New Blind Adaptive Channel Estimation Schemes Based on OFDM Systems

Abstract:

Two new blind estimation schemes based on decorrelation LMS（DLMS）and time-domain orthogonal LMS（TDO-LMS） algorithms are proposed to solve the problem of convergence in the estimation scheme based on LMS algorithm in wireless mobile communication OFDM systems. These schemes are improved on the traditional LMS algorithm.The factor of TDO-LMS algorithm changes along with the power of signal ,and the decorrelation LMS removes the correlation of the signal.Two methods can get faster convergence and better estimation performance combining with alterable step in the channel estimation of OFDM systems.Simulation shows that the convergence of the schemes proposed is better than that in the channel estimation based on the traditional LMS algorithm obviously.

• Periodical: Advanced Materials Research (Volume 709)
• Pages: 370-373
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.709.370
• Online since: June 2013
• Authors: Guo Jun Chen, Han Ying Hu
• Keywords: Blind, Channel Estimation, DLMS, OFDM Systems, TDO-LMS

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