Enhanced EM-based channel estimation for MIMO-OFDM in highly mobile channels |
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| Authors: | CHEN Dong-hua and QIU Hong-bing |
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| Affiliation: | CHEN Dong-hua1,QIU Hong-bing 1,2(1.School of Telecommunications Engineering,Xidian University,Xi'an 710071,China,2.Department of Communication and Information Engineering,Guilin University of Electronic Technology,Guilin 541004,China) |
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| Abstract: | An enhanced expectation-maximization(EM)-based iterative channel estimator for coping with channel time variation is proposed for mobile multiple-input multi-output orthogonal frequency division multiplexing(MIMO-OFDM)systems.In the proposed scheme,the recursive least squares(RLS)algorithm is applied to track the time-varying channel impulse response(CIR)within several symbols.By using the tracked time-varying CIR,the ICI are constructed and then cancelled from the received signal,thus reducing their impact... |
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| Keywords: | multiple input multiple output(MIMO) orthogonal frequency division multiplexing(OFDM) channel estimation expectation maximization(EM)algorithm intercarrier interference |
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