Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Reexamination Certificate
2008-04-22
2008-04-22
Ghayour, Mohammed (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
C375S149000, C375S130000, C375S346000, C375S354000, C375S355000
Reexamination Certificate
active
07362812
ABSTRACT:
A channel tracking module, configured for generating updated equalization coefficients for a frequency equalizer, is configured for determining a digital-based error value between equalized signals output by the frequency equalizer relative to predicted signals, for each subcarrier frequency of an OFDM symbol. The channel tracking module determines an accumulated error based on accumulating the digital-based error values for all the subcarrier frequencies of the OFDM symbol, for a prescribed successive number of OFDM symbols. The channel tracking module also determines a step size based on the accumulated error and relative to a prescribed step function configured for optimizing equalizer adjustments within stability limits. The channel tracking updates the equalization coefficients for each subscarrier frequency based on the accumulated error and the step size. Hence, the channel tracking module can be implemented in an economical manner while ensuring optimum equalizer adjustments within stability limits that ensure convergence of the equalization coefficients.
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Hou Ping
Li Yong
Advanced Micro Devices , Inc.
Ghayour Mohammed
Manelli Denison & Selter PLLC
Torres Juan Alberto
Turkevich Leon R.
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