Patent
Multi-channel digital receiver for global positioning system
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TLDR
In this paper, a receiver for pseudorandom noise (PRN) encoded signals consisting of a sampling circuit and multiple channel circuits, with each channel circuit including a carrier and code synchronizing circuit, and multiple digital correlators with dynamically adjustable code delay spacing.Abstract:
A receiver for pseudorandom noise (PRN) encoded signals consisting of a sampling circuit and multiple channel circuits, with each channel circuit including a carrier and code synchronizing circuit and multiple digital correlators with dynamically adjustable code delay spacing. The sampling circuit provides high-rate digital samples of the incoming composite signal to each receiver channel. Within each channel, the synchronizing circuit detects cycle slips in a locally generated carrier reference signal as well as phase drift in a locally generated PRN code signal. The correlators compare the digital samples with a locally generated PRN code to produce early, late, and/or punctual correlation signals which are used to adjust the local PRN code. A non-linear sampling technique may be used to provide increased sensitivity in the presence of continuous wave interfering signals.read more
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References
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Patent
Digital global positioning system receiver
Robert V. Janc,Steven C. Jasper +1 more
TL;DR: In this article, a digital receiver for GPS C/A-code signals is described, which provides reception and tracking a plurality of satellites simultaneously, using four separate receiver channels, and includes an analog front-end for selecting and frequency translating the received GPS signal.
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Precorrelation digital spread spectrum receiver
TL;DR: A precorrelation digital spread spectrum receiver includes a signal converter for amplifying and directly converting RF band spread spectrum signals received by an antenna to a digitized baseband signal comprising a sequence of N-bit quantized base band values as discussed by the authors.
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Global positioning system course acquisition code receiver
TL;DR: In this article, a GPS satellite receiver is disclosed in which the frequency of the received satellite signal is down converted in a single step by a balanced mixer driven by a half-frequency local oscillator.
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Correlation system for global position receiver
TL;DR: In this paper, a digital receiver for receiving and interpreting navigational data in the global position system comprising faster-than-real-time correlators for correlating the code portions of individual signals with matching codes stored in memory is presented.
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Digital signal processor and processing method for GPS receivers
TL;DR: In this paper, a digital signal processor and processing method for use in receivers of the NAVSTAR/GLOBAL POSITIONING SYSTEM (GPS) employs a digital carrier down-converter, digital code correlator and digital tracking processor.
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