Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2005-11-08
2005-11-08
Phu, Phuong (Department: 2631)
Pulse or digital communications
Equalizers
Automatic
C375S230000, C375S229000, C708S322000, C708S323000
Reexamination Certificate
active
06963604
ABSTRACT:
An iterative method of equalizing an input signal received over a digital communication channel can include (a) using a kernel density estimate where different values of a kernel size are indicative of either a blind or a decision-directed equalization mode, (b) processing a received signal using a blind equalization mode, and (c) evaluating, on a block or sample basis, an error measure based on a distance among a distribution of an equalizer output and a constellation. The method also can include (d) updating the kernel size based upon the error measure thereby facilitating automatic switching between the blind and decision-directed equalization modes, where the kernel size is initially set to a value indicative of the blind equalization mode. The method additionally can include (e) selectively applying blind equalization or decision-directed equalization to the input signal according to the updated kernel size for subsequent iterations of steps (c)-(e).
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Erdogmus Deniz
Lazaro Marcelino
Principe Jose Carlos
Santamaria Ignacio
Phu Phuong
Senterfitt Akerman
University of Florida Research Foundation Inc.
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