9 research outputs found
Cellular Offloading via Downlink Cache Placement
In this paper, the downlink file transmission within a finite lifetime is
optimized with the assistance of wireless cache nodes. Specifically, the number
of requests within the lifetime of one file is modeled as a Poisson point
process. The base station multicasts files to downlink users and the selected
the cache nodes, so that the cache nodes can help to forward the files in the
next file request. Thus we formulate the downlink transmission as a Markov
decision process with random number of stages, where transmission power and
time on each transmission are the control policy. Due to random number of file
transmissions, we first proposed a revised Bellman's equation, where the
optimal control policy can be derived. In order to address the prohibitively
huge state space, we also introduce a low-complexity sub-optimal solution based
on an linear approximation of the value function. The approximated value
function can be calculated analytically, so that conventional numerical value
iteration can be eliminated. Moreover, the gap between the approximated value
function and the real value function is bounded analytically. It is shown by
simulation that, with the approximated MDP approach, the proposed algorithm can
significantly reduce the resource consumption at the base station.Comment: Submitted for IEEE ICC 201
On Relations Between the Relative entropy and -Divergence, Generalizations and Applications
The relative entropy and chi-squared divergence are fundamental divergence
measures in information theory and statistics. This paper is focused on a study
of integral relations between the two divergences, the implications of these
relations, their information-theoretic applications, and some generalizations
pertaining to the rich class of -divergences. Applications that are studied
in this paper refer to lossless compression, the method of types and large
deviations, strong~data-processing inequalities, bounds on contraction
coefficients and maximal correlation, and the convergence rate to stationarity
of a type of discrete-time Markov chains.Comment: Published in the Entropy journal, May 18, 2020. Journal version (open
access) is available at https://www.mdpi.com/1099-4300/22/5/56
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Resource allocation for double IRSs assisted wireless powered NOMA networks
We consider an intelligent reflecting surface (IRS)-aided wireless-powered non-orthogonal multiple access (NOMA) network, in which double IRSs are adopted to boost the communication between the transmitter and receiver. We split the overall process into two phases: i) downlink wireless energy transmission (WET) in the first phase and ii) uplink wireless information transmission (WIT) in the second phase. Compared with the existing works, the double IRSs scheme is considered due to obstacles or deep shadowing between the transmitter and receiver. Specifically, we propose a scheme to maximize the sum rate by jointly optimizing the time allocation and phase shift matrices in these two phases. The optimization problem is non-trivial because of the coupling of multiple variables and the constraint of phase shift. An alternative optimization algorithm is adopted to surmount the objective step by step. The WET phase shift matrices are first obtained under given WIT phase shift matrices, and then vice versa. Numerical analysis proves the validity of the proposed scheme in increasing the sum rate and the effectiveness of double IRSs
Divergence Measures
Data science, information theory, probability theory, statistical learning and other related disciplines greatly benefit from non-negative measures of dissimilarity between pairs of probability measures. These are known as divergence measures, and exploring their mathematical foundations and diverse applications is of significant interest. The present Special Issue, entitled “Divergence Measures: Mathematical Foundations and Applications in Information-Theoretic and Statistical Problems”, includes eight original contributions, and it is focused on the study of the mathematical properties and applications of classical and generalized divergence measures from an information-theoretic perspective. It mainly deals with two key generalizations of the relative entropy: namely, the R_ényi divergence and the important class of f -divergences. It is our hope that the readers will find interest in this Special Issue, which will stimulate further research in the study of the mathematical foundations and applications of divergence measures
Annual Report of the University, 1999-2000, Volumes 1-4
The Robert O. Anderson School and Graduate School of Management at The University of New Mexico Period of Report: July 1, 1999 to June 30, 2000 Submitted by Howard L. Smith, Dean The Anderson Schools of Management is divided into four distinct divisions- the Department of Accounting; the Department of Finance, International and Technology Management; the Department of Marketing, Information and Decision Sciences; and the Department of Organizational Studies. This structure provides an opportunity for The Anderson Schools to develop four distinct areas of excellence, proven by results reported here. I. Significant Developments During the Academic Year The Anderson Schools of Management • As a result of the multi-year gift from the Ford Motor Company, completed renovation of The Schools\u27 Advisement and Placement Center, as well as all student organization offices. • The Ford gift also provided for $100,000 to support faculty research, case studies and course development. • The Schools revised the MBA curriculum to meet the changing needs of professional, advanced business education. • The Schools updated computer laboratory facilities, with the addition of a 45-unit cluster for teaching and student work. • The faculty and staff of The Schools furthered outreach in economic development activities by participating directly as committee members and leaders in the cluster workgroups of the Next Generation Economy Initiative. • The faculty, staff and students of The Schools contributed to the development of the Ethics in Business Awards; particularly exciting was the fact that all nominee packages were developed by student teams from The Anderson Schools. • The Schools continue to generate more credit hours per faculty member than any other division of the UNM community. The Accounting Department • Preparation and presentation of a progress report to accrediting body, the AACSB. The Department of Finance, International and Technology Management • The Department continued to focus on expansion of the Management of Technology program as a strategic strength of The Schools. The Department of Marketing. Information and Decision Sciences • Generated 9022 credit hours, with a student enrollment of 3070. The Department of Organizational Studies • Coordinated the 9th UNM Universidad de Guanajuato (UG) Mexico Student Exchange