| 数字电视测试接收机MER和EVM校准方法研究 |
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| 引用本文： | 刘雷,蒋治国,韩东.数字电视测试接收机MER和EVM校准方法研究[J].电视技术,2021,45(2):13-15. |
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| 作者姓名： | 刘雷 蒋治国 韩东 |
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| 作者单位： | 北京泰瑞特检测技术服务有限责任公司,北京 100015 |
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| 摘 要： | 根据MER和EVM的测量原理,得出MER和EVM与信噪比、IQ幅度不平衡、IQ正交误差之间的关系。此外,提出数字电视测试接收机MER和EVM参数的校准方法,并给出MER和EVM理论值的计算方法。最后,使用R&S公司SFU数字电视测试发射机和ETL数字电视测试接收机对该校准方法进行了验证,验证结果与理论值基本一致,达到了预期效果。
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| 关 键 词： | 数字电视测试接收机 调制误差比 误差矢量幅度 |
Research on Calibration Method of MER and EVM of DTV Test Receiver |
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| LIU Lei,JIANG Zhiguo,HAN Dong.Research on Calibration Method of MER and EVM of DTV Test Receiver[J].Tv Engineering,2021,45(2):13-15. |
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| Authors: | LIU Lei JIANG Zhiguo HAN Dong |
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| Affiliation: | (Beijing TIRT Technology Service Co.,Ltd.,Beijing 100015,China) |
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| Abstract: | According to the measurement principle of Modulation Error Rate(MER)and Error Vector Magnitude(EVM),the relationship between MER,EVM and Signal-Noise Ratio(SNR),IQ amplitude imbalance,IQ quadrature error are obtained.The calibration method of the MER and EVM parameters of the DTV test receiver is proposed,and the calculation method of the theoretical value of MER and EVM is given.The calibration method is verified by the R&S SFU DTV test transmitter and the ETL DTV test receiver.The verification result is basically consistent with the theoretical value,and the expected effect is achieved. |
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| Keywords: | DTV test receiver Modulation Error Rate(MER) Error Vector Magnitude(EVM) |
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