Design of SIMO SC-FDMA-DMWT transceiver using maximal-ratio combining in LoS fading channels

In this paper single-input multiple-output (SIMO) transceiversemploying single-carrier Frequency Division Multiple Access with DiscreteMulti-Wavelet Transform (SC-FDMA-DMWT) for 3GPP Long Term Evolution(LTE) uplink channels are considered. While SC-FDMA-DMWT traditionallyunderperforms compared to Orthogonal Frequency Division Multiplexing(OFDM) in Rayleigh fading, line-of-sight (LoS) components significantlyenhance its resilience to fading. This study evaluates Maximal-Ratio Combining(MRC) effectiveness for SC-FDMA-DMWT through systematic comparison withZero-Forcing (ZF) and Minimum Mean Square Error (MMSE) equalizers undervarying LOS power levels and antenna correlations Monte Carlo simulationsperform bit processing at the level of 2?10? per configuration for SNR that rangesfrom -5 to 25dB using realistic LTE channel models in both Rician and Rayleighfading cases. Performance measures are BER analysis and diversity gaincalculation. Results demonstrate that MRC-based SC-FDMA-DMWT achieves an8-9dB BER improvement at 10?? compared to conventional OFDM in LoSdominantchannels. The Frequency correlation impact becomes negligible withMRC implementation, indicating optimal signal combining performance. %85-75transmit power is reduced in Dual-antenna SIMO structures while preserving thenatural low PAPR characteristics of the SC-FDMA scheme. Centralized 12-subcarrier assignments perform 4-6 dB better than decentralized 48-subcarriersettings. These results confirm that SIMO SC-FDMA-DMWT with MRC is apromising candidate for next-generation LTE uplink systems, particularly inmacro and small cell deployments under dominant LoS propagation conditions.