Journal of Applied Sciences ›› 2012, Vol. 30 ›› Issue (6): 581-587.doi: 10.3969/j.issn.0255-8297.2012.06.004

• Communication Engineering • Previous Articles     Next Articles

Estimation of Fast Fading Channel for OFDM Systems Using Compressed Channel Expression

FANG Yong1,2, ZHAO Wei-jie1,2, WANG Min1,2   

  1. 1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China
    2. Key Laboratory of Speciality Fiber Optics and Optical Access Networks, Shanghai 200072, China
  • Received:2011-06-13 Revised:2011-11-16 Online:2012-11-27 Published:2011-11-16

Abstract:  An algorithm using channel compressed expression for estimation of fast fading channel in orthogonal frequency division multiplexing (OFDM) systems is proposed. Specifically, a compressed channel expression based on compact channel impulse response (CIR) matrix and channel kernel vector is introduced, and an equivalent channel model is derived. Both least square (LS) and linear minimum mean square error (LMMSE) estimators are formulated to estimate the channel kernel vector. The CIR matrix is reconstructed from the channel kernel vector. Simulation results show that the proposed algorithm has better estimation accuracy and lower BER as compared to some existing estimation techniques.

Key words: fast fading, channel estimation, orthogonal frequency division multiplexing (OFDM), compressed channel expression

CLC Number: