Performance Evaluation of MIMO OFDM System by using Adaptive MMSE Equalizer

Abstract

In wireless communication system, MIMO-OFDM has been proposed as an efficient technique for providing high date rates, low power consuming and very efficient in 3G and 4G technologies. Multiple- Input Multiple-Output (MIMO) & Orthogonal Frequency-Division Multiplexing (OFDM) systems have a assuring ability to increase the capacity and performance with acceptable Bit Error Rate (BER) proportionally with the increased number of antennas and due to this, the system has grabbed the attention of wireless academic community in industry. AMMSE MIMO-OFDM is one of the prominent equalizer techniques which nullify the noise by using the adaptive minimum mean square error detection. The speed of the adaptive detectors can be improved by using a partially filtered LMS (Adaptive) algorithm. The performance parameters of AMMSE MIMO-OFDM in terms of BER & Channel capacity is determined and it is analyzed for three different detector schemes such as ZF, MMSE and Adaptive MMSE MIMO OFDM System.