A Novel Four Single-Sideband M-QAM Modulation Scheme Using a Shadow Equalizer for MIMO System Toward 5G...

Area of Science:

• Wireless Communications
• Signal Processing
• Information Theory

Background:

• Single-sideband (SSB) modulation halves bandwidth but faces challenges in next-generation communication systems.
• Orthogonal Frequency Division Multiplexing (OFDM) is a key technology for 5G but presents implementation difficulties.
• Four single-sideband (4-SSB) modulation offers a promising high-order modulation approach for enhanced spectral efficiency.

Purpose of the Study:

• To propose a novel 4-SSB modulation scheme integrated with OFDM Guard Interval (GI) and massive MIMO for 5G.
• To enhance communication efficiency by reducing complexity and energy consumption in 5G systems.
• To address inter-symbol interference (ISI) introduced by Hilbert transforms in wireless environments.

Main Methods:

• Implementation of a 4-SSB modulation scheme over OFDM GI and massive MIMO.
• Application of a shadow equalizer algorithm at the receiver in both uncoded and coded (turbo codes) environments.
• Performance evaluation comparing the proposed system against existing 4-SSB approaches.

Main Results:

• The proposed 4-SSB over OFDM GI system demonstrates superior performance compared to other 4-SSB methods.
• The system achieves high efficiency with significantly lower complexity and energy consumption, even with turbo codes.
• The shadow equalizer algorithm provides effective 4-SSB realization with reduced computational load.

Conclusions:

• The novel 4-SSB over OFDM GI scheme is a practical and efficient solution for 5G communications.
• The integration of shadow equalization and turbo codes offers a low-complexity, energy-efficient approach.
• This work provides a viable method for mitigating ISI in 5G wireless environments.