NDLI: Increasing signaling power not necessarily improves channel capacity

Content Provider	IEEE Xplore Digital Library
Author	Mathar, R. Schmeink, A.
Copyright Year	2010
Description	Author affiliation: Inst. for Theoretical Information Technology, RWTH Aachen University, D-52056, Germany (Mathar, R.) \|\| UMIC Research Center, RWTH Aachen University, D-52056, Germany (Schmeink, A.)
Abstract	This work is inspired by the general question of how to choose signaling points from a bounded set such that capacity of the corresponding channel is maximized. Since subject to peak power constraints capacity achieving distributions become discrete, this question is most relevant for practical application. However, a solution seems to be difficult in general. In this paper we confine ourselves to determining optimum signaling points for selected schemes. As a key problem, determining the entropy of mixture distributions is identified, which is of interest in itself and is also relevant for other information processing applications. Even for the equiprobable mixture of two Gaussians no simple analytical expression is known. For 2-PAM signaling we investigate two simpler noise distributions, the triangular and chopped uniform one, and determine the capacity of the corresponding channels. While in the first case capacity increases monotonically as signaling points become further apart, in the second monotonicity does not hold. We finally conjecture that monotonicity can be concluded from the behavior of the equivalent binary asymmetric channel.
Starting Page	1
Ending Page	5
File Size	750795
Page Count	5
File Format	PDF
ISBN	9781424479085
e-ISBN	9781424479078
e-ISBN	9781424479061
DOI	10.1109/ICSPCS.2010.5709735
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-12-13
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency modulation
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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