SINR Analysis and Performance Evaluation of Space-Time-Frequency spread MIMO-OFDM-CDMA system using MMSE Receiver
DOI:
https://doi.org/10.14741/Keywords:
Code Division Multiple Access (CDMA), Minimum Mean Square Error (MMSE) Receiver, Multiple Access Interference (MAI), Multiple-Input Multiple-Output (MIMO), Orthogonal Frequency Division Multiplexing (OFDM), Space-Time-Frequency (STF) Spreading, Signal to Interference Noise Ratio (SINR), Zero Forcing (ZF) Receiver.Abstract
MIMO-OFDM-CDMA system has been identified as a key technology to support high data rates in current and future wireless systems. MMSE receiver plays an important role in the performance evaluation of MIMO-OFDM-CDMA system. In this paper, we propose a detailed Signal-to-Interference Noise Ratio (SINR) analysis for space-time-frequency spread MIMO-OFDM-CDMA system using MMSE receiver. The accurate expressions for SINR have been derived for MMSE receiver. Further, the performance of such 4x4 MIMO system has also been evaluated and compared with zero forcing (ZF) receiver through simulation. The simulation results of the MIMO-OFDM-CDMA system are in line with the results obtained through mathematical analysis and MMSE receiver performs better than ZF receiver.
