A Unified Framework for Linear-Programming Based Communication Receivers

It is shown that a large class of communication systems which admit a Sum-Product Algorithm (SPA) based receiver also admit a corresponding Linear-Programming (LP) based receiver. The two receivers have a relationship defined by the local structure of the underlying graphical model, and are inhibited by the same phenomenon, which the authors call pseudo-configurations. This concept is a generalization of the concept of pseudo-codewords for linear codes. It is proved that the LP receiver has the 'maximum likelihood certificate' property, and that the receiver output is the lowest cost pseudo-configuration. Equivalence of graph-cover pseudo-configurations and linear-programming pseudo-configurations is also proved.

Provided by: Institute of Electrical & Electronic Engineers Topic: Mobility Date Added: Aug 2011 Format: PDF

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