1. Adaptive Turbo-Coded Modulation for Flat-Fading Channels.
- Author
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Vishwanath, Sriram and Goldsmith, Andrea
- Subjects
- *
CHARACTER sets (Data processing) , *CODING theory , *MODULATION theory - Abstract
In this paper, we consider a turbo-coded system employed on a flat-fading channel where the transmitter and receiver adapt the encoder, decoder, modulation scheme, and transmit power to the state of the channel. Assuming instantaneous and error-free channel gain and phase knowledge at the transmitter and the receiver, we determine the optimal adaptation strategy that maximizes the throughput of this system, while achieving a given bit-error rate under an average power constraint. Our optimized adaptive modulation strategy is based on an extensive set of existing turbo-coded modulation schemes. We find that adapting both the turbo encoder (rate) and the transmit power can achieve performance within 3 dB of the fading channel capacity. [ABSTRACT FROM AUTHOR]
- Published
- 2003
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