1. Partial Zero-Forcing for Multi-Way Relay Networks.
- Author
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Rahimian, Samira, Zhang, Wuhua, Noori, Moslem, Jing, Yindi, and Ardakani, Masoud
- Subjects
WIRELESS communications ,SIGNAL processing ,BEAMFORMING ,SIMULATION methods & models ,DEGREES of freedom - Abstract
The ever increasing demands for mobile network access have resulted in a significant increase in bandwidth usage. By improving the system spectral efficiency, multi-way relay networks (MWRNs) provide promising approaches to address this challenge. In this paper, we propose a novel linear beamforming design, namely partial zero-forcing (PZF), for MWRNs with a multiple-input-multiple-output relay. Compared to zero-forcing (ZF), PZF relaxes the constraints on the relay beamforming matrix such that only partial user-interference, instead of all, is canceled at the relay. The users eliminate the remaining interferences through self-interference and successive interference cancellation. A sum-rate maximization problem is formulated and solved to exploit the extra degrees-of-freedom resulted from PZF. Simulation results show that the proposed PZF relay beamforming design achieves significantly higher network sum-rates than the existing linear beamforming designs. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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