When Network Coding and Dirty Paper Coding Meet in a Cooperative Ad Hoc Network

Nadia Fawaz (1) , David Gesbert (1) , Merouane Debbah (2)

1 EURECOM
2 SUPELEC-Campus Gif

We develop and analyze new cooperative strategies for ad hoc networks that are more spectrally efficient than classical Decode & Forward (DF) protocols. Using analog network coding, our strategies preserve the practical half-duplex assumption but relax the orthogonality constraint. The introduction of interference due to non-orthogonality is mitigated thanks to precoding, in particular Dirty Paper coding. Combined with smart power allocation, our cooperation strategies allow to save time and lead to a more efficient use of the bandwidth and to improved network throughput with respect to classical Repetition-DF and Parallel-DF.

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

Nadia Fawaz, David Gesbert, Merouane Debbah. When Network Coding and Dirty Paper Coding Meet in a Cooperative Ad Hoc Network. IEEE Transactions on Wireless Communications, 2008, 7 (5), pp.1862-1867. ⟨hal-00353194⟩