Error detection/correction and fault detection/recovery – Pulse or data error handling – Digital data error correction
Reexamination Certificate
2005-12-13
2005-12-13
Chase, Shelly (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Digital data error correction
C714S786000
Reexamination Certificate
active
06976202
ABSTRACT:
A method and apparatus for time and frequency domain forward error correction (FEC) in a modem which communicates data using multiple discrete sub-channels is provided. The invention may be implemented in hardware, software or firmware. In an embodiment of the invention a modem with a plurality of components forming a transmit path and a receive path is disclosed. The modem communicates data across a wired or wireless communication medium using a multiplicity of discrete sub-channels. The modem includes a transform component and a time domain FEC component. The transform component transforms the multiplicity of discrete sub-channels of a communication between a time domain and a frequency domain on the receive path and vice-versa on the transmit path. The time domain FEC component couples to the transform component. The time domain FEC component has a complementary encoder and decoder portion on the transmit and receive paths respectively. The encoder and decoder portions encode and decode respectively the multiplicity of discrete sub-channels in the time domain.
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Telecommunications and mission operations directorate-DSN technology program, Communications Systems and Research Section, JPL; www331.jpl.nasa.gov/public/TurboForce.GIF; Publication date unknown but no later than Mar. 7, 2002.
Ginis George
Rezvani Behrooz
Abraham Esaw
Cary Charles C
Chase Shelly
Ikanos Communication Inc.
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