RF Optimization Training

Duration: 4-5 days

Introduction

This course is a four day intensive training and workshop designed to teach the fundamentals of RF optimization, data collection, root cause analysis, system trade off considerations in order to maintain and improve subscriber quality of service for both GSM based and CDMA based modulation technologies.

RF Optimization Training

Related Courses

After completing this course, attendees will be able to:

Provide an understanding of RF performance degradation issues, testing and measurement techniques, data collection methodologies, post processing methodologies and tools, drive testing, model tuning, spectrum planning, hand off considerations, morphology analysis, cell splitting, antenna tilt azimuth, noise, SNR, BER, SIR, frequency planning, interference, in order to allow engineers and technical personnel to manage and maintain system performance of RF related systems.

RF Overview

  • Performance characteristics
  • RF engineering principles
  • Testing & measurement
  • Drive testing
  • Performance counters and key performance indicators (KPIs)
  • Data collection and post processing of data
  • Root Cause Analysis (RCA)
  • Spectrum utilization
  • Dropped calls
  • Poor coverage
  • Hard hand over failures
  • Soft hand over failures
  • Overview of optimization process for FFR modulation technologies
  • Overview of optimization process for CDMA modulation technologies

RF Operating Environment

  • Propagation models
  • Link budget analysis
  • Path loss
  • Reflection
  • Okamura/HATA
  • Noise & interference
  • Polarization distortion
  • Diversity
  • Raleyigh effect
  • Detection of co-channel interference
  • Coverage maps
  • Site acquisition process in RF engineering
  • Cell splitting process
  • Antennas

    Antenna properties, elements and performance characteristics

  • Impedance
  • Radiation
  • Polarization
  • Gain
  • Diversity
  • Antenna noise temperature
  • Dipole definition
  • Bandwidth
  • Radiation patterns
  • Antenna materials
  • Isotropic radiation theory
  • Effect of ground
  • Mutual impedance
  • Angle of incidence
  • Refractive index
  • Azimuth & downtilt

Antenna types

  • Yagi
  • Slot
  • Omnidirectoinal
  • Dipoles & monopoles
  • Microstrip
  • Periodic/Resonant
  • Reflector
  • Loop, Slot, Spiral, Horn
  • Microstrip patch or, patch antenna
  • Half wave dipole
  • Folded dipole
  • Crossed dipole
  • Quadrifilar Helix

Antenna Arrays

  • What is an array
  • How can arrays help in capacity and performance?
  • What are the trade offs of using antenna arrays?
  • Antenna array types
  • Log periodic dipole array
  • Phased array
  • Coliner
  • Yagi-Uda
  • Broadside

Smart Antennas

  • Operation
  • Basic components of
  • What are the trade offs of using smart antennas?
  • Beamforming
  • MIMO
  • Direction of arrival (DOA)
  • Switched beam
  • Adaptive array

FFR modulation technologies

  • Frequency planning
  • Interference matrices
  • Neighbor planning
  • GSM logical channels (BCCH, FCH, SCH, SACCH, TCH, RACH)
  • Cell Tiering
  • Frequency hopping
  • Congestion
  • RF parameter datafills
  • Picocells
  • Femtocells
  • Cell on wheels (COW)
  • In building coverage
  • Towertop Mounted Amplifiers (TMA)
  • GPRS/EGRS Overview & interfaces
  • GPRS attach process
  • PDP context activation process
  • Throughput measurements
  • Impact of retransmissions on throughput
  • LAC/RAC boundaries

CDMA modulation technologies

  • PN planning
  • Soft hand over border planning
  • FER
  • Mobile assisted power control
  • Ec/Io
  • SIR
  • Self generated system interference
  • System parameter optimization
  • Neighbor analysis and search window
  • ERP changes
  • Multicarrier optimization
  • Multiband optimization
  • Reverse link interference
  • Orientation changes
  • 1xRTT/1xEV-DO overview and interfaces
  • Measurement of data throughput
  • Towertop Mounted Amplifiers (TMA)
  • Picocells
  • Femtocells
  • In building coverage
  • RF parameter datafills

RF Optimization Process

  • Setting the optimization criteria
  • Optimization in CDMA networks (incl W-CDMA)
  • Sources of information
  • Parameter investigation
  • Analysis of the existing RF plan
  • Performance of cell site audit
  • Multi carrier and multi mode optimization
  • Post processing and analysis of data
  • Corrective actions

Optimization in fractional frequency reuse networks

  • Sources of information
  • Interference matrices
  • Frequency reuse plan
  • Parameter investigation
  • Analysis of the existing RF plan
  • Cell tiering
  • Performance of cell site audit
  • Post processing and analysis of data
  • Corrective actions

Correlation of customer complaints to possible root cause (RCA)

  • Capacity and loading examples
  • Dropped call, poor coverage
  • Dropped call, system resources
  • Dropped call, other

Mobile drive testing and data collection

  • Tools available
  • Post processing, what does it mean
  • Root cause analysis
  • Tracking and benchmarking
  • PN scanners and their capabilities

Workshop GSM/GPRS

  • Performance analysis
  • Optimization process
  • BCCH parameter optimization
  • Cell selection & reselection
  • Interference analysis
  • GPRS Attach
  • Routing area updates
  • Measuring throughput
  • Root cause analysis (RCA)
  • Final recommendations

Workshop CDMA2000 and 1xEV-DO

  • Performance anlaysis
  • Dropped calls
  • Poor coverage
  • Forward/Reverse link interference
  • Specific neighbor list, search window and congestion
  • Managing excessive soft handoff
  • Multicarrier optimization
  • Intercarrier and intersystem troubleshooting
  • 1xRTT and 1xEV-DO throughput measurement
  • Overview of 1xRTT and 1xEV-DO
  • Optimization principles of 1xRTT data and 1xEV-DO

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