New algorithms for hyperbolic radionavigation

Author

Fisher, A.J.

Author_Institution

Dept. of Comput. Sci., York Univ., UK

Volume

140

Issue

2

fYear

1993

fDate

4/1/1993 12:00:00 AM

Firstpage

145

Lastpage

152

Abstract

Hardware and software aspects of the design of a microprocessor-based radionavigation receiver are discussed. The receiver uses the orange channel of the Decca Navigator transmissions, and is based on a design published by J.D. Last (1984). Unlike Last´s design, it computes a position fix by directly measuring the phase of the signal, using phase-locked-loop techniques, with software correction for interrupt latency. A phase determination algorithm is presented which compensates for local oscillator drift and for skew error due to movement of the vehicle during the measurement cycle, and which appears to be particularly resistant to errors due to skywave propagation effects. A further algorithm, based on number-theoretic techniques, is presented for performing zone identification by phase comparison using the master (6f) and orange (8.2f) transmissions only

Keywords

mobile radio systems; number theory; phase-locked loops; radio receivers; radionavigation; telecommunications computing; Decca Navigator transmissions; hyperbolic radionavigation; interrupt latency; microprocessor; number-theoretic techniques; orange channel; phase comparison; phase determination algorithm; phase measurement; phase-locked-loop; radionavigation receiver; skywave propagation effects; software; zone identification;

fLanguage

English

Journal_Title

Radar and Signal Processing, IEE Proceedings F

Publisher

iet

ISSN

0956-375X

Type

jour

Filename

210678