Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1999-10-20
2000-12-19
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
G01S 352
Patent
active
06163297&
ABSTRACT:
A method and apparatus for determining from a moving observer the location, in terms of latitude, longitude, altitude, and velocity, of a stationary or moving radar emitting a pulsed or continuous-wave signal. The moving observer extracts from the radar signal significant electronic support measures (ESM) parameters, including frequency, pulse repetition interval, and pulse width, and determines from those parameters whether a radio frequency (RF) or pulse repetition frequency (PRF) measurement technique is appropriate, and whether the radar signal angle-of-arrival (AOA) must be computed. The emitter location is computed using a ratio of sequential frequency measurements, and the moving observer continues to collect frequency measurements until the location of the emitter can be established to within a predetermined degree of certainty.
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patent: 5572427 (1996-11-01), Link et al.
Boettcher eet al., "Object Oriented Design of Radar Warning Receiver Application Software", Proceedings IEEE/AIAA 10th, pp. 550-554, Oct. 1991.
Becker, K., "A General Approach to TMA Observability from Angle and Frequency Measurements" IEEE, Trans on AES, vol. 32, No. 1, Jan. 1996.
Chan, Y.T. et al, "Sequential Localization of a Radiating Source By Doppler-Shifted Frequency Measurements", IEEE Trans. on Aerospace and Electronic Systems, vol. 28, No. 4, Oct. 1992, pp. 1084-1090.
Issing Gregory C.
Litton Systems Inc.
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