Title :
A pilot based EM channel estimator for OFDM systems
Author :
Yun, Chen ; Zhi, Liu ; Xiaoyang, Zeng
Author_Institution :
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai
Abstract :
A pilot based EM channel estimator is proposed. The channels are estimated using the EM (expectation-maximization) algorithm, while making use of pilot tones to obtain the initial estimate for iterative steps. Simulation results show that the bit error rate (BER) can be significantly reduced compared with conventional algorithm and iterative times are less than the common EM algorithm. VLSI architecture for the algorithm is proposed
Keywords :
OFDM modulation; VLSI; channel estimation; error statistics; expectation-maximisation algorithm; OFDM systems; VLSI architecture; bit error rate; channel estimator; expectation-maximization algorithm; pilot tones; Application specific integrated circuits; Bit error rate; Channel estimation; Frequency estimation; Iterative algorithms; Laboratories; Neodymium; OFDM; Quadrature phase shift keying; Very large scale integration; Channel Estimation; EM algorithm; OFDM;
Conference_Titel :
ASIC, 2005. ASICON 2005. 6th International Conference On
Conference_Location :
Shanghai
Print_ISBN :
0-7803-9210-8
DOI :
10.1109/ICASIC.2005.1611502
