Title :
Complexity reduction for lattice reduction aided detection in MIMO-OFDM systems
Author :
Choi, Byoung Joon ; An, Chan-ho ; Yang, Janghoon ; Jang, Seung-hoon ; Kim, Dong Ku
Author_Institution :
Sch. of Electr. & Electron. Eng., Yonsei Univ., Seoul, South Korea
Abstract :
A Lattice reduction (LR) aided receiver for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems can achieve near ML detector performance. However, Performing LR for each subcarrier can result in a large complexity. To deal with this problem, a low complexity scheme for lattice reduction (LR) aided detection in the MIMO OFDM system is presented. From exploiting frequency correlation among the neighboring channel matrix and the uni-modular transformation matrix of the preceding subcarrier, nearly LR reduced channel matrix is produced. Simulation results show that the proposed scheme can achieve the same performance with the conventional system while its complexity is significantly lower.
Keywords :
MIMO communication; OFDM modulation; communication complexity; radio receivers; Lattice reduction aided receiver; MIMO-OFDM systems; complexity reduction; large complexity; lattice reduction aided detection; multiple-input multiple-output systems; orthogonal frequency division multiplexing systems; uni-modular transformation matrix; Detectors; Equalizers; Frequency conversion; Lattices; MIMO; Matrix converters; Maximum likelihood detection; Narrowband; OFDM modulation; Time domain analysis; Frequnecy Correlation; Lattice Reduction; MIMO-OFDM;
Conference_Titel :
Computer and Automation Engineering (ICCAE), 2010 The 2nd International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-5585-0
Electronic_ISBN :
978-1-4244-5586-7
DOI :
10.1109/ICCAE.2010.5451812