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Lattice Reduction Aided Preceding Based on Seysen's Algorithm for Multiuser MIMO Systems  

An, Hong-Sun (인하대학교 정보통신대학원 이동통신연구실)
Mohaisen, Manar (인하대학교 정보통신대학원 이동통신연구실)
Chang, Kyung-Hi (인하대학교 정보통신대학원 이동통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.9C, 2009 , pp. 915-921 More about this Journal
Abstract
Lenstra-Lenstra-Lovasz (LLL) algorithm, which is one of the lattice reduction (LR) techniques, has been extensively used to obtain better bases of the channel matrix. In this paper, we jointly apply Seysen's lattice reduction Algorithm (SA), instead of LLL, with the conventional linear precoding algorithms. Since SA obtains more orthogonal lattice bases compared to those obtained by LLL, lattice reduction aided (LRA) precoding based on SA algorithm outperforms the LRA precoding with LLL. Simulation results demonstrate that a gain of 0.5dB at target BER of $10^{-5}$ is achieved when SA is used instead of LLL or the LR stage.
Keywords
Seysen's Algorithm; Lattice Reduction; Multiuser-MIMO; Precoding; LLL Algorithm;
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