Quadrature amplitude modulation trellis coded modulation...

Details Quadrature amplitude modulation trellis coded modulation... Quadrature amplitude modulation trellis coded modulation...

2006-06-06

2010-06-15

Payne, David C (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S262000, C375S265000, C375S341000, C704S242000, C714S792000, C714S795000

Reexamination Certificate

active

07738580

ABSTRACT:
A quadrature amplitude modulation trellis coded modulation (QAM-TCM) decoding apparatus and the related method that receives and decodes a QAM signal. The QAM-TCM decoding apparatus includes an in-phase least significant bit (LSB) decoding path, which includes a in-phase Viterbi decoder for executing a decoding procedure on at least one LSB corresponding to an in-phase component of the QAM signal, a quadrature-phase LSB decoding path, which includes a quadrature-phase Viterbi decoder for executing a decoding procedure on at least one LSB corresponding to a quadrature-phase component of the QAM signal, and a most significant bit (MSB) decoding path for executing a decoding procedure on MSB portions corresponding to the in-phase or the quadrature-phase of the QAM signal.

REFERENCES:
patent: 5416801 (1995-05-01), Chouly et al.
patent: 5740203 (1998-04-01), Ramaswamy et al.
patent: 6233712 (2001-05-01), Rhee et al.
“Series J: Transmission of Television, Sound Programme and other Multimedia Signals, Digital transmission of television signals, Digital multi-programme systems for television, sound and data services for cable distribution”. Telecommunication Standardization Sector of ITU. Apr. 1997. pp. 183-i-iii, 1-60. ITU-T Recommendation .183. International Telecommunication Union.

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