Design of SIMO SC-FDMA-DMWT Transceiver using Maximal-Ratio Combining in LoS Fading Channels.

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Bibliographic Details
Title:	Design of SIMO SC-FDMA-DMWT Transceiver using Maximal-Ratio Combining in LoS Fading Channels.
Authors:	Kadhim, Mohammed Aboud¹ makaboud@gmail.com, Ali, Mohammed Hussain² doctormohammed35@yahoo.com
Source:	Serbian Journal of Electrical Engineering. Oct2025, Vol. 22 Issue 3, p377-390. 14p.
Subjects:	MIMO systems, Long-Term Evolution (Telecommunications), Signal processing, Bit error rate, Radio transmitter-receivers
Abstract:	In this paper single-input multiple-output (SIMO) transceivers employing single-carrier Frequency Division Multiple Access with Discrete Multi-Wavelet Transform (SC-FDMA-DMWT) for 3GPP Long Term Evolution (LTE) uplink channels are considered. While SC-FDMA-DMWT traditionally underperforms compared to Orthogonal Frequency Division Multiplexing (OFDM) in Rayleigh fading, line-of-sight (LoS) components significantly enhance its resilience to fading. This study evaluates Maximal-Ratio Combining (MRC) effectiveness for SC-FDMA-DMWT through systematic comparison with Zero-Forcing (ZF) and Minimum Mean Square Error (MMSE) equalizers under varying LOS power levels and antenna correlations Monte Carlo simulations perform bit processing at the level of 2×106 per configuration for SNR that ranges from -5 to 25dB using realistic LTE channel models in both Rician and Rayleigh fading cases. Performance measures are BER analysis and diversity gain calculation. Results demonstrate that MRC-based SC-FDMA-DMWT achieves an 8-9dB BER improvement at 10-4 compared to conventional OFDM in LoS-dominant channels. The Frequency correlation impact becomes negligible with MRC implementation, indicating optimal signal combining performance, translating to 75-85% transmit power reduction in Dual-antenna SIMO structures, while preserving the natural low PAPR characteristics of the SC-FDMA scheme. Centralized 12-subcarrier assignments perform 4-6 dB better than decentralized 48-subcarrier settings. These results confirm that SIMO SC-FDMA-DMWT with MRC is a promising candidate for next-generation LTE uplink systems, particularly in macro and small cell deployments under dominant LoS propagation conditions. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	In this paper single-input multiple-output (SIMO) transceivers employing single-carrier Frequency Division Multiple Access with Discrete Multi-Wavelet Transform (SC-FDMA-DMWT) for 3GPP Long Term Evolution (LTE) uplink channels are considered. While SC-FDMA-DMWT traditionally underperforms compared to Orthogonal Frequency Division Multiplexing (OFDM) in Rayleigh fading, line-of-sight (LoS) components significantly enhance its resilience to fading. This study evaluates Maximal-Ratio Combining (MRC) effectiveness for SC-FDMA-DMWT through systematic comparison with Zero-Forcing (ZF) and Minimum Mean Square Error (MMSE) equalizers under varying LOS power levels and antenna correlations Monte Carlo simulations perform bit processing at the level of 2×106 per configuration for SNR that ranges from -5 to 25dB using realistic LTE channel models in both Rician and Rayleigh fading cases. Performance measures are BER analysis and diversity gain calculation. Results demonstrate that MRC-based SC-FDMA-DMWT achieves an 8-9dB BER improvement at 10-4 compared to conventional OFDM in LoS-dominant channels. The Frequency correlation impact becomes negligible with MRC implementation, indicating optimal signal combining performance, translating to 75-85% transmit power reduction in Dual-antenna SIMO structures, while preserving the natural low PAPR characteristics of the SC-FDMA scheme. Centralized 12-subcarrier assignments perform 4-6 dB better than decentralized 48-subcarrier settings. These results confirm that SIMO SC-FDMA-DMWT with MRC is a promising candidate for next-generation LTE uplink systems, particularly in macro and small cell deployments under dominant LoS propagation conditions. [ABSTRACT FROM AUTHOR]
ISSN:	14514869
DOI:	10.2298/SJEE240604004K