Design of adaptive modulation and coding system using ideal performance codes

Authors:
Chia-Hao Yu;Kalle Ruttik;Olav Tirkkonen
Affiliations:
Helsinki University of Technology (TKK), FIN, TKK, Finland;Helsinki University of Technology (TKK), FIN, TKK, Finland;Helsinki University of Technology (TKK), FIN, TKK, Finland
Venue:
Proceedings of the 2009 International Conference on Wireless Communications and Mobile Computing: Connecting the World Wirelessly
Year:
2009

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Elements of information theory

Elements of information theory
Adaptive Wireless Transceivers: Turbo-Coded, Turbo-Equalised and Space-Time Coded TDMA, CDMA, MC-CDMA and Ofdm Systems

Adaptive Wireless Transceivers: Turbo-Coded, Turbo-Equalised and Space-Time Coded TDMA, CDMA, MC-CDMA and Ofdm Systems

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Abstract

A major issue in feedback systems is to use the feedback bits most efficiently. In this paper, we use information theory to get an upper limit on the value of feedback bits in an optimum AMC system. The AMC optimization problem is simplified by using ideal error performance (i. e. a step function like performance curve) characteristic of capacity-reaching codes. Given a strong enough code such as turbo code similar step function based approximation can be used. The results show nice match between the solution sets from the ideal error performance approximation and the real error performance.