Global position system (GPS) multiplexed receiver

Details Global position system (GPS) multiplexed receiver Global position system (GPS) multiplexed receiver

1980-12-01

1984-11-27

Tubbesing, T. H.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

370104, 375114, H04B 7185

Patent

active

044853831

ABSTRACT:
A global position system (GPS) capable of multiple (two or more space vehicles) space vehicle (SV) multiplexing comprises an RF energy receiver for receiving high and low frequencies (L.sub.1 and L.sub.2) from a plurality of SVs on different codes, a switching means for alternately switching the RF receiver between the coded L.sub.1, L.sub.2 signals for detection, a digital processing means, replica coded L.sub.1, L.sub.2 signal producing hardware, and a coherent time and frequency synthesis means, said digital processing means connected to the RF receiver, coherent time and frequency synthesis means, and replica coded L.sub.1, L.sub.2 signal producing hardware for producing for the RF receiver replica coded L.sub.1, L.sub.2 signals for each SV to be tracked and adjusting with respect to the coherent time and frequency synthesis circuit the states of the hardware replica receiver signals to align them with corresponding signals of each of the SVs at a rate that supports sampled data closed-loop tracking of the SVs without reacquisition of each SV being tracked.

REFERENCES:
patent: 3349403 (1967-10-01), Kelly et al.
patent: 3373424 (1968-03-01), Thyssens
patent: 3430237 (1969-02-01), Allen
patent: 3449748 (1969-06-01), Thyssens
patent: 3742498 (1973-06-01), Dunn
patent: 3747095 (1973-07-01), Wilson
patent: 3836721 (1974-09-01), Sugioka

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