Title :
LLL lattice reduction-based detection of joint VBLAST and SFBC in MIMO/OFDM systems
Author :
Wen, Xue ; Wang, Jun ; Tang, Youxi ; Li, Shaoqian
Author_Institution :
Nat. Key Lab. of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
We propose a VBLAST and space-frequency block codes (SFBC) joint transmit scheme to exploit both multiplexing and diversity gain in MIMO/OFDM systems. LLL (Lenstra-Lenstra-Lova´sz) lattice reduction (Lenstra, A.K. et al., 1982) is applied before the signal detection to improve the bit error rate (BER) performance. Computer simulation results show that the proposed scheme significantly exploits diversity gain while a high data rate is obtained. At the same time, the simulation results confirm that the BER performance is improved obviously when LLL lattice reduction is applied to the channel matrix.
Keywords :
MIMO systems; OFDM modulation; block codes; diversity reception; error statistics; lattice theory; matrix algebra; signal detection; BER; Lenstra-Lenstra-Lovasz lattice reduction; MIMO-OFDM systems; VBLAST; bit error rate; channel matrix; diversity gain; joint transmit scheme; multiplexing; signal detection algorithms; space-frequency block codes; vertical BLAST; Bit error rate; Block codes; Computer simulation; Diversity methods; Lattices; MIMO; OFDM; Receiving antennas; Space technology; Transmitting antennas;
Conference_Titel :
Communications, Circuits and Systems, 2005. Proceedings. 2005 International Conference on
Print_ISBN :
0-7803-9015-6
DOI :
10.1109/ICCCAS.2005.1493391
