System for selecting a sample phase based on channel capacity
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United States of America Patent
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Issued Date -
Jun 30, 2011
app pub date -
Oct 21, 2010
filing date -
Dec 24, 2009
priority date (Note) -
Abandoned
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Abstract
The present invention provides a system for selecting a sample phase based on channel capacity. A synchronizer calculates a carrier frequency offset, a sample timing offset, a sampling conversion rate and a frame timing, and counts the candidate sample phases. A digital mixer conducts frequency offset compensation to produce a frequency compensated baseband signal. An interpolator conducts interpolation to compensate and produce an interpolated baseband signal. A digital matched filter performs filtering to produce an over-sampled and filtered baseband signal. A buffer stores the over-sampled and filtered baseband signal. A channel estimator estimates and produces channel frequency responses. A sample phase selector calculates channel capacity corresponding to each candidate sample phase, and selects the one with maximum channel capacity. A down-sampler conducts down-sampling operation to produce the final symbol rate based baseband signal. As such, symbol synchronization can be achieved with enhanced performance.
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