A new technique for direction of arrival estimation for ionospheric multipath channels
Date
2009
Authors
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Source Title
Advances in Space Research
Print ISSN
0273-1177
Electronic ISSN
Publisher
ELSEVIER
Volume
44
Issue
6
Pages
653 - 662
Language
English
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Abstract
A novel array signal processing technique is proposed to estimate HF channel parameters including number of paths, their respective direction of arrivals (DOA), delays, Doppler shifts and amplitudes. The proposed technique utilizes the Cross Ambiguity Function (CAF), hence, called as the CAF-DF technique. The CAF-DF technique iteratively processes the array output data and provides reliable estimates for DOA, delay, Doppler shift and amplitude corresponding to each impinging HF propagated wave onto an antenna array. Obtained results for both real and simulated data at different signal to noise ratio (SNR) values indicate the superior performance of the proposed technique over the well known MUltiple SIgnal Classification (MUSIC) technique.