Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2006-04-25
2006-04-25
Corrielus, Jean (Department: 2637)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S348000, C375S349000, C708S819000
Reexamination Certificate
active
07035361
ABSTRACT:
A Signal Conditioning Filter (SCF) and a Signal Integrity Unit (SIU) address the coupled problem of equalization and noise filtering in order to improve signal fidelity for decoding. Specifically, a received signal can be filtered in a manner to optimize the signal fidelity even in the presence of both significant (large magnitudes of) ISI and noise. The present invention can provide an adaptive method that continuously monitors a signal fidelity measure. Monitoring the fidelity of a multilevel signal can be performed by external means such as by the SIU. A received signal y(t) can be “conditioned” by application of a filter with an electronically adjustable impulse response g(t). A resulting output z(t) can then be interrogated to characterize the quality of the conditioned signal. This fidelity measure q(t) can be used to adjust the filter response to maximize the fidelity measure of the conditioned signal.
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Bajekal Sanjay
Hietala Vincent Mark
Kim Andrew Joo
Corrielus Jean
Ghulamali Qutub
King & Spalding LLP
Quellan Inc.
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