Robust Filter-and-forward Beamforming Design for Two-way Multi-antenna Relaying Networks

Authors:
Zesong Fei;Niwei Wang;Chengwen Xing;Shuo Li;Jiqing Ni;Jingming Kuang
Affiliations:
School of Information and Electronics, Beijing Institute of Technology, Beijing, China;School of Information and Electronics, Beijing Institute of Technology, Beijing, China;School of Information and Electronics, Beijing Institute of Technology, Beijing, China;School of Information and Electronics, Beijing Institute of Technology, Beijing, China;School of Information and Electronics, Beijing Institute of Technology, Beijing, China;School of Information and Electronics, Beijing Institute of Technology, Beijing, China
Venue:
Mobile Networks and Applications
Year:
2013

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Abstract

In this paper, we investigate a robust filter-and-forward (FF) beamforming design for two-waymulti-antenna relaying networks, where multiple relays assist two terminals to exchange information. With Gaussian distributed channel errors, the proposed robust beamforming design aims at maximizing the signal-to-interference-plus-noise-ratio (SINR) under individual transmit power constraints at each relay. Exploiting the elegant convex optimization mathematical tools, the optimization problem can be efficiently solved. Finally, simulation results demonstrate that the proposed robust beamformer reduces the sensitivity of the two-way multi-antenna relay networks to channel estimation errors, and outperforms the algorithm with estimated channels only. Moreover, the length of robust beamformer also influences the system performance.