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A Novel Compute-and-Forward Relaying Method for Multi-Antenna Wireless Relay Networks.
Xuan Yang1, Jiaqi Yan1, Yonggang Xu1
1School of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, China.
Entropy (Basel, Switzerland)
|November 24, 2023
Summary
Successive Extended Compute-and-Forward (SECoF) enhances wireless relay networks by combining matrix projection and interference cancellation. This novel approach improves network performance and overcomes limitations of traditional methods.
Area of Science:
- Wireless Communications
- Network Coding
- Signal Processing
Background:
- Traditional Compute-and-Forward (CoF) enables receivers to utilize interference in wireless communications by performing integer combinations of transmitted codewords.
- Existing CoF methods face challenges including rank failure, single antenna limitations, and the shortest vector problem, hindering performance in complex networks.
- There is a need for advanced CoF strategies to address these limitations in multi-source, multi-relay, and multi-antenna wireless relay networks.
Purpose of the Study:
- To introduce and analyze a novel Successive Extended Compute-and-Forward (SECoF) strategy for advanced wireless relay networks.
- To overcome the limitations of traditional CoF, specifically rate degradation and rank failure.
- To enhance overall network performance in terms of computation rate, rank failure probability, and outage probability.
Main Methods:
- Developed SECoF by integrating matrix projection and successive interference cancellation techniques.
- Employed the LLL lattice-based resolution algorithm to find approximate solutions for integer-value coefficient vectors.
- Derived concise mathematical formulas for the SECoF strategy.
Main Results:
- The proposed SECoF method effectively overcomes the rate tending to zero and rank failure issues inherent in traditional CoF.
- SECoF demonstrates strong robustness and significantly improves network performance compared to existing state-of-the-art methods.
- Simulation results validate the superior performance of SECoF in terms of computation rate, rank failure probability, and outage probability.
Conclusions:
- SECoF presents a pioneering and effective solution for multi-source, multi-relay, and multi-antenna wireless relay networks.
- The integration of matrix projection and successive interference cancellation provides a robust framework for interference utilization.
- SECoF offers a significant advancement in physical layer network coding, enhancing the efficiency and reliability of wireless communication systems.
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