (1986-03-01), Hurd
patent: 4644358 (1987-02-01), Sekine
patent: 4651327 (1987-03-01), Fujita
patent: 4701934 (1987-10-01), Jasper
article by G. L. Bjornsen et al; GDM/GPS Receiver Hardware Implementation; Neacon 77 pp. 303-309, 1977.
article by Charles R. Johnson et al; Application of a multiplexed GPS user set; Global Positioning System; vol. II, 1984, pp. 61-77.

Affiliated with

Also associated with

Rating

GPS receiver does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with GPS receiver, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and GPS receiver will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-423591