Method and system for turbo encoding in ADSL

Details Method and system for turbo encoding in ADSL Method and system for turbo encoding in ADSL

2007-02-06

2007-02-06

Tran, Khanh (Department: 2611)

Pulse or digital communications

Transmitters

Quadrature amplitude modulation

C375S222000, C375S265000

Reexamination Certificate

active

09912068

ABSTRACT:
In a coding system for asymmetric digital subscriber line (ADSL) communications, a method of encoding a sequence of information bits is provided comprising the steps of dividing the information bits into encoding bits and parallel bits; encoding the encoding bits to produce encoded bits; mapping the encoded bits and the parallel bits into first and second pulse amplitude modulation (PAM) signals; and generating a quadrature amplitude modulation (QAM) signal from these first and second PAM signals. This method overcomes the decoder complexity that would otherwise be required due to the large QAM constellations involved for ADSL communications.

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