Pulse or digital communications – Repeaters – Testing
Patent
1994-12-21
1997-02-04
Chin, Stephen
Pulse or digital communications
Repeaters
Testing
375200, 375343, H04B 1500, H04K 100, H04L 2730
Patent
active
056006705
ABSTRACT:
The channels of a GPS receiver system are dynamically allocated during acquisition mode to hierarchically chain a slave channel module to a master channel. Each channel circuit includes two correlators, where each correlator receives a digitized received GPS signal and a delayed local PRN reference code signal to provide an output signal to an accumulator. During acquisition, the system provides two correlator channels where each channel includes two correlators for a total of four correllators. A PRN reference code signal is progressively delayed to provide a sequence of progressively delayed PRN reference code signals, where one of the sequence of progressively delayed PRN reference code signals are applied to each of the correlators. Each correlator channel also includes a digital mixer which receives a digitized GPS IF signal and a digital carrier reference signal and which provides the digitized received GPS signal.
REFERENCES:
patent: 4550414 (1985-10-01), Guinon et al.
patent: 4821294 (1989-04-01), Thomas, Jr.
patent: 4894842 (1990-01-01), Broekhoves et al.
patent: 5101416 (1992-03-01), Fenton et al.
patent: 5414729 (1995-05-01), Feston
patent: 5420593 (1995-05-01), Niles
Chin Stephen
King Patrick T.
Trimble Navigation Ltd.
Webster Bryan E.
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