A digital interface for Gaussian relay networks: lifting codes from the discrete superposition model to Gaussian relay networks

Details A digital interface for Gaussian relay networks: lifting codes from the discrete superposition model to Gaussian relay networks A digital interface for Gaussian relay networks: lifting codes from the discrete superposition model to Gaussian relay networks

2010-01-17

arxiv.org/abs/1001.2900v1

Computer Science

Information Theory

5 pages, 2010 IEEE Information Theory Workshop, Cairo

Scientific paper

For every Gaussian relay network with a single source-destination pair, it is known that there exists a corresponding deterministic network called the discrete superposition network that approximates its capacity uniformly over all SNR's to within a bounded number of bits. The next step in this program of rigorous approximation is to determine whether coding schemes for discrete superposition models can be lifted to Gaussian relay networks with a bounded rate loss independent of SNR. We establish precisely this property and show that the superposition model can thus serve as a strong surrogate for designing codes for Gaussian relay networks. We show that a code for a Gaussian relay network, with a single source-destination pair and multiple relay nodes, can be designed from any code for the corresponding discrete superposition network simply by pruning it. In comparison to the rate of the discrete superposition network's code, the rate of the Gaussian network's code only reduces at most by a constant that is a function only of the number of nodes in the network and independent of channel gains. This result is also applicable for coding schemes for MIMO Gaussian relay networks, with the reduction depending additionally on the number of antennas. Hence, the discrete superposition model can serve as a digital interface for operating Gaussian relay networks.

Affiliated with

Also associated with

No associations

Rating

A digital interface for Gaussian relay networks: lifting codes from the discrete superposition model to Gaussian relay networks 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 A digital interface for Gaussian relay networks: lifting codes from the discrete superposition model to Gaussian relay networks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A digital interface for Gaussian relay networks: lifting codes from the discrete superposition model to Gaussian relay networks will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-455733