Joint Turbo coding and source-controlled modulation of cycle-stationary sources in the bandwidth-limited regime
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2010
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In this paper we propose a novel one-layer coding/shaping transmission system for the bandwidth-limited regime based on singlelevel codes and sigma-mapping [1]. Specifically, we focus on cyclestationary information sources with independent symbols. High spectral efficiencies can be achieved by combine at the transmitter a Turbo code with a sigma-mapper. Furthermore, the encoded symbols are modulated by using an asymmetric energy allocation technique before entering the aforementioned sigma-mapper. The corresponding decoder iterates between the Turbo decoder and the sigma-demapper, which exchange progressively refined extrinsic probabilities of the encoded symbols. For the Additive White Gaussian Noise (AWGN) channel, simulation results obtained for very simple Turbo codes show that the proposed system attains low bit error rates at signal-to-noise ratios relatively close to the corresponding Shannon limit. These promising results pave the way for future investigations towards reducing the aforementioned energy gap, e.g. by utilizing more powerful Turbo codes.
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Ochoa , I , Crespo , P M , Del Ser , J & Hernaez , M 2010 , Joint Turbo coding and source-controlled modulation of cycle-stationary sources in the bandwidth-limited regime . in Mobile Lightweight Wireless Systems - Second International ICST Conference, MOBILIGHT 2010, Revised Selected Papers . Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering , vol. 45 LNICST , pp. 618-625 , 2nd International ICST Conference on Mobile Lightweight Wireless Systems, MOBILIGHT 2010 , Barcelona , Spain , 10/05/10 . https://doi.org/10.1007/978-3-642-16644-0_53
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