Joint Network/Channel Decoding for Heterogeneous Multi-Source/Multi-Relay Cooperative Networks

Poulliat Charly (1) , Marco Di Renzo (2)

1 UCP - Université de Cergy Pontoise
2 L2S - Laboratoire des signaux et systèmes

In this paper, we study joint network/channel decoding for multi{source multi{relay heterogeneous wireless networks. When convolutional and network codes are used at the phys- ical and network layers, respectively, we show that error correction and diversity properties of the whole network can be characterized by an equivalent and distributed convo- lutional network/channel code. In particular, it is shown that, by properly choosing the network code, the equivalent code can show Unequal Error Protection (UEP) properties, which might be useful for heterogeneous wireless networks in which each source might ask for a di®erent quality{of{ service requirement or error probability. Using this repre- sentation, we show that Maximum{Likelihood (ML) joint network/channel decoding can be performed by using the trellis representation of the distributed convolutional net- work/channel code. Furthermore, to deal with decoding er- rors at the relays, a ML{optimum receiver which exploits side information on the source{to{relay links is proposed.

Domaines: Théorie de l'information [cs.IT]; Théorie de l'information et codage [math.IT]

Poulliat Charly, Marco Di Renzo. Joint Network/Channel Decoding for Heterogeneous Multi-Source/Multi-Relay Cooperative Networks. IEEE VALUETOOLS 2011, May 2011, Cachan, France. pp.1-6. ⟨hal-00663054⟩