Channel-aware local search (CA-LS) for iterative MIMO detection

I. Wei Lai, Chia Han Lee, Gerd Ascheid, Heinrich Meyr, Tzi Dar Chiueh

研究成果: 書貢獻/報告類型會議論文篇章

3 引文 斯高帕斯(Scopus)

摘要

We propose an efficient iterative multiple-input multiple-output (MIMO) detection algorithm based on the local search. Specifically, since the MIMO channel matrix twists the lattice structure of the received symbols, the proposed channel-aware local search (CA-LS) defines its search neighborhood according to the instantaneous channel realization. Such channel-dependent neighborhood can be efficiently identified by using the sphere decoder in a set that comprises the differences between pairs of QAM vectors, which is termed as delta vectors. The delta vectors with small quadratic norms with respect to the channel matrix are identified and then used as the search directions of the CA-LS. Features like sparsity and non-uniformity of delta vectors are exploited to reduce the SD complexity. Furthermore, by reformulating the detection criterion, the log-likelihood ratio (LLR) computations and searches of the CA-LS are greatly simplified. Numerical simulations demonstrate that compared with other practical iterative MIMO detectors, e.g., the list sphere decoder, the CA-LS achieves superior performance in both error rate and complexity aspects.

原文英語
主出版物標題2015 IEEE 26th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015
發行者Institute of Electrical and Electronics Engineers Inc.
頁面731-736
頁數6
ISBN(電子)9781467367820
DOIs
出版狀態已發佈 - 2015 12月 1
對外發佈
事件26th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015 - Hong Kong, 中国
持續時間: 2015 8月 302015 9月 2

出版系列

名字IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
2015-December

會議

會議26th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015
國家/地區中国
城市Hong Kong
期間2015/08/302015/09/02

ASJC Scopus subject areas

  • 電氣與電子工程

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