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

Publication Type:

Journal Article

Source:

IEEE Transactions on Wireless Communications, Volume 7, Issue 5, p.1862-1867 (2008)

Keywords:

ad hoc network, cooperative communications, dirty paper coding, network coding, precoding

Abstract:

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.

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