The Limited Aperture Sparse Array for DOA Estimation of Coherent Signals: A Mutual-Coupling-Optimized Array and Coherent DOA Estimation Algorithm

Table 1

Comparison of mutual coupling leakage of different arrays.

	Array aperture	d		Mutual coupling leakage
Proposed	8	0.5	0,2,4,7,10,12,14,16	0.0826
CA	8	0.5	0 4 5 8 10 12 15 16	0.1076
ECA	8	0.4444	0 2 4 5 6 8 13 18	0.1140
NA	8	0.4211	0 1 2 3 7 11 15 19	0.1194
SULA	8	1.1429	0 1 2 3 4 5 6 7	0.0806
ULA	3.5	0.5	0 1 2 3 4 5 6 7	0.1819