Course 102 - Introduction To Wireless RF Engineering
Scope
This
two-day seminar provides a solid grounding in principles of basic wireless
system design and RF engineering. After
a brief appreciation of the development of cellular, it surveys the main analog
and digital standards in current use, noting specific features and capacity
implications. Propagation, wireless
antenna systems, and traffic engineering principles are thoroughly
introduced. Finally, wireless system
design, growth, and performance considerations are explored each student
receiving example files on disk.
Target Audience
Engineers,
technicians, and technical managers with technical backgrounds but limited wireless
experience.
Course Presentation Setting and Methods
Presented
in a classroom setting using computer projection with student workbooks.
Topical Outline
Introduction
¨
Brief
History of Radio
¨
Historical
Development of Telephony
¨
Convergence
of Radio and Telephony: Modern Wireless Systems
¨
Early
Systems: MTS, IMTS
¨
Analog
Cellular: AMPS, NAMPS, E/J/NTACS, NMT450/900
¨
First
to exploit frequency reuse, trunking efficiency
¨
Business
development of AMPS in US/Canada
¨
US
TDMA Digital Cellular: USDC/IS54/IS136
¨
GSM
TDMA Digital Cellular: GSM/900,
DCS-1800/1900
¨
CDMA
IS-95/J-STD008
¨
Business
development of PCS in US/Canada
¨
Japanese
Systems: PDC, PHS
¨
Wideband
CDMA & Omnipoint
¨
Technical
Summary and Comparison of all technologies
¨
Modulation
schemes, channel bandwidths, required C/I
¨
Occupied
Bandwidth: Shannon on BW vs.
reliability
¨
Spread
Spectrum principles: CDMA overview
¨ Wireless Applications
¨
Traditional
Cellular
¨
PCS
features
¨
Local
Loop service
Radio Propagation Basics for Wireless
¨
Frequency
and Wavelength
¨
The
Physics of Propagation: Free Space,
Reflection, Diffraction
¨
Local
Variability: Rayleigh fading and
multipath cancellation
¨
Area
Propagation Models: Okumura, HATA, Cost
231
¨
Point-to-Point
Models: techniques and commercial
software
¨
Analyzing
measured data to produce models
¨
Reliability
of Service: using statistics to design
for reliability
¨
Macro-cell
Indoor Penetration Considerations and reliability
¨
Micro-cellular
systems and techniques
Antennas for Wireless
¨
Basic Antennas:
Isotropic and Dipole radiators
¨
Concept
of Antenna Gain and gain references
¨
Effective
Radiated Power
¨
Antenna
Patterns and Pattern Features
¨
How
Antennas achieve Gain
¨
Reflector
techniques, array techniques
¨
Families
of Antennas used in Wireless: architecture, characteristics
¨
Collinear
vertical antennas
¨
Horizontal
arrays: yagis, log-periodics, etc.
¨
Implications
of propagation driving antenna selection
¨
Multipath
scattering in mobile clutter environment
¨
Beamwidth
and tilt considerations for base station antennas
Basic Principles of Traffic Engineering for Wireless
¨
Terms
and Basic Concepts
¨
Traffic
Units (Erlangs, CCS, Minutes)
¨
Trunks,
Circuits, Voice Paths
¨
Offered
Traffic vs. Carried Traffic
¨
Blocking
Probability, Grade of Service
¨
Basic
Operational Concepts
¨
Using
Traffic Tables
¨
Principle
of Trunking Efficiency
Link Budgets and High-Level System Design
¨
Link
Budget basics and application principles
¨
Traffic
Considerations
¨
Determining
Number of Cells Required
Optional Background Material for Wireless: Basic Facts (reviewed as appropriate for specific audiences depending on interests and job function)
¨
Calculating
levels in decibels
¨
Receiver
Basics
¨
Superheterodyne
architecture, frequency conversion, images
¨
Sensitivity: noise basics
¨
Dynamic
range and intermodulation considerations
¨
Transmitter
Basics
¨
Linear
vs. non-linear amplifiers
¨
PCM
transmission: sampling and the DS-0
¨
Nyquist’s
Theorem, audio bandwidth
¨
Telephone
Transmission Heirarchy
¨
Copper: DS-0, DS-1, DS-3
¨
Fiber: OC-1, OC-3, etc.
Prerequisites
Basic
technical mathematics; exposure to general electronics
Course Documentation and Materials
Student
guide
Miscellaneous
supplies
Facilities and Hardware Requirements
Classroom
suitable for student note-taking and a screen or other projection surface
Return to CDMA Courses and Contents
Scott Baxter
& Associates
PO Box 158777
Nashville,
Tennessee 37215
USA
Phone (800)
890-0829
Fax (866)
244-4105