Analyzing Impacts of Spatial Correlation for Multi-user Environment with Robust Concatenation of Advanced FEC Schemes

Abstract

In recent days, the enhancement of MIMO in the area of wireless communications with spatial correlation characteristics by means of the forward-error-correction (FEC) techniques has been introduced as a vital technology. To overcome the limitations of the FEC in MIMO–OFDM systems, this paper introduces the effect of spatial correlation in FEC for multi-user MIMO–OFDM system. Here, the error correction codes (ECC) namely low-density parity check (LDPC-CC), turbo code CC, convolutional code (CC) and Reed–Solomon code (RSC-CC), and polar code CC (PC-CC) are authenticated for three channel representations known as Rayleigh, Rician and additive white Gaussian noise for multi-user (MU) with 8 users and single user MIMO–OFDM system. The investigation is carried out by means of four modulation techniques like, binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), quadrature amplitude modulation (QAM)-16 and QAM-64. It is done under three antenna configurations like 2 × 2, 2 × 4, and 4 × 4. In addition, the peak signal to noise ratio is deployed to recognize the image transmission and the bit error rate, is employed to recognize the data transmission. Furthermore, from the experimental results, the PC-CC in MU system is found to offer better performance than the other configurations.