Method and apparatus for civilian receiver operation with P(Y) c

Details Method and apparatus for civilian receiver operation with P(Y) c Method and apparatus for civilian receiver operation with P(Y) c

1996-05-03

1997-11-18

Tarcza, Thomas H.

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

Directive

Including a satellite

342352, G01S 502

Patent

active

056892713

ABSTRACT:
The system and method of allowing the civilian GPS receivers to utilize the satellite transmitted P(Y) code signal without requiring the detailed P(Y) code to be revealed inside the receiver are disclosed. This is done by using the W code generator inside the civilian receiver, by integrating the W code signal across the W period, and by delaying the integrated signal to protect against the possible spoofing attack. The generator of the integrated and delayed W code signal is placed inside the tamper-proof container.

REFERENCES:
patent: 4928106 (1990-05-01), Ashjaee et al.
patent: 4972431 (1990-11-01), Keegan
patent: 5293170 (1994-03-01), Lorenz et al.
patent: 5541606 (1996-07-01), Lennen

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