NDLI: Analog network coding in general SNR regime: Performance of a greedy scheme

Content Provider	IEEE Xplore Digital Library
Author	Agnihotri, S. Jaggi, S. Minghua Chen
Copyright Year	2012
Description	Author affiliation: Department of Information Engineering, The Chinese University of Hong Kong, Hong Kong (Agnihotri, S.; Jaggi, S.; Minghua Chen)
Abstract	The problem of maximum rate achievable with analog network coding for a unicast communication over a layered relay network with directed links is considered. A relay node performing analog network coding scales and forwards the signals received at its input. Recently this problem has been considered under certain assumptions on per node scaling factor and received SNR. Previously, we established a result that allows us to characterize the optimal performance of analog network coding in network scenarios beyond those that can be analyzed using the approaches based on such assumptions. The key contribution of this work is a scheme to greedily compute a lower bound to the optimal rate achievable with analog network coding in general layered networks. This scheme allows for exact computation of the optimal achievable rates in a wider class of layered networks than those that can be addressed using existing approaches. For the specific case of the Gaussian N-relay diamond network, to the best of our knowledge, the proposed scheme provides the first exact characterization of the optimal rate achievable with analog network coding. For general layered networks, our scheme allows us to compute optimal rates within a “small” gap from the cut-set upper bound asymptotically in the source power.
Starting Page	137
Ending Page	142
File Size	226507
Page Count	6
File Format	PDF
ISBN	9781467318907
e-ISBN	9781467318921
DOI	10.1109/NETCOD.2012.6261898
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Upper bound Optimized production technology Network coding Vectors Diamond-like carbon Relays Signal to noise ratio
Content Type	Text
Resource Type	Article

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