Multiple Source Cooperation: From Code Division Multiplexing To Variable-Rate Network Coding

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Description/Abstract

Multiple Source Cooperation (MSC) techniques,including conventional Code Division Multiplexing (CDM) and Classic Network Coding (CNC) are investigated. We adopt a soft sum-product decoding algorithm for the CNC technique for efficiently processing a large number of information streams and propose a flexible Variable-rate Network Coding (VNC) technique, which is capable of attaining a near-optimum performance. Quantitatively, the proposed VNC method is capable of operating within 1dB from the outage capacity of the quasi-static Rayleigh fading channel. The iterative decoding convergence of the multiple source computation methods is analysed with the aid of EXtrinsic Information Transfer (EXIT) charts.