GPS pseudolite and receiver system using high anti-jam pseudolit

Details GPS pseudolite and receiver system using high anti-jam pseudolit GPS pseudolite and receiver system using high anti-jam pseudolit

1998-03-25

2000-02-29

Tarcza, Thomas H.

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

Directive

Including a satellite

34235706, 701213, G01S 502, H04B 7185

Patent

active

060314877

ABSTRACT:
Disclosed is a GPS pseudolite transmitter, receiver and navigation system. The GPS pseudolite transmitter is adapted to transmit a first phase modulated L-band signal at a first signal pulse repetition rate having an associated first period time duration. The first phase modulated L-band signal is modulated with a short period code having a code epoch of at least about one millisecond. For each consecutive transmission pulse having the first period time duration, the pseudolite transmitter transmits the first phase modulated L-band signal during less than one half of the first period time duration, and for at least about 1 millisecond so that the first pseudolite transmitter transmits an epoch of the short period code during each transmission pulse. A receiver is adapted to receive the first phase modulated L-band signal from the first pseudolite transmitter, at times when it is not integrating phase modulated L-band signals from other GPS pseudolites transmitters, such that cross-correlation with other phase modulated L-band signals is minimized. Furthermore, the receiver is adapted to receive the L-band satellite signal during intervals when no pseudolite signals are being received.

REFERENCES:
patent: 4928106 (1990-05-01), Ashjaee et al.
patent: 5192957 (1993-03-01), Kennedy
patent: 5311194 (1994-05-01), Brown
patent: 5702070 (1997-12-01), Waid
patent: 5708440 (1998-01-01), Trimble et al.
patent: 5786773 (1998-07-01), Murphy
patent: 5884214 (1999-03-01), Krasner

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