Discrete multi-tone (DMT) system and method that...

Details Discrete multi-tone (DMT) system and method that... Discrete multi-tone (DMT) system and method that...

2007-08-07

2007-08-07

Lamarre, Guy (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C714S776000

Reexamination Certificate

active

11093520

ABSTRACT:
The apparatus and method herein splits the function of a digital subscriber line (DSL) modem data pump between a digital signal processor (DSP106) and a general purpose host central processing unit (CPU102). The DSP (106) handles all front end data pump processing such as interface to an analog front end (108and110), FFT processing, FEQ processing, QAM decoding, and bit formatting. The host CPU (102) handles all back end data pump processing such as DMT tone deordering, data deinterleaving, error detection and correcting, bit descrambling, CRC processing, and the like. In order to enable the DSP (106) and the CPU (102) to communicate with each other effectively, buffers (132) under the control of specialized buffer management methodology (FIG.4) are used.

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