An Analytical Design: Performance Comparison of MMSE and ZF Detector

Abstract

By using multiple antennas at transmitter and receiver sides, the performance of the system can be enhanced in terms of high data rates by applying the concept of multiplexing and diversity as compared to single antenna systems. In this article we will study and compare the performance of BLAST architecture with different detectors like Zero Forcing (ZF), Minimum Mean Square Error (MMSE). Furthermore, we introduced OSIC schemes to improve the independent coded BLAST system and to combat the error propagation. We have also analyzed the BER performance of these MIMO schemes in Rayleigh and Rician fading channel. Finally we observed that the performance of BPSK and QPSK modulation techniques is almost same in BLAST architecture, while using the given detection techniques in both the channels and 16-QAM modulation technique gives the worst result.

Keywords: Binary Phase Shift Key (BPSK), Bit Error Rate (BER), Multiple input multiple output (MIMO),Maximum Likelihood (ML), Minimum mean square error (MMSE), Zero Forcing (ZF), Ordered Successive Interference Cancellation (OSIC), Quardrature Phase Shift Keying (QPSK), Quadrature Amplitude Modulation (QAM), Independent identically distributed (i.i.d), Bell Laboratories Layered Space-Time (BLAST)