PERFORMANCE ANALYSIS OF EFFICIENT SPARSE CHANNEL ESTIMATION FOR MIMO-OFDM SYSTEM”

Abstract

In this paper we define estimation of sparse frequency selective channels within MIMO-OFDM systems. Recovery of the the transmitted data requires estimate of the Channel State Information (CSI). At the receiver side, CSI is obtained by employing different estimation techniques. Few of the standard technique adopted for channel estimation are Least Square (LS) ,Minimum Mean Square Estimation (MMSE) These channels are independently sparse and share a common support. The method estimates the impulse response for each channel observed by the antennas at the receiver. Estimation is performed in a coordinated manner by sharing minimal information among neighboring antennas to achieve results better than many contemporary methods. Simulations demonstrate the superior performance of the proposed method.