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MMSE decoding for analog joint source channel coding using Monte Carlo importance sampling
Hu, Yichuan; García Frías, Javier; Lamarca Orozco, M. Meritxell
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. SPCOM - Grup de Recerca de Processament del Senyal i Comunicacions
We investigate the performance of a discrete-time all-analog-processing joint source-channel coding system for the transmission of i.i.d. Gaussian sources over additive white Gaussian noise (AWGN) channels. At the encoder, samples of an i.i.d. source are grouped and mapped into a channel symbol using a space-filling curve. Different from previous work in the literature, MMSE instead of ML decoding is considered, and we focus on both high and low channel SNR regions. In order to reduce complexity, Monte Carlo importance sampling is applied in the decoding process. The main contribution of this paper is to show that for a wide range of rates the proposed system presents a performance very close to the theoretical limits, even at low SNR, as long as the curve parameters are properly optimized.
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació
Models and modeling in science education
Signal theory (Telecommunication)
Random noise theory
Senyal, Teoria del (Telecomunicació)
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