Pulse or digital communications – Receivers
Reexamination Certificate
2007-12-27
2011-12-27
Tran, Khai (Department: 2611)
Pulse or digital communications
Receivers
Reexamination Certificate
active
08085873
ABSTRACT:
Disclosed herein are methods and apparatus for enhancing the estimation of channel response in a wireless communication system. An apparatus (and associated method) for optimizing channel estimation in a communication system includes a receiving antenna; a receiver adapted to receive a signal from the receiving antenna; an initial channel estimator module adapted to select a selected channel from among one or more channels in the communication system and to determine, for the selected channel, an initial channel estimate based upon the received signal; a transformation module adapted to transform the initial channel estimate into an initial impulse response estimate comprising a sequence of samples; a filtering module adapted to select a sub-sequence of samples from the sequence of samples and generate a truncated initial impulse response estimate by setting to zero the samples in the initial impulse response estimate that are not in the selected sub-sequence of samples; and a maximum likelihood channel estimating module adapted to compute a time domain weighted impulse response estimate using the truncated time domain impulse response estimate for the selected channel and to compute a maximum likelihood channel estimate for the selected channel by transforming the time domain weighted impulse response estimate into the frequency domain.
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Bjerke Bjorn
Howard Steven J.
QUALCOMM Incorporated
Qualcomm Patent Group
Tran Khai
Yancey, Jr. James H.
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