Pulse or digital communications – Repeaters – Testing
Patent
1993-11-29
1995-05-09
Cain, David C.
Pulse or digital communications
Repeaters
Testing
380 34, 380 46, 342357, H04B 1500
Patent
active
054147298
ABSTRACT:
A receiver for pseudorandom noise (PRN) encoded signals consisting of a sampling circuit, multiple carrier and code synchronizing circuits, and multiple digital correlators. The sampling circuit provides digital samples of a received composite signal to each of the several receiver channel circuits. The synchronizing circuits are preferably non-coherent, in the sense that they track any phase shifts in the received signal and adjust the frequency and phase of a locally generated carrier reference signal accordingly, even in the presence of Doppler or ionospheric distortion. The multiple correlators in each channel correlates the digital samples with locally generated PRN codes having multiple offsets, to produce a plurality of correlation signals. The plurality of correlation signals are fed to a parameter estimator, from which the delay and phase parameters of the direct path signal, as well as any multipath signals, may be estimated, and from which a range measurement may be corrected.
REFERENCES:
patent: 4426712 (1984-01-01), Gorski-Popiel
patent: 4457006 (1984-06-01), Maine
patent: 4530103 (1985-07-01), Mosley, Jr. et al.
patent: 4611333 (1986-09-01), McCallister et al.
patent: 4706286 (1987-11-01), Sturza
patent: 4754465 (1988-06-01), Trimble
patent: 4785463 (1988-11-01), Janc et al.
patent: 4791378 (1988-12-01), Waltham
patent: 4800577 (1989-01-01), Tachita et al.
patent: 4807256 (1989-02-01), Holmes et al.
patent: 4821294 (1989-04-01), Thomas, Jr.
patent: 4894842 (1990-01-01), Broekhoven et al.
patent: 5101416 (1992-03-01), Fenton et al.
Langley, R. B., "Why is the GPS Signal So Complex?", GPS World, May/Jun. 1990, pp. 56-59.
Article entitled Proceedings of the Satellite Division International Technical Meeting, Sep. 19-23, 1988.
Cain David C.
NovAtel Communications Ltd.
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