Error Vector Magnitude (EVM)

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Table of contents

1 Background 
2 Introduction 
2.1 Fundamentals of OFDM Transmission
2.1.1 IFFT
2.1.2 Cyclic Prefix Insertion
2.1.3 OFDM Spectrum
2.2 Fundamentals of Frontend Characterization
2.2.1 Emission Power and Spectral Emission
2.2.2 Error Vector Magnitude (EVM)
2.2.3 Guard Interval
2.2.4 Ramp-up and Ramp-down Time
2.2.5 Third Order Intercept Point (IP3)
2.3 Dynamics of the Vehicular Wireless Channel
2.3.1 Path Loss
2.3.2 Fading
3 Wireless LAN According to IEEE 802.11p 
3.1 Definition of Key OFDM Parameters
3.2 Definition of European 5.8GHz Channel Layout
3.2.1 Interference Between ITS and RTTT
3.2.2 Interference Between ITS and FWA
3.2.3 Basic Channel Usage Scenarios
4 Measurements of Transmitter Frontend 
4.1 Siemens WLAN Transceiver (DUT)
4.2 Measurement devices
4.3 Emission Power
4.3.1 Measurement Set-Up
4.3.2 Measurement Results
4.4 Spectral Emission
4.4.1 Measurement Set-Up
4.4.2 Measurement Results
4.5 Error Vector Magnitude
4.6 Guard Intervals
4.6.1 Measurement Set-Up
4.6.2 Measurement Results
4.7 Ramp-Up/Ramp-Down Time
4.7.1 Measurement Set-Up
4.7.2 Measurement Result
5 Summary