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This paper proposes a principled extension of the traditional single-layer flat sparse coding scheme, where a two-layer coding scheme is derived based on theoretical analysis of nonlinear functional approximation that extends recent results for local coordinate coding. The two-layer approach can be easily generalized to deeper structures in a hierarchical multiple-layer manner. Empirically, it ...

Communication networks are a prevalent component of the modern connected times. Everywhere around us people and machines exchange information at various scales and throughputs. The network is everywhere: from the analog voice communication that the phone company offers to the vast expanse of connectedness built upon TCP/IP passing by all the mobile communication devices that literally make a ne...

Network coding is an elegant and novel technique introduced at the turn of the millennium to improve network throughput and performance. It is expected to be a critical technology for networks of the future. This tutorial addresses the first most natural questions one would ask about this new technique: how network coding works and what are its benefits, how network codes are designed and how m...

Title of dissertation: COOPERATIVE COMMUNICATION WITH WIRELESS NETWORK CODING Wei Guan, Doctor of Philosophy, 2013 Dissertation directed by: Professor K. J. Ray Liu Department of Electrical and Computer Engineering Cooperative communication is a new communication paradigm that allows multiple transceivers to collaborate as a cluster for data transmission, and such clustering could greatly impro...

Network coding is an elegant and novel technique introduced at the turn of the millennium to improve network throughput and performance. It is expected to be a critical technology for networks of the future. This tutorial deals with wireless and content distribution networks, considered to be the most likely applications of network coding, and it also reviews emerging applications of network co...

We study the problem of error-free multiple unicast over directed acyclic networks in a quantum setting. We provide a new information-theoretic proof of the known result that network coding does not achieve a larger quantum information flow than what can be achieved by routing for two-pair communication on the butterfly network. We then consider a k-pair multiple unicast problem and for all k ≥...

A main distinguishing feature of a wireless network compared with a wired network is its broadcast nature, in which the signal transmitted by a node may reach several other nodes, and a node may receive signals from several other nodes simultaneously. Rather than a blessing, this feature is treated more as an interference-inducing nuisance in most wireless networks today (e.g., IEEE 802.11). Th...

In this paper, we propose so-called multicomponent codes with the prescribed subspace metric distance. This class is a generalization of the Silva-Kötter-Kschischang construction (SKK codes). Component constructions are chosen in such a manner that subspace distance between components would be not less than subspace distance of each component. Iterative decoding algorithm is proposed. A few exa...