High speed modem and method having jitter-free timing recovery
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United States of America Patent
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Nov 17, 1998
Grant Date -
N/A
app pub date -
Oct 22, 1996
filing date -
Oct 22, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for reliable and jitter-free timing recovery in high speed modems which utilizes the correlations of the received data signal points and the demodulated baseband signal samples feeding into a fractionally-spaced adaptive equalizer. This correlation based approach bypasses calculation of the exact transmitter symbol rate as required in traditional timing recovery methods. Also, the receiver timing adjustments are done via the transformed domain by shifting the taps of the adaptive equalizer. No time domain signal sample interpolation is necessary, so that truly jitter-free timing recovery is realized.
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