Gaussian (dirty) multiple access channels: a compute-and-forward perspective

Lattice codes are applied to the two-user Gaussian multiple access channel (MAC) combined with a modified compute-and-forward transmitting scheme. It is shown that non-corner points on the boundary of the capacity region can be achieved by decoding two integer sums of the codewords, which can be viewed as a generalization of the well-known successive cancellation decoding. A similar idea is then applied to the so-called dirty MAC where two interfering signals are known non-causally to the two transmitters in a distributed fashion. Our scheme recovers previously known results and gives new achievable rate regions. The proposed scheme can be extended to the case with more than two users.

Published in:
Information Theory (ISIT), 2014 IEEE International Symposium on, 2949-2953
Presented at:
2014 IEEE International Symposium On Information Theory (ISIT)
New York, IEEE

 Record created 2015-04-13, last modified 2018-01-28

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