Title :
Parallel concatenated trellis coded modulation with automatic repeat request for ADSL applications
Author_Institution :
Alcatel Corp. Res. Center, Antwerp, Belgium
Abstract :
The paper presents a parallel concatenated trellis coded modulation (PCTCM) scheme for ADSL applications. Automatic repeat request (ARQ) is used to remove the inherent error floor of PCTCM. This makes the system robust against impulse noise even if the delay is significantly lowered with respect to the current ADSL FEC scheme. A reduced-search algorithm is exploited to lower the computational complexity. This hybrid PCTCM-ARQ unites high coding gain with low delay, robustness against impulse noise and a complexity comparable to that of ADSL
Keywords :
automatic repeat request; computational complexity; concatenated codes; delays; digital subscriber lines; error statistics; impulse noise; search problems; trellis coded modulation; ADSL; PCTCM; automatic repeat request; coding gain; complexity; computational complexity; error floor; hybrid PCTCM-ARQ; impulse noise; low delay robustness; parallel concatenated trellis coded modulation; reduced-search algorithm; Automatic repeat request; Bandwidth; Concatenated codes; Convolutional codes; Delay; Forward error correction; Modulation coding; Noise robustness; Throughput; Turbo codes;
Conference_Titel :
Communications, 2000. ICC 2000. 2000 IEEE International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-6283-7
DOI :
10.1109/ICC.2000.853663
