Title :
Hybrid-ARQ scheme using different TCM for retransmission
Author :
Yu, Jean X. ; Li, Yuan ; Murata, Hidekazu ; Yoshida, Susumu
Author_Institution :
Commun. Res. Lab., McMaster Univ., Hamilton, Ont., Canada
fDate :
10/1/2000 12:00:00 AM
Abstract :
A new hybrid automatic repeat-request (ARQ) scheme that uses supplementary trellis codes for retransmission is described. In this scheme, supplementary codes are designed to compensate for the squared free distance (dfree2) of the trellis code used for the previous transmission. Differently encoded codewords are combined and decoded by the same Viterbi decoder at the receiver. This scheme provides improved (dfree2) upon retransmission compared with that provided by the conventional trellis coded hybrid-ARQ scheme where the same coding scheme is used for all transmissions.
Keywords :
Viterbi decoding; automatic repeat request; trellis coded modulation; TCM; Viterbi decoder; encoded codewords; hybrid automatic repeat-request; hybrid-ARQ; receiver; retransmission; squared free distance compensation; supplementary trellis codes; trellis coded hybrid-ARQ; Automatic control; Automatic repeat request; Bit error rate; Communication systems; Convolutional codes; Decoding; Informatics; Mobile communication; Power system reliability; Viterbi algorithm;
Journal_Title :
Communications, IEEE Transactions on
