"EVM", which represents the performance indicators of communication standards, explains the knowledge necessary for system design

資料の紹介

　EVM (EVM (Error Vector Magnitude), error vector amplitude) used as a system -level performance index in many communication standards such as 4G (LTE) and 5G.Its value is a quantification of the ideal signal and the gap between the measured signals.By using EVM, the comprehensive impact caused by the potential problems of the system can be quantified and expressed.

　The latest communication standard stipulates acceptable EVM values based on the characteristics of transmission and receiving signals such as data rates and bandwidth.It is also incorporated into test / measurement devices used to verify communication standards, and provides an environment that can fully meet the standard by adopting a strict value that exceeds these regulations.ing.

　In this document, we will explain how the wireless communication -related performance indicators are represented by EVM and what the effects are.Based on the example, we will also explain how to optimize system -level performance using EVM.It also introduces how to achieve up to 15 dB excellent EVM performance than the target values set in most communication standards.

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