Semi-Blind Receivers for Two-Hop MIMO Relay Systems with a Combined TSTF-MSMKron Coding

Area of Science:

• Wireless Communications
• Signal Processing
• Information Theory

Background:

• Increasing mobile stations necessitate enhanced wireless network quality and coverage.
• Cooperative relaying systems offer a promising solution for improving fifth-generation (5G) networks.

Purpose of the Study:

• Propose a novel TSTF-MSMKron coding for OFDM-CDMA MIMO relay systems.
• Enhance diversity gain and coverage in 5G wireless networks.

Main Methods:

• Developed a two-hop OFDM-CDMA MIMO relay system.
• Combined tensor space-time-frequency (TSTF) coding with multiple symbol matrices Kronecker product (MSMKron).
• Derived two semi-blind receivers utilizing generalized Tucker models for joint symbol matrix and channel estimation.

Main Results:

• Established necessary conditions for parameter identifiability for the proposed receivers.
• Demonstrated the impact of design parameters on symbol error rate (SER) using Monte Carlo simulations with a zero-forcing (ZF) receiver.
• Validated the effectiveness of TSTF-MSMKron coding and semi-blind receivers in increasing diversity gain.

Conclusions:

• The proposed TSTF-MSMKron coding significantly enhances diversity gain in cooperative relaying systems.
• The developed semi-blind receivers effectively estimate channels and symbol matrices.
• The TSTF-MSMKron coding and receivers are crucial for advancing 5G wireless network performance.