Title :
Turbo coding for transmission over ADSL
Author :
Zhang, Liang ; Yongacoglu, Abbas
Author_Institution :
Sch. of Inf. Technol. & Eng., Ottawa Univ., Ont., Canada
Abstract :
A multidimensional 16-state trellis coded modulation (MTCM) is given as an option in the asymmetric digital subscriber line (ADSL) standard based on discrete multitone (DMT) techniques. To further improve the transmission performance, instead of this MTCM, we propose to use bandwidth-efficient turbo trellis coded modulation (TTCM) in ADSL DMT systems. We show that by using turbo codes, we can obtain 6 dB coding gain for a bit error rate (BER) of 10-6 in AWGN channels and more than 6.8 dB coding gain for a BER of 10-7 using a concatenated coding scheme
Keywords :
AWGN channels; channel coding; concatenated codes; digital subscriber lines; error statistics; trellis coded modulation; turbo codes; ADSL standard; AWGN channels; BER; DMT techniques; asymmetric digital subscriber line; bit error rate; concatenated coding; discrete multitone techniques; transmission performance; turbo coding; turbo trellis coded modulation; AWGN channels; Bit error rate; Code standards; DSL; Digital modulation; Gain; Modulation coding; Multidimensional systems; OFDM modulation; Turbo codes;
Conference_Titel :
Communication Technology Proceedings, 2000. WCC - ICCT 2000. International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-6394-9
DOI :
10.1109/ICCT.2000.889181
