Compress-and-Forward on a Multiaccess Relay Channel With Computation at the Receiver

Abstract : We study a system in which two sources communicate with a destination with the help of a half-duplex relay. We consider a decoding strategy, based on the compute-and-forward strategy, in which the destination decodes two integer-valued linear combinations that relate the transmitted codewords. In this strategy, the relay compresses its observation using Wyner- Ziv compression and then forwards it to the destination. The destination appropriately combines what it gets from the direct transmission and the relay. Then, using this combination, it computes two integer-valued linear combinations. We discuss the encoding/decoding strategy, and evaluate the achievable sumrate. Next, we consider the problem of allocating the powers and selecting the integer-valued coefficients of the recovered linear combinations in order to maximize the sum-rate. For the model under consideration, the optimization problem is NP hard. We propose an iterative algorithm to solve this problem using coordinate descent method. The results are illustrated through some numerical examples.
Type de document :
Communication dans un congrès
IEEE International Conference on Communications, ICC, Jun 2013, Budapest, Hungary. 2013


https://hal.archives-ouvertes.fr/hal-00832511
Contributeur : Abdellatif Zaidi <>
Soumis le : lundi 10 juin 2013 - 18:41:29
Dernière modification le : lundi 10 juin 2013 - 18:41:29

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  • HAL Id : hal-00832511, version 1

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Mohieddine El Soussi, Abdellatif Zaidi, Luc Vandendorpe. Compress-and-Forward on a Multiaccess Relay Channel With Computation at the Receiver. IEEE International Conference on Communications, ICC, Jun 2013, Budapest, Hungary. 2013. <hal-00832511>

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