Frequency diversity receiving system based on cancellation of C/

Details Frequency diversity receiving system based on cancellation of C/ Frequency diversity receiving system based on cancellation of C/

1991-01-02

1992-03-03

Tarcza, Thomas H.

Pulse or digital communications

Repeaters

Testing

342357, H04K 100

Patent

active

050938398

ABSTRACT:
A frequency diversity receiving system is based on cancellation of a C/A (Clear/Acquisition) code in a GPS (Global Positioning System). Spread spectrum signals of a P code (Precision) code is picked up by removing, in an interference removal circuit, spread spectrum signals of the C/A code out of spread spectrum signals of L.sub.1 band which are transmitted from GPS satellites. A difference in relative delay times between the spread spectrum signals of the P code in L.sub.1 band and spread spectrum signals of the P code in L.sub.2 band, which are also transmitted from GPS satellites, is obtained in a modified DLL (Delay Locked Loop).

REFERENCES:
patent: 4972431 (1990-11-01), Keegan
patent: 5016257 (1991-05-01), Wolf et al.
patent: 5036330 (1991-07-01), Imae et al.

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