【摘 要】
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In doubly-selective fading wireless channel, the conventional orthogonal frequency division multiplexing (OFDM) receivers for inter-carrier interference (ICI) c
【机 构】
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School of Information Sciences and Engineering,State Key Laboratory of Information Security
论文部分内容阅读
In doubly-selective fading wireless channel, the conventional orthogonal frequency division multiplexing (OFDM) receivers for inter-carrier interference (ICI) compensation require extensive computations. To obtain an effective balance between performance and complexity, the whole channel response matrix was decomposed into a sequence of submatrix, and then a novel equalizer based on minimum mean square error (MMSE) criterion was presented to combat the ICI. Furthermore, a simple ordering-based decision-feedback equalizer (DFE) was derived to exploit the temperal diversity gain offered by mobile channels. Numerical studies illustrate that although the MMSE equalizer still suffers from error floor, whereas the DFE equalizer exhibits significant performance improvement. The advantage of the proposed scheme indicates its potential applications in the future broadband wireless systems.
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