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High-Performance Beamformer and Low-Complexity Detector for DF-Based Full-Duplex MIMO Relaying Networks

China Communications 2017年第2期14卷 173-182页

作者： Feng Shu Ye Zhou Riqing Chen Jin Wang Jun Li Branka Vucetic College of Computer and Information Sciences Fujian Agriculture and Forestry University Fuzhou 350002 China School of Mobile Network Nanjing Technology University Pujiang Institute Nanjing 21134 China School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing 210094 China National Mobile Communications Research Laboratory Southeast University Nanjing 210096 China School of Electrical and Information Engineering the University of Sydney NSW Australia

In this paper, we consider a *** *** ***(MIMO) relaying network with the ***(DF) protocol. Due to the *** transmissions, the *** from the relay transmitter to the relay receiver degrades the system performance. We thus propose an iterative beamforming structure(IBS) to mitigate the ***. In this method, the receive beamforming at the relay is optimized to maximize the ***(***), while the transmit beamforming at the relay is optimized to maximize the ***(***). To further improve the performance, the receive and transmit beamforming matrices are optimized between *** and *** in an iterative manner. Furthermore, in the presence of the residual ***, a *** ***(WF) maximum likelihood(ML) detector is proposed. In this detector, a WF is designed to transform a colored *** to a white noise, while the singular value decomposition is used to convert coupled spatial subchannels to parallelindependent ones. From simulations, we find that the proposed IBS performs much better than the existing schemes. Also, the proposed *** detector significantly reduces the complexity of the conventional ML(CML) detector from exponential time(an exponential function of the number of the source transmit antennas) to polynomial one while achieving a slightly better BER performance than the CML due to interference whitening.

关键词： decoding-and-forward MIMO relay full-duplex self-interference iterative beamforming

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