introduction to cellular mobile communication system
Mobile Communication System Evolution
Ngày tải lên :
14/09/2012, 11:26
... interface of the MS to enable the user to access
services. A SIM card provides the ability to personalise a mobile phone. This is a
smart card that needs to be inserted into the mobile phone before ... technology had developed sufficiently to allow
the commercial implementation of such a system to be investigated.
The evolution of mobile communications can be categorised into generations of develop-
ment. ... Such networks
were introduced into service in the 1980s. These networks were designed to provide voice
communications to the mobile user.
Second-generation (2G) systems are categorised by digital...
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Mobile Communication System Evolution
Ngày tải lên :
14/09/2012, 11:26
... Channel
FPLMTS Future Public Land Mobile Telecommunication Systems
FS Fixed Station
FSK Frequency Shift Keying
FSL Free Space Loss
FTP File Transfer Protocol
Mobile Satellite Communication Networks344
FVC ... Amplifier
LO Local Oscillator
LOS Line-of-Sight
LS Location Server
MAHO Mobile Assisted HO
MAP Mobile Application Part
MAP Maximum a Posteriori
MBCF Mobile BCF
MCC Mobile Country Code
MCF Mobile Control ... Positioning System
GRAN Generic Radio Access Network
GSC Gateway Station Control
GSM Global System for Mobile Communications
GSN GPRS Support Node
GSO Geostationary Orbit
GTP GPRS Tunnelling Protocol
GTS...
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Roland SIEGWART Illah R. NOURBAKHSH Introduction to Autonomous Mobile Robots pot
Ngày tải lên :
05/03/2014, 15:20
... stability.
Unlike automobiles, which are largely designed for a highly standardized environment
(the road network), mobile robots are designed for applications in a wide variety of situa-
tions. Automobiles ... final part of chapter 5 is devoted to a discussion of the challenges and most
promising techniques for mobile robots to autonomously map their surroundings.
Mobile robotics is so young a discipline ... provide mobile robotics with such
a preparatory guide.
This book presents an introduction to the fundamentals of mobile robotics, spanning the
mechanical, motor, sensory, perceptual and cognitive...
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Module 3 Introduction to Information and Communication Technologies (ICTs) pdf
Ngày tải lên :
08/03/2014, 20:20
... objective of Module 3
ã
To improve the library staff to know about how to use ICts as computer including using internet …
Good Afternoon!
Module 3
Introduction to Information
and Communication
Technologies ... 3
Introduction to Information
and Communication
Technologies (ICTs)
-
Lesson 1: Why do librarians need to know about ICTs and acquire skill in their use?
-
Lesson 2: How do computer work?
-
Lesson 3: ... and issues in ICT development affecting libraries?
The level of student
ã Students who will come to study might have basic about using computer before
Teaching Plan
ã By 3p
-Presentation
-Practice
-Production
...
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Introduction to mechatronics and measurement systems david alciatore
Ngày tải lên :
08/04/2014, 11:14
... and interconnections in the system. The input
devices include a pot to control the speed manually, four buttons to select predefined posi-
tions, and a mode button to toggle between speed and position ... Demo
1.7Stepper
motor position and
speed controller
Figure 1.7 Photograph of the stepper motor position and speed controller.
mode
button
speed
pot
position
buttons
stepper
motor
motion
indicato
r
A/D
PIC
stepper ... began to stretch across ever wider abysses and to climb to dizzying
heights, manufacturing moved from the shop bench to large factories; and to support
these technical feats, people began to specialize...
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Báo cáo hóa học: "System-Level Performance of Antenna Arrays in CDMA-Based Cellular Mobile Radio Systems Andreas Czylwik" pptx
Ngày tải lên :
23/06/2014, 01:20
... antennas per sector (a
R
= 20 dB), (d) sectorized system
with a single sector antenna per sector (a
R
= 60 dB), (e) sectorized
system with ULAs in each sector, four sector antennas per sector
(a
R
= ... reference system with omnidirectional antenna ele-
ments, (b) sectorized system with a sing le sector antenna per sec-
tor (a
R
= 20dB),(c)sectorizedsystemwithULAsineachsector,
four sector antennas ... antenna elements,
(b) sectorized system with a sing le sector antenna per sector, (c) sec-
torized system with ULAs in each sector, four antenna elements per
sector, and (d) system with circular...
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cellular mobile radio systems designing systems for capacity optimization
Ngày tải lên :
03/07/2014, 21:45
... often, leading to a higher spectral
efficiency. Examples of analogue cellular land mobile radio systems
are AMPS (Advanced Mobile Phone System) in the USA, TACS (Total
Access Cellular System) in ... measure Channel/MHz is suitable
for point -to- point radio communications or one cell mobile radio
systems, it is not adequate for cellular land mobile radio systems.
2.3.4 Erlangs/MHz
In this measure ... the system so as to
be able to predict the effect of all significant co-channel interfer-
ing signals on the desired one.
4 INTRODUCTION
Cellular Mobile Radio Systems: Designing Systems for Capacity...
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INTRODUCTION TO RELATIONAL DATABASE MANAGEMENT SYSTEM ppsx
Ngày tải lên :
01/08/2014, 09:22
... Desi
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Lesson 1 / Slide 2 of 12âNIIT
Introduction to Relational Database
Management System
Introduction to Database
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ã
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Lesson 1 / Slide 4 of 12âNIIT
Introduction to Relational Database
Management System
Why use a Database Management
System?
ã
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Introduction to Relational Database Management
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Lesson 1 / Slide 6 of 12âNIIT
Introduction to Relational Database
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Functional Components of a Database
Management System
ã
The...
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MIT.Press.Introduction.to.Autonomous.Mobile.Robots part 1 doc
Ngày tải lên :
10/08/2014, 05:20
... to Mobile Robots 314
Index 317
Autonomous
Mobile Robots
Introduction to
Roland
Illah R.
SIEGWART
NOURBAKHSH
Autonomous Mobile Robots
SIEGWART and NOURBAKHSH
Introduction to
Introduction to ... localization strategies, autonomous mapping, and navigation
competence. Bringing together all aspects of mobile robotics into one volume,
Introduction to Autonomous Mobile Robots can serve as ... Metro. Introduction to Autonomous
Mobile Robots offers students and other interested readers an overview of the
technology of mobility—the mechanisms that allow a mobile robot to move
through a...
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MIT.Press.Introduction.to.Autonomous.Mobile.Robots part 2 pptx
Ngày tải lên :
10/08/2014, 05:20
... mobile robot systems that we will use
throughout this text. This figure identifies many of the main bodies of knowledge associ-
ated with mobile robotics.
This book provides an introduction to ... force stops.
But a robot must be able to lift its legs in order to walk. In order to achieve static walk-
ing, a robot must have at least six legs. In such a configuration, it is possible to design ... final part of chapter 5 is devoted to a discussion of the challenges and most
promising techniques for mobile robots to autonomously map their surroundings.
Mobile robotics is so young a discipline...
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MIT.Press.Introduction.to.Autonomous.Mobile.Robots Part 3 pdf
Ngày tải lên :
10/08/2014, 05:20
... sufficiently high torque to sup-
port the robot, yet back drivable for safety. In addition to developing custom motors and
software, Sony incorporated a color vision system that enables AIBO to chase ... person touches
AIBO on the chin.
8 Pause button: Press to activate AIBO or to
pause AIBO.
9 Chest light: Gives information about the
status of the robot.
10 Paw sensors: Located on the bottom of ... stability.
Unlike automobiles, which are largely designed for a highly standardized environment
(the road network), mobile robots are designed for applications in a wide variety of situa-
tions. Automobiles...
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MIT.Press.Introduction.to.Autonomous.Mobile.Robots Part 4 potx
Ngày tải lên :
10/08/2014, 05:20
... the same token, if each
of the chair’s castor wheels housed two motors, one for spinning and one for steering, then
a control system would be able to move the chair along any trajectory in the ... robot both in order to design appro-
priate mobile robots for tasks and to understand how to create control software for an
instance of mobile robot hardware.
Of course, mobile robots are not ... θ()ξ
·
I
0=
β
Y
R
α
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0
=
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48 Chapter 3
mobile robot is a self-contained automaton that can wholly move with respect to its envi-
ronment. There is no direct way to measure a mobile robot’s position instantaneously.
Instead,...
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MIT.Press.Introduction.to.Autonomous.Mobile.Robots Part 7 pot
Ngày tải lên :
10/08/2014, 05:20
... sensitive to light between 400 and 1000 nm wavelength.
It is important to remember that photodiodes are less sensitive to the ultraviolet end of the
spectrum (e.g., blue) and are overly sensitive to ... and green. It is not uncommon to assume at least one to two bits of addi-
tional noise on the blue channel. Although there is no satisfactory solution to this problem
today, over time the processes ... real time access to the pixels, usually in a single,
ordered pass.
At the highest level, a roboticist may choose instead to utilize a higher-level digital
transport protocol to communicate with...
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MIT.Press.Introduction.to.Autonomous.Mobile.Robots Part 8 pot
Ngày tải lên :
10/08/2014, 05:20
... 4
control systems for mobile robots exclusively using optical flow have not yet proved to be
broadly effective.
4.1.8.4 Color-tracking sensors
Although depth from stereo will doubtless prove to be ... practice.
In order to optimize the range of distances that can be recovered, it is often useful to turn
the cameras inward toward one another, for example. Figure 4.22 shows the orientation
vectors that ... different
objects in the scene are moving in different directions with respect to the vision system. Of
course, such situations will tend to include edges, and so this may introduce a useful visual
cue.
Because...
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