An Achievable Rate for the Multiple-Level Relay Channel
L.-L. Xie, P. R. Kumar · IEEE Transactions on Information Theory · 2005
For the multiple-level relay channel, an achievable rate formula, and a simple coding scheme to achieve it, are presented. Generally, higher rates can be achieved with this coding scheme in the multiple-level relay case than previously known. For a class of degraded channels, this achievable rate is shown to be the exact capacity. An application of the coding scheme to the allcast problem is also discussed.