Wideband frequency discriminator and radiolocalization receiver

Details Wideband frequency discriminator and radiolocalization receiver Wideband frequency discriminator and radiolocalization receiver

2011-06-21

2011-06-21

Mai, Tan V (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

07966359

ABSTRACT:
A Frequency discriminator based on a combination of Discrete Fourier Transform (DFT) operator and half-bin DFT operator, corresponding to a set of Twiddle factors with frequency double than the sampling frequency. The frequency estimators are so chosen as not to have any zero or discontinuity point. Therefore the discriminator of embodiments of invention is more stable and well-behaved in an extended operating range. The discriminator of the invention, when applied to a Global Positioning System (GPS) receiver, allows a safer lock to the carrier frequency, even in presence of a large initial error, and avoids the problem of false locks.

REFERENCES:
patent: 4797677 (1989-01-01), MacDoran et al.
patent: 5291081 (1994-03-01), Takeuchi et al.
patent: 5343210 (1994-08-01), Marcuard
patent: 5663734 (1997-09-01), Krasner
patent: 5721555 (1998-02-01), Lennen
patent: 5781156 (1998-07-01), Krasner
patent: 6044105 (2000-03-01), Gronemeyer
patent: 6289041 (2001-09-01), Krasner
patent: 6392590 (2002-05-01), Kagemoto
patent: 6650285 (2003-11-01), Jandrell
patent: 6750814 (2004-06-01), Nir et al.
patent: 6772065 (2004-08-01), Sanmiya et al.
patent: 6795771 (2004-09-01), Fuchs et al.
patent: 6909739 (2005-06-01), Eerola et al.
patent: 6931055 (2005-08-01), Underbrink et al.
patent: 0 788 225 (1997-08-01), None
patent: 1696557 (2006-08-01), None
patent: WO 02/25829 (2002-03-01), None
J. J. Spilker, Jr., “GPS Signal Structure and Performance Characteristics”, Navigation: Journal of the Institute of Navigation, Summer 1978, vol. 25, No. 2, pp. 29-54.
Mats Brenner, “Integrated GPS/Inertial Fault Detection Availability”, Navigation: Journal of the Institute of Navigation, vol. 43, No. 2, 1996, pp. 339-358.
E. M. Copps et al., “Optimal Processing of GPS Signals”, ION Annual Meeting, Jun. 1980, pp. 13-24.
D. B. Cox, Jr., “Integration of GPS with Inertial Navigation Systems”, Navigation: Journal of the Institute of Navigation, Summer 1978, vol. 25, No. 2, pp. 144-153.
Christopher J. Hegarty, “Analytical Derivation of Maximum Tolerable In-Band Interference Levels for Aviation Applications of GNSS”, Navigation: Journal of the Institute of Navigation, vol. 44, No. 1, 1997, pp. 349-367.
N. B. Hemesath, “Performance Enhancements of GPS User Equipment”, Navigation: Journal of the Institute of Navigation, Summer 1978, vol. 25, No. 2, pp. 103-108.
E. H. Martin, “GPS User Equipment Error Models”, 33rdAnnual Meeting of the Institute of Navigation, Jun. 23, 1977, pp. 109-118.
Peter C. Ould et al., “All-Digital GPS Receiver Mechanization”, ION Aerospace Meeting, Apr. 1981, pp. 25-35.
Bernhard A. Schnaufer et al., “WAAS Receiver Carrier Tracking Loop and Data Demodulation Performance in the Presence of Wideband Interference”, Navigation: Journal of the Institute of Navigation, vol. 44, No. 1, 1997, pp. 369-382.
Kai P. Yiu et al., “A Low-Cost GPS Receiver for Land Navigation”, Hewlett-Packard Laboratories, May 1982, pp. 44-60.

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