By Topic

Selected Areas in Communications, IEEE Journal on

Issue 1 • Date January 1984

Filter Results

Displaying Results 1 - 25 of 25
  • [Front cover and table of contents]

    Publication Year: 1984 , Page(s): 0
    Save to Project icon | Request Permissions | PDF file iconPDF (262 KB)  
    Freely Available from IEEE
  • [Back cover]

    Publication Year: 1984 , Page(s): 0
    Save to Project icon | Request Permissions | PDF file iconPDF (426 KB)  
    Freely Available from IEEE
  • Computer-Aided Modeling, Analysis, and Design of Communication Systems: Introduction and Issue Overview

    Publication Year: 1984 , Page(s): 1 - 8
    Cited by:  Papers (8)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1009 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Interactive Communication Systems Simulation Model - ICSSM

    Publication Year: 1984 , Page(s): 102 - 128
    Cited by:  Papers (6)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2290 KB)  

    The design of ICSSM, a nonreal time computer-aided simulation and analysis tool for communications systems, is presented, ICSSM is capable of supporting modeling, simulation, and analysis of any system representable in terms of a network of multiport functional blocks. Its applicability is limited only by the modeler's ingenuity to decompose the system to functional blocks and to represent these functional blocks algorithmically. ICSSM has been constructed modularly, consisting of five subsystems to facilitate the tasks of formulating the model, exercising the model, evaluating and showing the simulation results, and storing and maintaining a library of modeling elements, analysis, and utility subroutines. It is written exclusively in ANSI Standard Fortran IV language, and is now operational in a Honeywell DPS 7/80 M computer under the MULTICS Operating System. Description of a recent simulation using ICSSM and some generic moduels of general interest developed as a result of the modeling work are also presented. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Tool for Structured Functional Simulation

    Publication Year: 1984 , Page(s): 137 - 147
    Cited by:  Papers (32)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1238 KB)  

    BLOSIM is a general purpose time-driven (as opposed to event-driven) simulation language. It is written in C language, and is intended to provide a highly structured environment for simulations, thereby making practical the accumulation of libraries of simulation routines which can be reused and making multiprogrammer simulation efforts more practical. It is written with the philosophy of not including any simulation primitives within the language itself, but rather complete generality is maintained by having the user provide these as C routines (either coded from scratch or from a user-provided library). It includes as features a hierarchical specification of blocks, interconnection of blocks by first-in first-out buffers, the passing of parameters to blocks, multiple instances of blocks, and automatic scheduling of the order of block execution. It has been used for the multiprogrammer simulation of data transmission and speech processing systems, in both academic and industrial environments, with good results. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Transmission Line Modeling Program Written in C

    Publication Year: 1984 , Page(s): 148 - 153
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (585 KB)  

    LINEMOD is a transmission line modeling program that takes a line configuration (including possibly bridged taps) and generates the input impedance, attenuation versus frequency, and impulse response. It is written in C, a modern structured programming language, and utilizes sophisticated data structures, dynamic storage allocation, and recursion to achieve flexibility and economy of storage. As such, it illustrates the value of C as an implementation language for modeling programs of this type. It also emphasizes a shortcoming of C for this purpose, which is the absence of built-in complex arithmetic. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Computer Simulation of the Effect of Fading on a Quasi-Synchronous Sideband Diversity AM Mobile Radio Scheme

    Publication Year: 1984 , Page(s): 191 - 203
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1235 KB)  

    In this contribution, a software multipath fading simulation package (previously applied to the statistical analysis of the fading statistics of single transmitter schemes for three very different mobile radio environments) is used to analyze the performance of a quasi-synchronous, multitransmitter, amplitude modulated sideband diversity area coverage system. By conducting field trials in an area known to obey Rayleigh fading statistics, it has been possible to compare the simulated statistical results to those obtained theoretically and experimentally, and to show that good agreement exists. The fading simulator is capable of being extended to other types of multitransmitter radio scheme employing different forms of modulation. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An Efficient Simulation Technique for Performance Studies of CSMA/CD Local Network

    Publication Year: 1984 , Page(s): 238 - 249
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1113 KB)  

    A new simulation technique is presented for performance studies of local area networks which use CSMA/CD as the access protocol. The method requires partitioning the network stations into a few primary stations and the remainder as background stations. The background stations are modeled as a group by a background algorithm based on a dynamic CSMA/CD model which uses a set of probabilities and sampling to produce, in a recurrent manner, a stochastic sequence of busy/idle periods. The new method is more efficient than conventional discrete-event simulations when the number of network stations is reasonably large. The algorithm and the overall simulation technique are comprehensively validated. The technique is illustrated with a performance study of interactive transactions on a metropolitan CATV network. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Correction to "Overview of a Broad-Band Local Area Network Protocol Architecture"

    Publication Year: 1984 , Page(s): 277
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (150 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Interactive Simulation of Digital Communication Systems

    Publication Year: 1984 , Page(s): 51 - 76
    Cited by:  Papers (15)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2416 KB)  

    In this paper we describe efforts to develop a comprehensive tool for the digital simulation of a wide variety of point-to-point digital communication systems. These efforts have resulted in the interactive communications simulator (ICS); a flexible, graphics-oriented, and highly interactive hardware/software system consisting of a typical minicomputer acting as host to a fast peripheral array processor. This system is presently being employed both to evaluate existing modem performance and to explore new modulation/coding concepts appropriate for military, commercial, and space applications. A detailed functional description of the ICS is provided together with pertinent software considerations. An outline of existing ICS capabilities is presented and illustrated through typical, graphical output. A thorough discussion of channel modeling considerations is provided. The use of the ICS in the overall design of receiver structures for impulsive noise channels will be illustrated. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Techniques for Estimating the Bit Error Rate in the Simulation of Digital Communication Systems

    Publication Year: 1984 , Page(s): 153 - 170
    Cited by:  Papers (209)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1784 KB)  

    Computer simulation is often used to estimate the bit error rate (BER) performance of digital communication systems. There are a number of distinct techniques in the simulation context that can be used to construct this estimate. A tutorial exposition of such techniques is provided, with particular reference to five specific methods which can be implemented in a simulation. These methods range from the traditional Monte Carlo trials to assumption of definite forms for the noise statistics. An attempt is made to show how these methods are related, and the specific assumptions that are invoked in order to apply them. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Generation and Use of Bit Error Rate Surface Plots

    Publication Year: 1984 , Page(s): 185 - 190
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (800 KB)  

    Pseudo-3D plots of BER as a function of carrier phase and sampling time provide a useful aid to understanding the properties of modulation schemes with coherent demodulation. This paper describes the production of such plots. Techniques used to reduce the computing effort and a potential problem and its solution are discussed. Example BER surface plots are presented and discussed in comparison with more conventional representations of the same information. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simulation System for Analog and Digital Transmissions

    Publication Year: 1984 , Page(s): 77 - 88
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1272 KB)  

    In this paper a complete communication system simulation package is described, which includes digital as well as analog operations to be performed on the signal to be transmitted. The package simulates the transmitter, the communication channel, and the receiver. The digital transmission simulation considers data communication systems with digital filtering, source and channel coding performing the operations of transmitter coding and receiver decoding. The two coding operations can be realized both separately and independently and in a strictly connected or "integrated" form. The analog transmission simulation includes the modulator, the transmitter pulse shaping filter, the communication channel, the receiving filter, and the demodulator. This section is very general, so that it allows the simulation of both analog and digital transmissions. Simulation results are presented regarding some combinations of the following techniques: predictive source coding, block codes able to correct random and burst errors, and modulation techniques such as AM, M -level PSK, FSK, and MSK. In particular, the paper presents the results of the analyses of an integrated source-channel coding applied to digital transmissions and of a system transmitting both voice and data for a VHF communication link between ground and aircraft for air traffic control applications. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On the Design of Downlinks for Satellite Commuication Systems Using TFM and Convolutional Codes: A Simulation Approach with TOPSIM III

    Publication Year: 1984 , Page(s): 42 - 50
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (808 KB)  

    The performance of a TFM scheme applied to a satellite downlink with an on-board regenerative repeater is evaluated by using a time domain simulation software package TOPSIM III. The TFM bit error rate in the presence of nonlinearities and adjacent channel interference is evaluated by means of semianalytic methods. The capabilities of convolutional codes for reducing the overall channel bit error rate are also investigated. Design guidelines are finally outlined for advanced satellite communication systems in which the joint use of nonconventional modulation schemes (like TFM) and of convolutional codes results in improved performance with respect to both bandwidth exploitation and system flexibility. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance Evaluation Tool (PET): An Analysis Tool for Computer Communication Networks

    Publication Year: 1984 , Page(s): 220 - 226
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (824 KB)  

    The performance evaluation tool (PET) is a package to aid the designers of architecture and protocols of computer networks. It is specially targeted, but not limited, to IBM's systems network architecture (SNA) networks. The tool allows its users the capability to easily construct simulation models of networks and conduct traffic related performance studies. PET is based on the research queueing package (RESQ)-version 2, which is a package for constructing and analyzing extended queueing network models. The two key features of PET are ease of use and flexibility. The user specifies the network configuration with the aid of an interactive "networking language." This includes a description of the type of representation he/she desires for the various protocols at different layers of the architecture. Based on these specifications, PET builds a RESQ simulation model for the network by piecing together many "submodels." Each submodel is a model of a certain network component (e.g., communication link) or a protocol (e.g., data link control). The submodels may either be prebuilt (stored in the PET library) or built dynamically according to user specifications. There can be several submodels for the same function capturing different levels of detail. Thus, a variety of network models with different types of components and with varying levels of detail can be constructed. Facilities to perform parametric studies and provide user specified output statistics (such as link utilizations and buffer usage statistics) are also available in PET. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Computer-Aided Design of Digital Lightwave Systems

    Publication Year: 1984 , Page(s): 171 - 185
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1488 KB)  

    Models and analysis methods suitable for computer-aided design of digital lightwave systems are reviewed. An overview of a digital lightwave system is described along with properties of system components. Models for system degradations due to the source waveform, fiber dispersion, and noise are developed. Various analytical methods used to compute error rate, eye margin, and power penalty are described and compared. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Queueing Network Simulations of Computer Communication

    Publication Year: 1984 , Page(s): 203 - 220
    Cited by:  Papers (14)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1568 KB)  

    Queueing networks are a powerful abstraction for modeling systems involving contention for resources, e.g., manufacturing lines and computer systems. Queueing networks are especially effective in modeling computer communication systems. Most papers concerning queueing models of communication describe analytic solution of queueing models. This paper describes simulation models based on "extended" queueing networks. The primary advantage of using a queueing network representation for simulation of a computer communication system is the high level of description, in comparison with conventional simulation programming languages. For queueing network models to be used effectively for simulation of contention systems, appropriate software is needed. The research queueing package (RESQ) is a general purpose tool for modeling contention for resources and associated system characteristics. RESQ facilitates i) appropriate abstraction of system characteristics through its definitions of extended queueing networks, ii) efficient and convenient definition and revision of models through its integrated interactive and batch model definition interface, and iii) effective experimentation with simulation models through facilities for parameterized sets of experiments, interactive running of simulations and statistical analysis of simulation results. With a tool such as RESQ, an analyst can produce results in days instead of weeks, and so an analyst can answer questions which otherwise would be left unanswered. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Modeling and Simulation of a Circuit Switched Distributed Interactive Terminal Network

    Publication Year: 1984 , Page(s): 258 - 263
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (608 KB)  

    The newly installed terminal switching network at Sandia National Laboratories has been modeled with analytic and simulation techniques. Using classical queuing techniques and parameters derived from recorded usage data, fair and equitable allocations of interactive computer ports have been made. The allocations were then refined through the use of simulation techniques. The effect of balking as an alternative to entering queues has been shown to have substantial performance and stabilization effects on the network. In addition, it was found that the probability of balking as a function of queue length is not a monotonically increasing function. The simulation programs are also used to evaluate the performance of other interactive computer systems when subjected to various loads. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Communication System Simulation and Analysis with SYSTID

    Publication Year: 1984 , Page(s): 8 - 29
    Cited by:  Papers (24)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2040 KB)  

    The design of satellite and deep space communications systems frequently involves problems that cannot be solved through pure analysis. In these cases simulation is an invaluable system design tool. This paper describes a flexible communication system simulation package, SYSTID, which has been under continual development and use at Hughes Space and Communications Group for over 15 years. We discuss the history of SYSTID's development as well as its internal workings. Both the software structure and analytic techniques are described. The paper includes several examples, one of which demonstrates SYSTID's topological input language. Hardware comparisons which show the accuracy and limitations of the simulation approach are also presented. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • CLASS: A Comprehensive Satellite Link Simulation Package

    Publication Year: 1984 , Page(s): 129 - 137
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (888 KB)  

    CLASS (communication link analysis and simulation system) is a software package developed for NASA to predict the communication and tracking performance of the tracking and data relay satellite system (TDRSS) services. This paper describes the capabilities of CLASS and the communication link model used, and discusses typical applications for CLASS. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Bursty Traffic Local Network Modeling

    Publication Year: 1984 , Page(s): 250 - 258
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1032 KB)  

    A computer program to predict the performance of local area networks based on an Ethernet or other medium is described. The effects of bursty traffic are modeled as packet streams which are initially bulk Poisson, but whose clusters spread apart as they propagate through the network. It is shown by example that performance predictions using more conventional Poisson assumptions tend to be optimistic, often extremely so. The program presents a friendly, dialogue-oriented user interface, including a library of rather sophisticated transaction types for network loading. A simulator is included in the program to validate its analytical approximations, and two example simulations are presented. Although approximation errors can be large in highly bursty situations, these errors appear to be much less than those which would be obtained by treating bursty traffic as if it were Poisson. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Digital Simulation of Communication Systems with TOPSIM III

    Publication Year: 1984 , Page(s): 29 - 42
    Cited by:  Papers (23)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1440 KB)  

    TOPSIM III is a flexible, easy to use, stand-alone Fortran package for the digital simulation of communication systems in the time domain. TOPSIM III provides a simple high-level language for the description of the system. Programs can be written following the same structure used in drawing the system block diagram. The paper discusses the time domain simulation approach used in the design of the package and describes its capabilities. The contents of the subprogram libraries are presented, describing some of the building blocks that can be used in the simulation as well as the performance evaluation facilities available in the package. Some simple examples illustrate the use of TOPSIM III as a tool for analysis and design of digital communication systems. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design Tradeoffs for Local Access Systems in Computer Networks

    Publication Year: 1984 , Page(s): 264 - 277
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1080 KB)  

    A computer-aided design tool has been developed to study the hardware/software structure of various types of data switching systems used in the local loop distribution of computer communication networks. A simulation package is used to evaluate the performance parameters (such as the system throughput, average message delay, and probability of data loss) of local access systems under different input traffic conditions. Two types of traffic commonly used in teleprocessing applications are considered: the inquiry/response mode and the file transfer mode. Design tradeoffs for a line concentrator and a message interswitch are discussed and their performance is compared. The message interswitch permits a number of low-speed terminals to share communication lines and also to gain access to local common resources such as line printers, databases, and optical character readers. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Computer Modeling and Simulation of Communications Satellite Channels

    Publication Year: 1984 , Page(s): 89 - 102
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1264 KB)  

    Computer modeling of satellite communications channels is a valuable adjunct to analytical modeling and hardware simulation for predicting and verifying communications link performance. In the computer simulation approach, sampled signals are created in the computer and operated on by algorithms that simulate the effects of filtering, channel nonlinearities, interference, and noise. After passage through the simulated channel, the distorted signals are demodulated to determine the performance degradation introduced by the channel. This paper describes the approach used in simulating communications channels on the computer. Examples are given that apply to the communications satellite channel; however, the techniques described are applicable to general channel configurations. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Design and Simulation of a Mobile Radio Network with Distributed Control

    Publication Year: 1984 , Page(s): 226 - 237
    Cited by:  Papers (81)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1376 KB)  

    A new architecture for mobile radio networks, called the linked cluster architecture, is described, and methods for implementing this architecture using distributed control techniques are presented. We illustrate how fully distributed control methods can be combined with hierarchical control to create a network that is robust with respect to both node loss and connectivity changes. Two distributed algorithms are presented that deal with the formation and linkage of clusters and the activation of the network links. To study the performance of our network structuring algorithms, a simulation model was developed. The use of Simula to construct, software simulation tools is illustrated. Simulation results are shown for the example of a high frequency (HF) intratask force (ITF) communication network. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

IEEE Journal on Selected Areas in Communications focuses on all telecommunications, including telephone, telegraphy, facsimile, and point-to-point television, by electromagnetic propagation.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Muriel Médard
MIT