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

fYear

2009

fDate

27-28 Feb. 2009

Firstpage

341

Lastpage

345

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication Software and Networks, 2009. ICCSN '09. International Conference on

Conference_Location

Macau

Print_ISBN

978-0-7695-3522-7

Type

conf

DOI

10.1109/ICCSN.2009.100

Filename

5076869