Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2007-01-16
2007-01-16
Tran, Khanh (Department: 2611)
Pulse or digital communications
Equalizers
Automatic
Reexamination Certificate
active
10328531
ABSTRACT:
A variable rate modulator maps an input data sequence DINinto a quadrature modulated output data sequence DOUTand then converts the DOUTdata sequence into an analog output signal AOUT. The data rate at which elements of the DINsequence are supplied as input to modulator10may vary, but the sample rate fsampat which elements of the DOUTsequence are produce remains constant. In producing the DOUTsequence, the modulator employs an interpolating root Nyquist filter having time-varying filter coefficients to provide both low pass filtration and interpolation.
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patent: 5412352 (1995-05-01), Graham
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patent: 6031431 (2000-02-01), Vinekar
patent: 6539064 (2003-03-01), Ellis et al.
patent: 6711214 (2004-03-01), Hershberger
Bedell Daniel J.
Realtek Semiconductor Corp.
Smith-Hill and Bedell
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