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Ted E Hartson, Robert V C Dickinson, Walter S Ciciora: Expanded information capacity for existing communication transmission systems. Dotcast, Kilpatrick Stockton, February 19, 2008: US07333153 (61 worldwide citation)

A system for transmitting digital programming includes a program source providing digital information, circuitry for modulating the digital information onto a visual carrier modulated with analog television programming, and a visual transmitter coupled to the modulating circuitry. Using a phase modu ...


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Wonzoo Chung, Thomas J Endres, Christopher D Long: Joint adaptive optimization of soft decision device and feedback equalizer. Dotcast, Kilpatrick Stockton, February 20, 2007: US07180942 (3 worldwide citation)

The present invention uses a novel adaptive soft decision device in order to jointly optimize decision device and DFE operation. The soft decision device receives the input and output samples of the slicer and generates a feedback sample by non-linearly combining them with respect to a single decisi ...


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Andrew Rowser, Christopher David Long, Glenn Borland: Miniature ultra-wideband active receiving antenna. Dotcast, Perkins Coie, July 12, 2005: US06917336 (3 worldwide citation)

According to some aspects of this invention, a compact, broadband active receiving antenna uses one or more high transconductance transistors such as Field Effect Transistor(s) paired with another Transistor and arranged in a Cascode amplifier configuration. Some embodiments involve a single high tr ...


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Thomas J Endres, Douglas Whitcomb, Christopher David Long, Wonzoo Chung: Decision feedback equalization with fractionally-spaced feedback data. Dotcast, Perkins Coie, March 18, 2008: US07346105 (3 worldwide citation)

A decision feedback equalizer (DFE) architecture uses feedback samples that are over-sampled with respect to the symbol rate. On-baud feedback samples are quantized with a slicer, while off-baud samples are linear, IIR samples. Both forward and feedback filters are fractionally-spaced, but adapted o ...


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Endres Thomas J, Long Christopher D, Fagan Rory, Chung Wonzoo: Joint, adaptive control of equalization, synchronization, and gain in a digital communications receiver. Dotcast, Endres Thomas J, Long Christopher D, Fagan Rory, Chung Wonzoo, PRATT John S, September 2, 2004: WO/2004/075469 (1 worldwide citation)

Various aspects and embodiments of the present invention derive statistics of received signal quality and use these statistics to jointly control operation of timing recovery, carrier recovery, automatic gain control, and equalization functions.


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Hartson Ted E, Dickinson Robert V, Ciciora Walter S: Capacite dinformations etendue pour systemes de transmission de communications existants, Expanded information capacity for existing communication transmission systems. Encamera Sciences Corporation, Dotcast, BERESKIN & PARR, October 28, 1999: CA2328724

A system for transmitting digital programming includes a program source providing digital information, circuitry for modulating the digital information onto a visual carrier modulated with analog television programming, and a visual transmitter coupled to the modulating circuitry. Using a phase modu ...


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Long Christopher D, Endres Thomas J: Adaptive expanded information capacity for television communications systems. Dotcast, Ciciora Walt, Hartson Ted E, June 15, 2005: EP1540951-A1

Methods and systems for simultaneous transmission of a standard analog television video signal and a data signal. A transmitter system comprises an analog video signal path and a data signal path. The data signal path produces a data signal that is added to, combined with, or otherwise imposed on th ...


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Hoarty Leo W, Ciciora Walter S, Hartson Ted E: Cable television system and method for compatible bandwidth upgrade using embedded digital channels. Dotcast, July 6, 2005: EP1550306-A1

Various embodiments of the invention provide apparatus, methods, and systems for effectuating an increase in the effective bandwidth of a cable television distribution plant in a manner compatible with most common cable television systems. By using methods and systems for simultaneously transmitting ...


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Wonzoo Chung, Christopher D Long, Thomas J Endres: Data Insertion Techniques for Expanding Information Capacity of Existing Communication Systems. Dotcast, Perkins Coie, Patent Sea, December 27, 2007: US20070296860-A1

Methods and apparatus are described for inserting data in a communications system, such as in an existing analog communications system, using quadrature amplitude modulation (QAM) with in-phase analog signals and quadrature data signals. These methods can minimize the distortion to the analog signal ...