Null Steering of Adaptive Beamforming Using Linear Constraint Minimum Variance Assisted by Particle Swarm Optimization, Dynamic Mutated Artificial Immune System, and Gravitational Search Algorithm

Table 2

Comparison of weight vectors, power values, and SINR calculation for conventional LCMV, PSO-LCMV, DM-AIS-LCMV, and GSA-LCMV for user at 0° with interference at 20° by using 4 elements.

Algorithm	Weights	Power at 0° (W)	Power at 20° (W)	SINR (dB)
LCMV	−0.0034 − 0.9316i; −2.1723 − 1.8276i; −2.1723 + 1.827i; −0.0034 + 0.9316i	4.35	4.07×10^−5	50.27
PSO	−1.0592 − 0.3784i; −1.1478 − 0.3784i; −1.8144 + 1.27657i; 0.0176 + 1.2784i	4.38	1×10^−15	76.42
DM-AIS	1.2962 + 0.9929i; 0.3293 + 0.9559i; 1.2026 + 0.3361i; 1.9141 + 0.1246i	5.31	6.29×10^−10	77.23
GSA	0.6579 + 0.8473i; 1.3924 + 1.1853i; 0.6916 + 0.5625i; 2.5054 − 0.4960i	5.65	5.03×10^−10	77.50