NDLI: Performance of Multilevel PCM

Content Provider	IEEE Xplore Digital Library
Author	Sage, Gerald F.
Copyright Year	1965
Abstract	Up to now, the design of space communications systems has been dominated by the low received power which characterizes these systems. Two changing conditions will alter this emphasis. The first is the increase in available transmitter power caused by increased booster capability. The second is the reduction in available bandwidth due to a great increase in traffic requirements. Present systems use modulation systems which require minimum power at the expense of lavish use of bandwidth. Future systems must find a better compromise of characteristics. Multilevel pulse code modulation (PCM) is a modulation system offering such a compromise. Multilevel PCM is an extension of binary PCM to multilevel signals. In multilevel PCM the signal is sampled, quantized, and the value of the quantized sample is represented by a stream of symbols which may have any number of levels. Multilevel PCM was described and the approximate performance was computed in 1948 by Oliver, Pierce, and Shannon. Since then it has largely been ignored. This is the first exact computation of performance. The performance of multilevel PCM is compared with other systems on an equal bandwidth basis. It is found that multilevel PCM requires less input power than any commonly used modulation system of equal bandwidth. For example, to obtain 60-db signalto-noise ratio out and using only twice the information bandwidth, multilevel PCM requires 20 db less input power than any commonly used modulation system.
Starting Page	353
Ending Page	361
Page Count	9
File Size	1042912
File Format	PDF
ISSN	00189251
Volume Number	AES-2
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1966-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase change materials Bandwidth Quantization Pulse modulation Modulation coding Noise level Signal to noise ratio Transmitters Frequency RF signals
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Aerospace Engineering

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

Interference Characteristics of Pulse-Time Modulation

Consideration of RF Parameters for PCM Telemetry Systems

On the Optimum Design of PCM Signals with System Constraints

Influence of Bandwidth Restriction on the Signal-to-Noise Performance of a PCM/NRZ Signal

On Bandwidth Requirements for Multilevel PCM Encoders

Choosing a Vision Model for Optimizing DPCM Video

Signal-to-Noise-Ratio Improvement in a PCM System

Discriminator Detection of Wide-Band PCM/FM

PCM/FM Telemetry Signal Analysis and Bandwidth Effects

Performance of Multilevel PCM

Similar Documents

Interference Characteristics of Pulse-Time Modulation

Consideration of RF Parameters for PCM Telemetry Systems

On the Optimum Design of PCM Signals with System Constraints

Influence of Bandwidth Restriction on the Signal-to-Noise Performance of a PCM/NRZ Signal

On Bandwidth Requirements for Multilevel PCM Encoders

Choosing a Vision Model for Optimizing DPCM Video

Signal-to-Noise-Ratio Improvement in a PCM System

Discriminator Detection of Wide-Band PCM/FM

PCM/FM Telemetry Signal Analysis and Bandwidth Effects

Performance of Multilevel PCM