TY - GEN
T1 - A novel trellis coded modulation system without signal point expansion
AU - Ariyoshi, Masayuki
AU - Yamazato, Takaya
AU - Sasase, Iwao
AU - Mori, Shinsaku
N1 - Funding Information:
This work is partly supported by NTT Co., Co. and NTT Mobile Communication Network Inc..
Publisher Copyright:
© 1993 IEEE.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 1993
Y1 - 1993
N2 - In conventional trellis coded modulation (TCM), the number of signal points in the constellation is doubled by additional redundant bits. This paper proposes a novel TCM system without signal point expansion which employs 2m kinds of trellis paths depending upon m encoder input bits, instead of 2/sup m+1/ kinds of paths of conventional TCM. The number of cosets assigned to trellis paths and total number of signal points can be reduced to half of those in conventional TCM. Therefore, it is possible to implement a coded modulation systems without signal point expansion by additional redundant bits, and the effective bit rate becomes unity. This scheme achieves a considerable coding gain in comparison to the traditional uncoded systems, and to the conventional TCM system. Furthermore, as the proposed scheme needs only half the signal points of conventional TCM, the average power is lower and it is less sensitive to the carrier phase offset.
AB - In conventional trellis coded modulation (TCM), the number of signal points in the constellation is doubled by additional redundant bits. This paper proposes a novel TCM system without signal point expansion which employs 2m kinds of trellis paths depending upon m encoder input bits, instead of 2/sup m+1/ kinds of paths of conventional TCM. The number of cosets assigned to trellis paths and total number of signal points can be reduced to half of those in conventional TCM. Therefore, it is possible to implement a coded modulation systems without signal point expansion by additional redundant bits, and the effective bit rate becomes unity. This scheme achieves a considerable coding gain in comparison to the traditional uncoded systems, and to the conventional TCM system. Furthermore, as the proposed scheme needs only half the signal points of conventional TCM, the average power is lower and it is less sensitive to the carrier phase offset.
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U2 - 10.1109/ICUPC.1993.528462
DO - 10.1109/ICUPC.1993.528462
M3 - Conference contribution
AN - SCOPUS:85063369734
T3 - Proceedings of 2nd IEEE International Conference on Universal Personal Communications: Gateway to the 21st Century, ICUPC 1993
SP - 653
EP - 657
BT - Proceedings of 2nd IEEE International Conference on Universal Personal Communications
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2nd IEEE International Conference on Universal Personal Communications: Gateway to the 21st Century, ICUPC 1993
Y2 - 12 October 1993 through 15 October 1993
ER -