Transmitting and receiving apparatus for full code correlation o

Details Transmitting and receiving apparatus for full code correlation o Transmitting and receiving apparatus for full code correlation o

1995-12-28

1998-10-20

Tarcza, Thomas H.

Cryptography

Communication system using cryptography

Wireless communication

342357, 342352, G01S 502, H04L 900

Patent

active

058258876

ABSTRACT:
The transmitting and receiving apparatus and method for full code correlation operation under encryption for the Satellite Positioning System (SATPS) are disclosed. The apparatus includes a central station designed to receive SATPS satellites encoded information using a high gain antenna and a delayed correlation receiver. The central station extracts the encrypted satellite information and transmits it to the delayed correlation receiver. The delayed correlation receiver receives the encrypted satellite information using the standard SATPS antenna and performs the full correlation with the encrypted information received from the central station without requiring the secret encryption keys.

REFERENCES:
patent: 4457006 (1984-06-01), Maine
patent: 4809005 (1989-02-01), Counselman, III
patent: 5293170 (1994-03-01), Lorenz et al.
patent: 5495499 (1996-02-01), Fenton et al.
patent: 5541606 (1996-07-01), Lennen
patent: 5576715 (1996-11-01), Litton et al.

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