Pre-equalization for low-cost DTV translators

Details Pre-equalization for low-cost DTV translators Pre-equalization for low-cost DTV translators

2007-12-25

2007-12-25

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Receivers

Interference or noise reduction

C375S279000, C375S295000, C375S229000, C375S301000, C348S608000, C348S722000, C348S723000, C348S724000, C348S470000

Reexamination Certificate

active

10700124

ABSTRACT:
A low cost DTV translator, which translates an incoming signal on channel A to an outgoing signal on channel B, includes a transmitter pre-equalizer whose taps are configured with tap values that pre-distort a signal so as to negate distortion caused by a high power amplifier and emission mask filter at the output of the DTV translator. This pre-distortion is accomplished by using the transmitter of the DTV translator to provided a reference signal and to use the receiver of the DTV translator as a reference receiver for the reference signal to thereby avoid the use of a more expensive external reference receiver.

REFERENCES:
patent: 6281936 (2001-08-01), Twitchell et al.
patent: 6320463 (2001-11-01), Leva et al.
patent: 6335767 (2002-01-01), Twitchell et al.
patent: 6515712 (2003-02-01), Jeong
patent: 6600516 (2003-07-01), Danielsons et al.
patent: 6751266 (2004-06-01), Danielsons
patent: 6917389 (2005-07-01), Lee
patent: 2004/0008764 (2004-01-01), Seo et al.

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