Broadband adaptive doppler estimator and canceller

Details Broadband adaptive doppler estimator and canceller Broadband adaptive doppler estimator and canceller

1990-09-26

1992-07-14

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Receiver circuitry

367904, G01S 1500

Patent

active

051309521

ABSTRACT:
A broadband adaptive Doppler estimator and canceller is described for adaptively removing a moving source of near field primary interference that is masking a weaker target. The estimator and canceller employs a distributed field of sensors, through which is moving the source of interference. The estimator and canceller takes the form of a canceller system, wherein the measured reference waveform is a Doppler shifted version of the interference. The estimator and canceller employ interpolating and decimating of the reference waveform to remove Doppler effects over a broadband. The interpolation is performed by oversampling (zero padding) and low pass filtering, and the decimation is a sample rate reduction. The adaption is performed in the decimation to minimize mean square error in the canceller output.

REFERENCES:
"An Efficient Procedure for Broadband Doppler Compensation", Proceedings of the 1984 IEEE International Conference on Acoustics, Speech and Signal Processing, pp. 47.9.1-47.9.4, Ronald A. Mucci.

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