Divide-and-conquer: Approaching the capacity of the two-pair bidirectional Gaussian relay network

Details Divide-and-conquer: Approaching the capacity of the two-pair bidirectional Gaussian relay network Divide-and-conquer: Approaching the capacity of the two-pair bidirectional Gaussian relay network

2010-01-24

arxiv.org/abs/1001.4271v3

Computer Science

Information Theory

IEEE Trans. on Information Theory, accepted

Scientific paper

The capacity region of multi-pair bidirectional relay networks, in which a relay node facilitates the communication between multiple pairs of users, is studied. This problem is first examined in the context of the linear shift deterministic channel model. The capacity region of this network when the relay is operating at either full-duplex mode or half-duplex mode for arbitrary number of pairs is characterized. It is shown that the cut-set upper-bound is tight and the capacity region is achieved by a so called divide-and-conquer relaying strategy. The insights gained from the deterministic network are then used for the Gaussian bidirectional relay network. The strategy in the deterministic channel translates to a specific superposition of lattice codes and random Gaussian codes at the source nodes and successive interference cancelation at the receiving nodes for the Gaussian network. The achievable rate of this scheme with two pairs is analyzed and it is shown that for all channel gains it achieves to within 3 bits/sec/Hz per user of the cut-set upper-bound. Hence, the capacity region of the two-pair bidirectional Gaussian relay network to within 3 bits/sec/Hz per user is characterized.

Affiliated with

Also associated with

No associations

Rating

Divide-and-conquer: Approaching the capacity of the two-pair bidirectional Gaussian relay network does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Divide-and-conquer: Approaching the capacity of the two-pair bidirectional Gaussian relay network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Divide-and-conquer: Approaching the capacity of the two-pair bidirectional Gaussian relay network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-696849