Title :
A Rotation-Based Quasi-Orthogonal Space-Time Block Coded OFDM System over Frequency-Selective Channels
Author :
Lu, Xiaofeng ; Zhu, Guangxi ; Liu, Yingzhuang ; Xiao, Xiao
Author_Institution :
Dept. of Electron. & Inf. Eng., Huazhong Univ. of Sci. & Technol., Hubei
Abstract :
In this paper, we apply quasi-orthogonal space-time block code through constellation rotation (QOSTBC_CR) in OFDM system, construct the QOSTBC_CR-OFDM code and propose the decoder. Since OFDM can combat frequency-selective channels and the QOSTBC_CR have both full rate and full diversity, the QOSTBC_CR-OFDM performs effectively in frequency-selective channels. Simulation results show that QOSTBC_OR-OFDM achieves better tradeoff between transmission rate and diversity gain. This approves the theoretical analysis
Keywords :
OFDM modulation; block codes; channel coding; decoding; space-time codes; OFDM system; constellation rotation; decoder; frequency-selective channel; quasiorthogonal space-time block code; Block codes; Decoding; Diversity reception; Frequency diversity; MIMO; Modulation coding; OFDM modulation; Receiving antennas; Space technology; Transmitting antennas;
Conference_Titel :
Computer and Information Technology, 2005. CIT 2005. The Fifth International Conference on
Conference_Location :
Shanghai
Print_ISBN :
0-7695-2432-X
DOI :
10.1109/CIT.2005.45
