Title :
A Novel Blind Channel Estimation for Space-Time Coded OFDM on Time Varying Mobile Radio Channels
Author :
Chen, Zhigang ; Zhang, Taiyi ; Gong, Zhengwei
Author_Institution :
Sch. of Electron. & Inf. Eng., Xi´´an Jiaotong Univ.
Abstract :
A novel blind channel estimation scheme is presented for space-time coded OFDM (STC-OFDM) systems. This scheme obtains the channel estimates by exploiting the priori knowledge of the mapping constellation and the minimum leakage method, rather than the statistical properties of signals, and requires short data records especially for moderate and high SNRs, thus can achieve competitive performance in time varying channels. Simulation results comparing this scheme with a training-based scheme in time varying channels are presented
Keywords :
OFDM modulation; channel estimation; mobile radio; space-time codes; time-varying channels; wireless channels; SNR; blind channel estimation; mapping constellation; minimum leakage method; orthogonal frequency division multiplexing; signal to noise ratio; space-time coded OFDM; time varying mobile radio channels; training-based scheme; Bandwidth; Blind equalizers; Channel estimation; Constellation diagram; Convergence; Land mobile radio; OFDM; Receiving antennas; Signal mapping; Transmitting antennas;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2006. WiCOM 2006.International Conference on
Conference_Location :
Wuhan
Print_ISBN :
1-4244-0517-3
DOI :
10.1109/WiCOM.2006.55
