40030 ˮMicrowave Transmission Networksˮ

Course Code

40030

 

Description

Through this course attendants will understand the essentials of radio systems engineering. Description of the transmission network of RAN & UTRAN is given as example and basic transmission rate hierarchy is provided as well.

Practical exercises and case studies will be presented to illustrate principles. Also some sw tools might be included, depending on customer request

 

Learning objectives

On completion of this course the participants will be able to:

1. Transmission Networks

  • Short haul microwave networks
  • Long haul microwave networks


2. Transmission Rates Hierarchy

  • PCM basics
  • PDH network
  • SDH network
  • ATM basicsʼ


3. Network Topologies

  • Tandem configurations
  • Star configurations
  • Mesh configurations
  • Star-Mesh configurations
  • Mixed networks
  • Transmission networks for Cellular
  • GSM: PCM over Optical; PDH, SDH
  • GPRS: IP over Ethernet and Frame Relay
  • UMTS: Frames over ATM
  • LTE: IP based traffic, the MBPN network
  • exercises


4. Brief Introduction to Wireless Radio Communications

  • Wireless systems design challenges
  • The wireless channel
  • Propagation models
  • Large scale propagation
  • Small scale propagation
  • Rayleigh model
  • Ricean model
  • Nakagami model
  • Wireless multipath channels
  • Spatial channel models and antennas
  • Space-Frequency Diversity
  • exercises


5. Modulation Schemes

  • AM systems
  • FM systems
  • Digital Wireless systems
  • Line codes
  • ASK, FSK, PSK, MSK, QPSK, QAM modulation schemes presentation
  • Modulation techniques over fading channels


6. Key Radio Fundamentals

  • Equalization principles
  • Fundamental principles of channel coding
  • Error correction & error detection principles
  • Introduction to Forward Error Correction Coding (FEC)
  • Block coding
  • Convolutional coding
  • Interleaving
  • Diversity principles
  • Multiple Access Techniques
  • FDMA
  • TDMA
  • Direct sequence spread spectrum principles
  • Automatic Transmission Power Control (ATPC)
  • Errorless Vs. Hitless Receiver Switching


7. Transmitter Receiver Characteristics

  • System Gain
  • Dispersive Fade Margin
  • Radio Thermal Noise
  • Signal to Noise ratio S/N
  • Receiver sensitivity
  • Modulation and S/N
  • Design principles
  • Case studies - exercises


8. Antenna System Considerations; Transmission Lines

  • Antenna classifications
  • Antenna types
  • Standard antennas
  • High performance antennas
  • Extra high performance antennas
  • Transmission lines basics
  • Antenna electrical characteristics (Gain, Antenna Lobes, Beam width, Antenna Polarization, VSWR)
  • Antenna system accessories (Antenna Dehydrators, Antenna Grounding, Antenna Fields)


9. Antenna Installations

  • Feeder cables
  • Customer library
  • Safety regulations
  • Mounting connectors
  • Sealing connectors
  • Antenna spacing and directioning requirements
  • Site Installation planning and procedures
  • Site Installation documentation
  • Earthing and lightning protection
  • Roxtec installation
  • Antenna system testing
  • Practical exercises


10. Microwave Propagation

  • Microwave propagations in Fading Free conditions
  • Fading Mechanisms in MW networks
  • Ground reflections
  • Radio meteorological parameters
  • Case studies - exercises

11. RF Exposure Principles

  • Outline the fundamental characteristics of a radio wave
  • Describe the exposure quantities (field strength and power density)
  • Understand dosimetric quantity Specific Absorption Rate (SAR)
  • Describe the guidelines relating to electromagnetic field exposure
  • Outline the major organizations setting RF exposure limits (ICNIRP, IEEE)
  • Describe RF exposure assessment methods and standards
  • Estimate the RF exposure from an antenna
  • Describe how to achieve a safe installation

 

Target audience

The target audience for this course is:

Radio Engineer, Service Engineer, Service Design Engineer, Network Design Engineer

 

Prerequisites

The participants should have an advanced knowledge in wireless/radio technology

Prerequisite course “Wireless Communication principles”

 

Duration and class size

The recommended length of the course is 3-5 days depending on the participants’ background. The maximum number of participants is 16

Learning situation

This course is based on theoretical instructor-led lessons given in a classroom environment.