Auto-correlative derivation of Doppler and Doppler-rate observables from satellite-observed interference radio signals
Abstract
An auto-correlative method is proposed for deriving Doppler frequency shift and its rate (Doppler-rate) of the interference radio signals observed by satellites, with the aim of locating the source position of the interference signals on the earth's surface. The value of a phase-rotated auto-correlation function, which is based on predicted frequency and its rate, is maximized for a certain time lag by varying the predictions, to obtain optimum estimates. The method is effective even in the case of a fairly poor SNR as long as the bandwidth is narrow.
- Publication:
-
Radio Research Laboratory, Journal
- Pub Date:
- July 1985
- Bibcode:
- 1985RaRLJ..32...89S
- Keywords:
-
- Autocorrelation;
- Doppler Effect;
- Radio Frequency Interference;
- Radio Signals;
- Satellite Observation;
- Signal Processing;
- Estimating;
- Narrowband;
- Sarsat;
- Signal To Noise Ratios;
- Communications and Radar