Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2007-06-26
2007-06-26
Phu, Phuong (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S232000, C375S233000, C375S229000, C708S300000, C708S322000, C708S323000
Reexamination Certificate
active
10979031
ABSTRACT:
Subtraction of a signal111from a pulse response110, where signal111provides a good approximation of the tail of pulse response110, can provide a method for canceling the tail of pulse response110.For continuous data streams, signals X(t),223and Y(t) can correspond to, respectively, signals110, 111and112. X(t) differs from110in being a continuous data stream.223differs from111in being the low pass filtering of X(t), such low pass filtering accomplished by a unit LPF211. Y(t) differs from112in being a continuous stream of equalized data, produced by subtracting the signal at223from X(t).A measurement unit213, analysis unit214and decision unit215can act to continuously adapt LPF211such that tail cancellation equalization is continuously achieved.Measurement unit213can construct, from Y(t), a set of correlation measurements that can be used to adapt LPF211.
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Krishna Kannan
Sonntag Jeffrey Lee
Stonick John Theodore
Park Vaughan & Fleming LLP
Phu Phuong
Synopsys Inc.
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