The last few years have witnessed a significant decrease in the gap between the Shannon channel capacity limit and what is practically achievable. Progress has resulted from novel extensions of previously known coding techniques involving interleaved concatenated codes. A considerable body of simulation results is now available, supported by an important but limited theoretical basis. This pape...

In this paper we define the deterministic capacity of a network. The deterministic capacity is defined by restricting nodes to transmitting (asymptotically) deterministic functions of the messages in the network. It can be seen as an upper bound on the set of rates achieved by all possible decodeforward coding schemes, in an abstract sense. A key advantage of the deterministic capacity is that ...

One of the most surprising recent results in quantum Shannon theory is the superactivation of the quantum capacity of a quantum channel. This phenomenon has its roots in the extreme violation of additivity of the channel capacity and enables to reliably transmit quantum information over zerocapacity quantum channels. In this work we demonstrate a similar effect for the classical capacity of a q...

An axiomatization of the concept of entropy of a discrete Choquet capacity is given. It is based on three axioms: the symmetry property, a boundary condition for which the entropy reduces to the classical Shannon entropy, and a generalized version of the well-known recursivity property. This entropy, recently introduced to extend the Shannon entropy to nonadditive measures, fulfills several pro...

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Ashik Mathew Kizhakkepallathu Name of the doctoral dissertation Combinatorial Algorithms for Packings, Coverings and Tilings of Hypercubes Publisher School of Electrical Engineering Unit Department of Communications and Networking Series Aalto University publication series DOCTORAL DISSERTATIONS 112/2015 Field of research Info...

This report describes my method of increasing the capacity of any wireless network through the application of MIMO technology. The Shannon capacity of wireless networks has been calculated in different instances by MATLAB. Using Simulink, the various parameters of a wireless Rayleigh Multipath fading channel are calculated. This is done in order to experimentally prove the advantages of a MIMO ...

In this paper, according to Dougherty et al.’s method, we construct a matroidal network associated with vector matroid 8 R . Then we use Ingleton inequality and Zhang-Yeung non-Shannon-type information inequality respectively to compute upper bounds on coding capacity of the constructed matroidal network. Finally, We prove that the coding capacity of the matroidal network associated with 8 R is...

The average channel capacity (in the Shannon sense) per user of a hybrid cellular directsequence/fast frequency hopping code-division multipleaccess (DS/FFH-CDMA) system operating in a Rayleigh fading environment is examined. The analysis covers the downlink of a cellular system assuming a static model of operation and leads to a novel expression for the average channel capacity available to ea...

In this paper, the vector parabolic equation method (VPEM) is used to investigate the Shannon capacity of multiple-input multiple-output (MIMO) communication systems in indoor corridors. This deterministic three-dimensional (3-D) full-wave method is capable to demonstrate the effects of antennas and propagation environment on the channel capacity. The VPEM can model any field depolarization eff...