Multiplex communications – Communication over free space – Combining or distributing information via time channels
Reexamination Certificate
2006-05-23
2006-05-23
Pham, Chi (Department: 2667)
Multiplex communications
Communication over free space
Combining or distributing information via time channels
C370S441000, C370S442000
Reexamination Certificate
active
07050419
ABSTRACT:
A pipelined digital data receiver for a cable TV headend which is capable of receiving DOCSIS 1.0 or 1.1 or advanced PHY TDMA or SCDMA bursts having programmable symbol rates and programmable modulation types as well as a host of other burst parameters such at Trellis code modulation on or off, scrambling on or off, various values for Reed-Solomon T number and codeword length. The receiver has an RF section to filter and digitize incoming RF signals. It also has an input section to detect impulse noise and do match filtering and despread SCDMA bursts. A timing recovery section recovers the symbol clock and detects the start of bursts and collisions. A rotational amplifier and equalizer calculate and track gain, phase and frequency offsets and correct symbols and calculates equalization coefficients. A decoder section decodes TCM and non TCM bursts, and a Reed-Solomon decoder section reconstructs RS codewords and uses them to error correct the payload data.
REFERENCES:
patent: 6243369 (2001-06-01), Grimwood et al.
patent: 6356555 (2002-03-01), Rakib et al.
patent: 6459703 (2002-10-01), Grimwood et al.
patent: 6791995 (2004-09-01), Azenkot et al.
patent: 2001/0055319 (2001-12-01), Quigley et al.
Azenkot Yehuda
Grimwood Michael
Lind Paul Alan
Ly Anh-Vu
Pham Chi
Terayon Communicaion Systems, Inc.
Thelen Reid & Priest LLP
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