Title :
Iterative Detection of OFDM Signals in Dispersive Fading Channels
Author :
Bu Xiangyuan ; Jiao Huiying ; An Jianping
Author_Institution :
Dept. of Electron. & Electr. Eng., Beijing Inst. of Technol.
Abstract :
This paper gives the ML and MMSE estimation of the time response of channel using pilot sequence and gives an iterative detection of transmitted signals using EM algorithm. A method of estimating the statistics of channel and operating noise power is also given, the simulation results show that MMSE method has good performance than ML, and the performance of the iterative detection is better when the number of the iteration increases. By using the estimation statistics of the channel and noise power, the performance can nearly approximate the perfect channel state information
Keywords :
OFDM modulation; channel estimation; dispersive channels; fading channels; least mean squares methods; signal detection; statistical analysis; MMSE estimation; OFDM signals; channel state information; channel statistical estimation; dispersive fading channels; iterative detection; signal transmission; time response; Dispersion; Fading; Iterative algorithms; Iterative methods; Maximum likelihood estimation; OFDM; Partial transmit sequences; Signal detection; Statistics; Time factors;
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.2006.69
