Coded data generation or conversion – Converter compensation
Reexamination Certificate
2006-06-30
2008-08-12
Nguyen, Khai M (Department: 2819)
Coded data generation or conversion
Converter compensation
C341S061000, C708S290000, C708S313000, C375S355000, C375S376000
Reexamination Certificate
active
07411531
ABSTRACT:
Methods and apparatus are provided for decimated interpolated clock/data recovery (ICDR) to perform asynchronous sampling of a received signal. A received signal is converted to a plurality of digital samples at a downsampled rate that is lower than a rate of the received signal. The plurality of digital samples are interpolated using a plurality of parallel interpolation filters operating at the downsampled rate. An output of each parallel interpolation filter is applied to a corresponding data detector operating at the downsampled rate to generate digital data. An estimate of a timing error is generated based on the digital data. The timing error values are processed to generate an interpolation phase value that is applied to the parallel interpolation filters. A recovered clock is optionally generated, having edges corresponding to a desired synchronous sampling period.
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Aziz Pervez M.
Mobin Mohammad S.
Agere Systems Inc.
Nguyen Khai M
Ryan & Mason & Lewis, LLP
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