Demodulation method and demodulator for orthogonal frequency multiplexing—multiple input multiple output system
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United States of America Patent
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Oct 1, 2013
Grant Date -
Jul 19, 2012
app pub date -
May 17, 2010
filing date -
Sep 28, 2009
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Abstract
A demodulation method and a demodulator for an OFDM MIMO system are provided, and by using a received reference signal, the channel estimation value at the reference signal sub-carrier in each channel is obtained by estimation; by using the channel estimation value, an equalization matrix at the reference signal sub-carrier is obtained; by using the obtained equalization matrix to carry out the interpolation calculation, equalization matrixes are obtained; by using the data signals in various paths and corresponding equalization matrixes, an intermediate estimation value is obtained by calculation; by using a precoding matrix to carry out de-precoding on the intermediate estimation value, a final estimation value is obtained. The demodulator comprises an OFDM demodulation module, a frame parsing module, a precoding matrix generation module, a partial channel estimation module, a partial equalization matrix generation module, an equalization matrix interpolation module, a MIMO demodulation module and a de-precoding module.
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