Title :
Angle of arrival estimation of coherent signals using a shifted array correlation technique
Author_Institution :
Sanders Associates, Nashua, NH, USA
Abstract :
Shifted array correlation (SAC) correlates M shifted array vectors with testing vectors to solve for M angles-of-arrival. In special cases and at high array signal-to-noise ratios (ASNRs), the resolution patterns generated by SAC are simply related to spatial smoothing patterns. Computer simulation results are presented to show some of the performance characteristics of the SAC technique as applied to the two wavefront problem. Numerical analysis of the two wavefront-signal case predicts the experimental difficulty of resolving two closely spaced coherent signals. Narrow spacings, on the order of 0.1 beamwidths, require ASNRs in excess of 50 dB.<>
Keywords :
antenna arrays; correlation methods; radio direction-finding; signal detection; angle of arrival estimation; array signal-to-noise ratios; beamwidths; coherent signals; computer simulation; direction finding; numerical analysis; performance characteristics; resolution patterns; shifted array correlation; shifted array vectors; spatial smoothing patterns; testing vectors; two wavefront problem; wavefront-signal; Additive noise; Antenna arrays; Equations; Phased arrays; Receiving antennas; Signal analysis; Signal resolution; Smoothing methods; Spatial resolution; Testing;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1988. AP-S. Digest
Conference_Location :
Syracuse, NY, USA
DOI :
10.1109/APS.1988.94045
