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: Conference contribution同行評審

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English
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Published - 1 十二月 2015
事件26th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015 - Hong Kong, China
持續時間: 30 八月 20152 九月 2015

出版系列

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

Conference

Conference26th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2015
國家China
城市Hong Kong
期間30/08/152/09/15

指紋 深入研究「Channel-aware local search (CA-LS) for iterative MIMO detection」主題。共同形成了獨特的指紋。

引用此