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Zero-Delay Joint Source-Channel Coding for a Bivariate Gaussian on a Gaussian MAC

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6 Author(s)
Floor, P.A. ; Intervention Center, Univ. of Oslo, Oslo, Norway ; Kim, A.N. ; Wernersson, N. ; Ramstad, T.A.
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In this paper, delay-free, low complexity, joint source-channel coding (JSCC) for transmission of two correlated Gaussian memoryless sources over a Gaussian Multiple Access Channel (GMAC) is considered. The main contributions of the paper are two distributed JSCC schemes: one discrete scheme based on nested scalar quantization, and one hybrid discrete-analog scheme based on a scalar quantizer and a linear continuous mapping. The proposed schemes show promising performance which improves with increasing correlation and are robust against variations in noise level. Both schemes also exhibit a constant gap to the performance upper bound when the channel signal-to-noise ratio gets large.

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Communications, IEEE Transactions on  (Volume:60 ,  Issue: 10 )