Robust relay beamforming for MIMO multi-relay networks with imperfect channel estimation

Abstract : In this paper, we consider a dual-hop Multiple Input Multiple Output (MIMO) wireless multi-relay network, in which a source-destination pair both equipped with multiple antennas communicates through multiple half-duplex amplify-and-forward (AF) relay terminals which are also with multiple antennas. Imperfect channel estimations for all nodes are considered. We propose a novel robust linear beamforming at the relays, based on the QR decomposition filter at the destination node which performs successive interference cancellation (SIC). Using Law of Large Number, we obtain the asymptotic rate, upon which the proposed relay beamforming is optimized. Simulation results show that the asymptotic rate matches with the ergodic rate well. Analysis and simulation results demonstrate that the pro- posed beamforming outperforms the conventional beamforming schemes.
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https://hal.telecom-paristech.fr/hal-02299998
Contributor : Olivier Rioul <>
Submitted on : Sunday, September 29, 2019 - 10:15:30 AM
Last modification on : Thursday, October 17, 2019 - 12:36:59 PM

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  • HAL Id : hal-02299998, version 1

Citation

Zijian Wang, Wen Chen, Benoit Geller, Olivier Rioul. Robust relay beamforming for MIMO multi-relay networks with imperfect channel estimation. IEEE Global Communications Conference (GLOBECOM 2013), Dec 2013, Atlanta, United States. ⟨hal-02299998⟩

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