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Title: Cooperative precoding with limited feedback for MIMO interference channels
Authors: Huang, K.
Zhang, R. 
Keywords: cooperative communication
Interference channels
limited feedback
multi-antenna system
Issue Date: Mar-2012
Source: Huang, K., Zhang, R. (2012-03). Cooperative precoding with limited feedback for MIMO interference channels. IEEE Transactions on Wireless Communications 11 (3) : 1012-1021. ScholarBank@NUS Repository.
Abstract: Multi-antenna precoding effectively mitigates the interference in wireless networks. However, the resultant performance gains can be significantly compromised in practice if the precoder design fails to account for the inaccuracy in the channel state information (CSI) feedback. This paper addresses this issue by considering finite-rate CSI feedback from receivers to their interfering transmitters in the two-user multiple-input-multiple-output (MIMO) interference channel, called cooperative feedback, and proposing a systematic method for designing transceivers comprising linear precoders and equalizers. Specifically, each precoder/equalizer is decomposed into inner and outer components for nulling the cross-link interference and achieving array gain, respectively. The inner precoders/equalizers are further optimized to suppress the residual interference resulting from finite-rate cooperative feedback. Furthermore, the residual interference is regulated by additional scalar cooperative feedback signals that are designed to control transmission power using different criteria including fixed interference margin and maximum sum throughput. Finally, the required number of cooperative precoder feedback bits is derived for limiting the throughput loss due to precoder quantization. © 2012 IEEE.
Source Title: IEEE Transactions on Wireless Communications
ISSN: 15361276
DOI: 10.1109/TWC.2012.011812.110063
Appears in Collections:Staff Publications

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