Forward/backward spatial smoothing techniques for coherent signal identification

1989/01/01 by S.U. Pillai, B.H. Kwon, Byung Ho Kwon · 13 citations
Computer Science · Earth and Planetary Sciences · Engineering · #Direction-of-Arrival Estimation Techniques #Underwater Acoustics Research #Radar Systems and Signal Processing

paper · doi:10.1109/29.17496

Abstract

A spatial smoothing scheme is further investigated in the context of coherent signal classification. It is shown that by making use of a set of forward and complex conjugated backward subarrays simultaneously, it is always possible to estimate any K directions of arrival using at most 3K/2 sensor elements. This is achieved by creating a smoothed array output covariance matrix that is structurally identical to a covariance matrix in some noncoherent situation. By incorporating eigenstructure-based techniques on this smoothed covariance matrix, it then becomes possible to correctly identify all directions of arrival irrespective of their correlation.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Citations

• Multiple emitter location and signal parameter estimation
• On spatial smoothing for direction-of-arrival estimation of coherent signals

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