Performance Analysis of Precoding Techniques in Cellular Network

In this paper, the performance of LTE codebook based precoding technique is analyzed in downlink cellular network. The performance in terms of sumrate is compared with ZF, MMSE, SVD based and GMD based precoding techniques. Rich scattered Rayleigh fading channel is considered. For scheduling users, random user selection and semi-orthogonal user selection (SUS) techniques are employed and antenna selection is done with two antenna selection techniques: (i) considering maximum channel gain and (ii) maximum sumrate of antenna combination among all possible antenna combinations of BS antennas. We consider the LTE codebook for 2 transmit antennas and 4 transmit antennas case. Accordingly, 2×2 and 4×4 MIMO configuration is considered for performance analysis.