METHOD FOR COHERENT AND NON COHERENT DEMODULATION
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United States of America Patent
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Issued Date -
Apr 4, 2013
app pub date -
Jan 6, 2012
filing date -
Oct 1, 2011
priority date (Note) -
Abandoned
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Abstract
Methods for coherent and non-coherent demodulation are disclosed. Embodiments herein relate to wireless communication systems, and more particularly, to demodulating block orthogonal codes in wireless communication systems. Coherent detection of signals provides improved performance at higher complexity of implementation, but it can be difficult to keep the frequency errors in a wireless communications receiver within the required limits for coherent detection. Embodiments disclosed enable means of using coherent demodulation for block orthogonal codes in the presence of high frequency errors, through the use of techniques of frequency prediction, estimation and correction. Further, it enables a low complexity frequency estimator which provides high estimation range and accuracy.
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