Page
%P
-
Article
An efficient computational method for solving nonlinear matrix equation and its application in queuing analysis
The matrix analytic analysis of queues with complex arrival, vacation and service characteristics requires the solution of nonlinear matrix equation. The complexity and large dimensionality of the model requir...
-
Book
-
Chapter
Theoretical Foundations of Digital Communications
The generic communications system of interest in this book is depicted in Figure 2.1. This model contains most of the elements which will be discussed in this and subsequent chapters. The output of an informat...
-
Chapter
Baseband Pulse Transmission
The foregoing chapters have given an overview of data communications, and reviewed topics in statistical communication theory, coding, and computer communication relevant to data communications analysis and sy...
-
Chapter
Synchronization: Carrier and Timing Recovery
The theme of this chapter might well be “…timing is everything.” In the course of our discussion in Chapter 4, we saw that the detection of a baseband digital data sequence presumed proper timing at the receiv...
-
Chapter
Topics in Digital Communications
In this chapter we discuss several advanced topics in digital communications. These concepts are advanced from two perspectives: (1) they represent a synthesis and/or an extension of material that has been dis...
-
Chapter
Automatic and Adaptive Equalization
Up to this point in the text, we have made two key assumptions in discussing the structures described in Chapter 7: we have assumed arbitrary receiver complexity and we have also assumed that the channel chara...
-
Chapter
Introduction to Data Communications
Data communication has been with us for a long time. Smoke signals, drum beats, and semaphore signals are examples that are commonly given; indeed, semaphore relay may be regarded as the first modern communica...
-
Chapter
Error Correcting and Detecting Codes
As we have seen in Section 2.5, information theory provides theoretical upper bounds on the information rates that can be obtained over physical channels. While these bounds can be computed for a wide range of...
-
Chapter
Passband Data Transmission
Modulation is the process by which a baseband information signal is converted into a passband signal that can transit a passband channel constrained in bandwidth and possibly other ways. In order to conserve b...
-
Chapter
Optimum Data Transmission
In Chapter 4, we examined signal design for baseband pulse transmission, and described the compromises among the bandwidth of the transmitted signal, noise immunity, and mitigation of intersymbol interference ...
-
Chapter
Echo Cancellation
The simplest way to realize full-duplex data communication is by using completely separate transmission media for the two directions of transmission. But often, only a single, bilateral (simultaneous two-way) tra...
-
Book
-
Chapter
Imbedded Markov Chains
The queueing model considered to this point is predicated on exponentially distributed service times. This is appropriate to voice communications where the holding time of a call is exponentially distributed. ...
-
Chapter
Basic Orientation
Computer communications has recently emerged from its origins—the fields of computers and communications—as a separate, distinct area of study. We hope a complete picture of the field will become apparent in t...
-
Chapter
Networks of Queues
An appropriate model for a number of systems is a network of queues in which the output of one queue is fed into another. Under a wide range of assumptions, these networks may be modeled and analyzed by means ...
-
Chapter
Routing-Flow Allocation
As stated in the previous chapter, the two techniques that are used to control congestion within a network are flow control and routing. Hiaving considered flow control we now turn to routing. The goal of rout...
-
Chapter
Protocols and Facilities
In this chapter the general framework for the mathematical models to be presented in the remainder of the text is constructed. In consonance with the objectives of this book, only limited detail is presented. ...
-
Chapter
Intermittently Available Server, Priority Queues
It is frequently the case in communications systems that transmission facilities are shared among a number of different sources. In Chapter 5, for example, time-division multiplexing is used to distribute tran...
-
Chapter
Random Access Systems
The salient result that emerges from the analyses of polling systems in the previous chapter is the large impact of overhead—particularly at light loading. Because of overhead, performance deteriorates with th...
