Optimal L2 tracking in a SPS receiver under encryption without k

Details Optimal L2 tracking in a SPS receiver under encryption without k Optimal L2 tracking in a SPS receiver under encryption without k

1995-11-22

1997-03-11

Cain, David C.

Cryptography

Key management

Having particular key generator

375208, 342357, H04L 900

Patent

active

056109849

ABSTRACT:
The optimal design of the SPS Receiver is disclosed. The optimal SPS Receiver includes the digital filter with adjustable characteristics in each digital processing channel. The optimal design of the SPS Receiver is achieved by adjusting the filter characteristics of each digital filter to match the observed spectrum of the unknown W code satellite signals. The matching operation can be performed for each satellite channel with its own secret W code signal.

REFERENCES:
patent: 4463357 (1984-07-01), MacDoran
patent: 4667203 (1987-05-01), Counselman
patent: 4972431 (1990-11-01), Keegan
patent: 5245628 (1993-09-01), LaPadula et al.
patent: 5293170 (1994-03-01), Lorenz et al.

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