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BER of LDPC-Coded Single-Carrier LOS-MIMO Using FDE in 3GPP TDL Channel Models

The application of line-of-sight (LOS)- multiple-input multiple-output (MIMO) to the back-haul or fronthaul between a macro-cell and small cells is promising from the viewpoint of low-cost deployment in 4G and 5G cellular heterogeneous networks. This paper presents the bit error rate (BER) performance of low-density parity-check (LDPC)-coded single-carrier 2 × 2 LOS-MIMO using frequency domain equalization (FDE) in the 3rd generation partnership project (3GPP) tapped delay line (TDL) channel models. Computer simulation results show that the average BER of less than 10−8 is achieved with the LDPC coding rate of R = 1/2 or lower in TDL-D and E channel models with the number of non-line-of-sight (NLOS) delayed paths of LNLOS = 13 and 14, that suffer from independent Rayleigh fading. Moreover, we show that high quality such as the average BER of 10−8 is achieved for LDPC- coded 2 × 2 LOS-MIMO using FDE when LNLOS is equal to five or fewer even with the high coding rate of 8/9 in the TDL-E channel model.