Adaptive trellis-coded modulation over predicted flat fading channels
- 1 January 2003
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 3 (10903038) , 1532-1536 Vol.3
- https://doi.org/10.1109/vetecf.2003.1285281
Abstract
We consider the optimum design of an adaptive scheme based on TCM and predicted CSI for flat Rayleigh fading channels, intended for fast link adaptation. The question of how to optimally adjust the data rate to maximize the spectral efficiency, subject to a BER constraint when imperfect CSI is taken into account, is answered. An optimum solution based on the predicted SNR and the prediction error variance is derived. The performance of the adaptive TCM scheme is illustrated by utilizing seven 4-D trellis codes based on the International Telecommunications Union's ITU-T V.34 modem standard. The results indicate that the gain in spectral efficiency by adaptive TCM is about 1-2 dB compared to adaptive uncoded M-QAM, for most of average SNRs. Finally, the performance of the adaptive TCM and in particular, its loss at high SNRs compared to adaptive uncoded M-QAM, are investigated in details.Keywords
This publication has 10 references indexed in Scilit:
- Adaptive modulation systems for predicted wireless channelsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2004
- Unbiased power prediction of Rayleigh fading channelsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Degrees of freedom in adaptive modulation: a unified viewIEEE Transactions on Communications, 2001
- Variable-rate adaptive trellis coded QAM for flat-fading channelsIEEE Transactions on Communications, 2001
- Adaptive multidimensional coded modulation over flat fading channelsIEEE Journal on Selected Areas in Communications, 2000
- Adaptive Modulation over Nakagami Fading ChannelsWireless Personal Communications, 2000
- Adaptive coding for time-varying channels using outdated fading estimatesIEEE Transactions on Communications, 1999
- Adaptive coded modulation for fading channelsIEEE Transactions on Communications, 1998
- Variable-rate variable-power MQAM for fading channelsIEEE Transactions on Communications, 1997
- Adaptive trellis-coded multiple-phase-shift keying for Rayleigh fading channelsIEEE Transactions on Communications, 1994