TY - GEN
T1 - Fixed-point performance of space-time turbo trellis coded modulation
AU - Nguyen, Kim Chi
AU - Gunawardana, Upul
AU - Liyana-Pathirana, Ranjith
PY - 2006
Y1 - 2006
N2 - To achieve both diversity gain and coding gain, the design of space-time turbo trellis coded modulation (ST Turbo TCM), which is based on the Turbo structure, has been proposed in the literature. The aim of this paper is to study the effect of finite-word length representation on the performance of ST Turbo TCM. We present the investigation of bit-width optimization for an 4-state QPSK ST Turbo TCM decoder based on the symbol-by-symbol (SBS) logarithm-maximum a posteriori (Log-MAP) algorithm on a quasistatic fading channel. The decoder structure utilizes a sliding window algorithm for reducing memory requirements and decoding latency. Simulation results show that ST Turbo TCM is feasible for finite word length representation without significant degradation in the frame error rate (FER) performance. The optimum word length configurations are defined for all quantities external and internal to the SBS Log-MAP decoder.
AB - To achieve both diversity gain and coding gain, the design of space-time turbo trellis coded modulation (ST Turbo TCM), which is based on the Turbo structure, has been proposed in the literature. The aim of this paper is to study the effect of finite-word length representation on the performance of ST Turbo TCM. We present the investigation of bit-width optimization for an 4-state QPSK ST Turbo TCM decoder based on the symbol-by-symbol (SBS) logarithm-maximum a posteriori (Log-MAP) algorithm on a quasistatic fading channel. The decoder structure utilizes a sliding window algorithm for reducing memory requirements and decoding latency. Simulation results show that ST Turbo TCM is feasible for finite word length representation without significant degradation in the frame error rate (FER) performance. The optimum word length configurations are defined for all quantities external and internal to the SBS Log-MAP decoder.
UR - https://www.scopus.com/pages/publications/34547579653
U2 - 10.1109/TENCON.2006.343917
DO - 10.1109/TENCON.2006.343917
M3 - Conference Paper
AN - SCOPUS:34547579653
SN - 1424405491
SN - 9781424405497
T3 - IEEE Region 10 Annual International Conference, Proceedings/TENCON
BT - 2006 IEEE Region 10 Conference, TENCON 2006
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2006 IEEE Region 10 Conference, TENCON 2006
Y2 - 14 November 2006 through 17 November 2006
ER -