Linear beamformer schemes with simple relay selection in MIMO relay networks |
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Authors: | MENG Qing-min PAN Su ZHENG Bao-yu ZHU Hong-bo YOU Xiao-hu |
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Affiliation: | [1]Jiangsu Key Laboratory of Wireless Communications and Institute of Signal Processing and Transtnission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China; [2]National Mobile Communications Research Lab, Southeast University, Nanjing 210096, China |
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Abstract: | This article considers a wireless multi-hop/mesh network where single multi-antenna source-destination pair communicates through a selected relay subset using simple relay selection under the constraint of fixed relay's number. Compared with random selection, the simple relay selection can yield certain capacity advantages while linear zero-forcing (ZF) receiver and linear beamformer are considered at the relay. For match-filter (MF) beamformer and amplified-and-forward (AF) beamformer with a fixed number of relays, the capacities are given. Furthermore, we extend the simple selection methods to the relaying scheme with orthogonal-triangular (QR) beamformer and investigate these linear beamformer schemes over spatially correlated multi-input multi-output (MIMO) links for both the backward and forward channel over the two-hop MIMO relay networks. |
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Keywords: | wireless mesh networks multi-hop relaying capacity beamformer |
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