Optimal coding-decoding for systems controlled via a communication channel |
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Authors: | Feng Yi-wei Ge Guo |
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Affiliation: | 1. College of Electrical and Information Engineering , Lanzhou University of Technology , Lanzhou 730050 , China ywfeng@yeah.net;3. School of Information Science and Technology , Dalian Maritime University , Dalian 116026 , China |
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Abstract: | In this article, we study the problem of controlling plants over a signal-to-noise ratio (SNR) constrained communication channel. Different from previous research, this article emphasises the importance of the actual channel model and coder/decoder in the study of network performance. Our major objectives include coder/decoder design for an additive white Gaussian noise (AWGN) channel with both standard network configuration and Youla parameter network architecture. We find that the optimal coder and decoder can be realised for different network configuration. The results are useful in determining the minimum channel capacity needed in order to stabilise plants over communication channels. The coder/decoder obtained can be used to analyse the effect of uncertainty on the channel capacity. An illustrative example is provided to show the effectiveness of the results. |
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Keywords: | networked control systems noisy channel signal-to-noise ratio coder/decoder |
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