The Research Of Smart Antennas Technique Based On Blind Algorithm

The so-called smart antenna system (Smart Antenna System) is the combination of antenna arrays and advanced signal processing technology to form an antenna array system with adaptive signal processing capabilities. It is hot spots of communications and signal processing research area. Smart antennas can provide high-quality data link for cellular systems, enhancing the coverage and system capacity of BS antenna and reducing the interference between mobile users. A constant modulus array (CMA) based blind beamforming algorithm is presented. Basing on the independent and orthogonal conditions of transmitted signals, the weighting vectors of beamformer are constrained to eliminate correlation caused by multiple effect, so the blind beamformer proposed can be steered to individual source signal and separate the correlated signals. The simulation results demonstrate the proposed algorithm can decompose the correlation signals.