Decimal Genetics Algorithms for Null Steering and Sidelobe Cancellation in Switch Beam Smart Antenna System.

摘要

Sidelobes cancellation is challenging task in beamforming and beam steering insmart antenna systems. The high level of sidelobes can significantly degrade thesystem performance as well as antenna power efficiency. In this paper, wepresent the new decimal genetic algorithm to reduce the sidelobe and at thesame time create the nulls toward interferers and jammers. This technique takesadvantage of Chebyshev coefficients window as an initial weight vector to speedup the optimization process. The simulation results have shown that thistechnique is able to find the most suitable weights vector to reduce the sidelobepower and at the same time create the nulls toward interferers. Verification hasbeen done for Uniform Linear Array (ULA) structure. However, this technique canbe used for non regular geometrical antenna array structure with variety of beampattern requirements