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METHOD AND APPARATUS TO IMPROVE PERFORMANCE IN A MULTICARRIER MIMO CHANNEL USING THE HADAMARD TRANSFORM
METHOD AND APPARATUS TO IMPROVE PERFORMANCE IN A MULTICARRIER MIMO CHANNEL USING THE HADAMARD TRANSFORM
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机译:利用HADAMARD变换提高多载波MIMO信道性能的方法和装置
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摘要
The Hadamard transform is used to spread data within data blocks in a multicarrier MIMO system, before transmission. In this manner, the negative effects caused by the clustering of bad subcarriers (i.e., subcarriers having a low transmission coefficient due to fading) may be reduced. In at least one embodiment, a MAP-type detection scheme is used in the receiver to extract bit reliabilities from the received signals.
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