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Cooperative Compute-and-Forward
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DOI：10.1109/TWC.2015.2465904.png)
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We propose a class of signaling schemes that leverage transmitter cooperation in wireless networks employing compute-and-forward or physical-layer network coding. We devise a lattice-coding approach to superposition block Markov encoding from which we construct a cooperative lattice coding strategy. Transmitters broadcast lattice codewords, decode each other's messages, and then cooperatively transmit resolution information which aids relays in decoding finite-field linear combinations of the incoming messages. We show that cooperation provides a substantial improvement in achievable computation rate and outage probability over noncooperative strategies. Using this strategy, we derive a new achievability scheme for the multiway relay channel, the rates of which are near capacity in many regimes and enjoy a diversity advantage over noncooperation.
Keyword:
Cooperative communications
compute-and-forward
diversity gain
lattice codes
physical-layer network coding
期刊
IF:
10.7
论文数:
1.3W
被引数:
5.3W
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