Abstract
Modeling and simulation of uniform linear array usi ng Matrix Inversion-Normalized Least Mean Square (MI-NLMS) adaptive beam forming with minimum Bit Er ror Rate (BER) is developed for smart antenna applications. We have modeled a linear array of ant ennas for 20°Half Power Beam Width (HPBW) and obtained the beam formation with digital modulation of 16 point Quadrature Amplitude Modulation (QAM).This modulation technique is used for the sys tems like CDMA,Wi-Fi (IEEE802.11) and WiMAX (IEEE 802.16).The algorithm have the advantage of both block adaptation and sample by sample techniques which shows that the performance of blo ck adaptation and normalization of Least Mean Square (LMS) improves the system capacity and minim ize bit error rate (BER) upto 10 -4 for the signal to noise ratio of 13 dB’s. The Quadrature amplitude mo dulation (QAM) allows us to send more bits per symbol to achieve higher throughput and to overcome fading and other interferences. The simulation is done in MATLAB.
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