Title :
A New Algorithm for Channel Estimation Based on Pilot-Aided and EM in Software Radio OFDM System
Author :
Dingxue, Wu ; Jinwen, Tian
Author_Institution :
Inst. for Pattern Recognition & Artificial Intell., Huazhong Univ. of Sci. & Technol., Wuhan
Abstract :
In order to increase the transmission efficiency of OFDM system, considering the special structure of software radio OFDM system, this paper proposes gradient acceleration method of EM algorithm (nabla-EM) for OFDM systems channel estimation with pilot assisted symbol modulation expectation. The simulation result shows that the new method can reduce the complexity and iteration times, and it has also still lower BER compared to traditional method.
Keywords :
OFDM modulation; channel estimation; error statistics; iterative methods; software radio; BER performance; EM algorithm; channel estimation; complexity reduction; gradient acceleration method; iteration method; pilot assisted symbol modulation expectation; software radio OFDM system; Artificial intelligence; Bit error rate; Channel estimation; Communication system software; Demodulation; Fading; OFDM modulation; Pattern recognition; Software algorithms; Software radio; ?-EM algorithm; OFDM system; channel estimation; pilot; software radio;
Conference_Titel :
Communication Software and Networks, 2009. ICCSN '09. International Conference on
Conference_Location :
Macau
Print_ISBN :
978-0-7695-3522-7
DOI :
10.1109/ICCSN.2009.100
