Resources Contact Us Home
Dual mode QAM/VSB receiver

Image Number 16 for United States Patent #6842495.

A television receiver system capable of receiving and demodulating television signal information content that has been modulated and transmitted in accordance with a variety of modulation formats is disclosed. In particular, the system is able to accommodate receipt and demodulation of at least 8 and 16-VSB modulated signals in order to support US HDTV applications, as well as 64 and 256-QAM modulated signals, for European and potential US CATV implementations. The system includes carrier and timing recovery loops adapted to operate on an enhanced pilot signal as well as decision directed carrier phase recovery loops. Phase detectors operate on I and Q rail signals, or generate a Q rail from a Hilbert transform of the I rail. Decision directed loops incorporate a trellis decoder in order to operate on sequence estimated decisions for improved reliability in poor SNR environments.

  Recently Added Patents
Electric motor
Artificial engine sound control unit, approaching vehicle audible system, and electric vehicle having them
Woven mesh substrate with semiconductor elements, and method and device for manufacturing the same
Radio transmitter and radio receiver with channel condition assessment
Alterable account number
Conductor for transmitting electrical power
Ion beam system and method of operating ion beam system
  Randomly Featured Patents
Process for the separation of amino acids and their salts from an aqueous solution
Device for treating a fruit
Production of non-explosive fine metallic powders
Method and system for synchronizing a base station of a wireless communication system and a subscriber communication equipment
Method of making a semiconductor device with integrated RC network and schottky diode
Robot system
Plant growth regulators derived from chitin
Stackable tray
Vehicle seat
Hair curling iron