標題: | QRD-based Precoder Selection for Maximum-likelihood MIMO Detection |
作者: | Lin, Chun-Tao Wu, Wen-Rong 電機工程學系 Department of Electrical and Computer Engineering |
公開日期: | 2010 |
摘要: | Precoding is an effective method to improve the transmission quality in multiple-input multiple-output (MIMO) systems. In a real-world system, the precoder is selected from a codebook, and its index is fed back to the transmitter. For a maximum-likelihood (ML) receiver, the criterion for precoder selection is equivalent to maximizing the minimum distance of the received signal constellation. T he derivation of the optimum solution, however, may be of high computational complexity due to the requirement of the exhaustive search. To reduce the computational complexity, a suboptimum solution based on singular value decomposition (SVD) has been proposed in literature. In this paper, we propose using a QR decomposition (QRD) based method for precoder selection. To further improve the system performance, we also propose an enhanced QRD-based selection method. With Givens rotations, the computational complexity of the enhanced QRD-based method can be effectively reduced. Finally, we combine precoding with receive antenna selection, and use the proposed QRD-based methods to solve this joint optimization problem. Simulation results show that the proposed approaches can significantly improve the system performance. |
URI: | http://hdl.handle.net/11536/18943 http://dx.doi.org/10.1109/PIMRC.2010.5671891 |
ISBN: | 978-1-4244-8016-6 |
DOI: | 10.1109/PIMRC.2010.5671891 |
期刊: | 2010 IEEE 21ST INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC) |
起始頁: | 455 |
結束頁: | 460 |
Appears in Collections: | Conferences Paper |
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