Network simplification: the Gaussian diamond network with Multiple Antennas

We consider the N-relay Gaussian diamond network when the source and the destination have ns ≥ 2 and nd ≥ 2 antennas respectively. We show that when ns = nd = 2 and when the individual MISO channels from the source to each relay and the SIMO channels from each relay to the destination have the same capacity, there exists a two relay sub-network that achieves approximately all the capacity of the network. To prove this result, we establish a simple relation between the joint entropies of three Gaussian random variables, which is not implied by standard Shannon-type entropy inequalities.1


Presented at:
IEEE International Symposium on Information Theory (ISIT'11), St Petersburg, Russia, July 31-August 5, 2011
Year:
2011
Laboratories:




 Record created 2012-01-25, last modified 2018-03-17

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