Ordered iterative successive interference cancellation algorithm for large MIMO detection

Abstract

In this paper, we propose an Iterative Successive Interference Cancellation (ISIC) method for detecting the symbol vector in large MIMO systems. The minimum mean squared error (MMSE) estimate of the received symbol vector are used as an initial solution in ISIC algorithm. We then propose an ordered ISIC (OISIC) algorithm which uses the log likelihood ratio (LLR) based ordering in the detection sequence. The bit error rate (BER) performance of ISIC and OISIC algorithms is simulated for different antenna configurations in MIMO system. Simulation results show that OISIC algorithm outperforms MMSE and successive interference cancellation (SIC) based detection algorithms. Furthermore, the performance of the proposed algorithm improves with increase in antennas and approaches towards single-input single-output (SISO) additive white Gaussian noise (AWGN) performance which proves the effectiveness of OISIC algorithm for large MIMO systems. © 2015 IEEE.