Title :
An Improved Norm-Based User Selection Algorithm for Multiuser MIMO Systems with Block Diagonalization
Author :
Zhu Youtuan ; Tang Zhihua ; Zhu Jinkang
Author_Institution :
Univ. of Sci. & Technol. of China, Hefei
Abstract :
This paper presents an improved norm-based user selection algorithm for multiuser MIMO systems with block diagonalization. Our motivation is to reduce the complexity of the original norm-based algorithm while keeping the throughput performance. The main ideas consist of applying a heuristic Gram-Schmidt orthogonalization in the design of precoding matrix and constructing a user-reduced set that is semiorthogonal to the already selected users in each iteration. Numerical examples demonstrate the effectiveness of our proposed algorithm. The low computational complexity makes it very suitable for implementation in a practical system.
Keywords :
MIMO communication; multiuser channels; block diagonalization; heuristic Gram-Schmidt orthogonalization; multiuser MIMO systems; norm-based user selection algorithm; precoding matrix; Base stations; Channel state information; Computational complexity; Downlink; Interference; MIMO; Multiaccess communication; Receiving antennas; Throughput; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2007. VTC-2007 Fall. 2007 IEEE 66th
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-0263-2
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2007.136
