Multi-Ary EXIT Chart Analysis with Chi-Square Distributed A Priori Information for Concatenation of USTM and Signal-Based Turbo Coding

Conventional extrinsic information transfer (EXIT) chart fits for Gaussian distributed a priori information. In this paper, we propose a multi-ary EXIT chart with Chi-square distributed a priori information to analyze the convergence behavior of unitary space-time signal-based turbo code (UST-SB- TC...

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Bibliographic Details
Main Authors: Da-Peng Zhang, Ju Liu, Heng-Yang Zhang
Format: Conference Proceeding
Language:English
Subjects:
Bit error rate
Decoding
Histograms
Iterative decoding
Measurement
Signal to noise ratio
Turbo codes
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Summary:Conventional extrinsic information transfer (EXIT) chart fits for Gaussian distributed a priori information. In this paper, we propose a multi-ary EXIT chart with Chi-square distributed a priori information to analyze the convergence behavior of unitary space-time signal-based turbo code (UST-SB- TC) for multiple-input multiple-output (MIMO) wireless communication systems. We give the model of a priori information via the conditional probability density function (PDF) of the received signals and use the a priori signal-to-noise ratio (SNR) as the connection between the a priori and the extrinsic information. Simulations show that the model of a priori information is appropriate and the EXIT chart can well depict the iterative decoding.
ISSN:1550-2252
DOI:10.1109/VTCSpring.2013.6692640