GNR射频指标发射部分释义(2)
2023-04-08 来源:文库网
发射关功率表
6.3.3 Transmit ON/OFF time mask发射功率开关模板
6.3.3.2 General ON/OFF time mask通用开关模板
on/off时间模板
Figure 6.3.3.2-1: General ON/OFF time mask for NR UL transmission in FR1
10us内完成功率10%-90%和90%-10% 的上升和下降过程
6.4 Transmit signal quality发射信号质量
6.4.1 Frequency error频率误差
要求的频率误差是载波频率±0.1PPM 15Hz，测试周期1ms
6.4.2 Transmit modulation quality发射信号调制质量
6.4.2.1 Error Vector Magnitude矢量误差幅度
EVM的定义
不同调制方式下的EVM要求不同，原则是调制阶数MCS越高，要求也相应的越高。
不同MCS下EVM要求
对非256QAM的调制方式来说，测试功率只要求比最小发射功率高即可，而256QAM的测试要求功率比最小功率高10dB以上。也就是说并不需要在最大功率下测试EVM，大多数场景下只需要比最小功率大即可，但我们测试往往是设置的最大功率，这样的场景最恶劣，也最容易发现问题。
EVM测试的功率要求
6.4.2.2 Carrier leakage载波泄露
Carrier leakage is an additive sinusoid waveform whose frequency is the same as the modulated waveform carrier frequency. The measurement interval is one slot in the time domain.In the case that uplink sharing, the carrier leakage may have 7.5 kHz shift with the carrier frequency.The relative carrier leakage power is a power ratio of the additive sinusoid waveform and the modulated waveform. The relative carrier leakage power shall not exceed the values specified in Table 6.4.2.2-1.
载波泄露是一种由于串扰或者直流偏移造成的干扰，表现为未经调制的载波频率上的正弦波。这是一种幅度恒定且与信号幅度相对立的干扰。信号的IQ分量会对中心的子载波造成干扰，尤其是输出的调制信号较小的时候影响更大，本测试项以载波泄露的形式测试UE发射机的调试质量。
载波泄露表
6.4.2.3 In-band emissions带内杂散
The in-band emission is defined as the average emission across 12 sub-carriers and as a function of the RB offset from the edge of the allocated UL transmission bandwidth. The in-band emission is measured as the ratio of the UE output power in a non–allocated RB to the UE output power in an allocated RB.
The basic in-band emissions measurement interval is defined over one slot in the time domain; however, the minimum requirement applies when the in-band emission measurement is averaged over 10 sub-frames. When the PUSCH or PUCCH transmission slot is shortened due to multiplexing with SRS, the in-band emissions measurement interval is reduced by one or more symbols, accordingly.
6.3.3 Transmit ON/OFF time mask发射功率开关模板
6.3.3.2 General ON/OFF time mask通用开关模板
on/off时间模板
Figure 6.3.3.2-1: General ON/OFF time mask for NR UL transmission in FR1
10us内完成功率10%-90%和90%-10% 的上升和下降过程
6.4 Transmit signal quality发射信号质量
6.4.1 Frequency error频率误差
要求的频率误差是载波频率±0.1PPM 15Hz，测试周期1ms
6.4.2 Transmit modulation quality发射信号调制质量
6.4.2.1 Error Vector Magnitude矢量误差幅度
EVM的定义
不同调制方式下的EVM要求不同，原则是调制阶数MCS越高，要求也相应的越高。
不同MCS下EVM要求
对非256QAM的调制方式来说，测试功率只要求比最小发射功率高即可，而256QAM的测试要求功率比最小功率高10dB以上。也就是说并不需要在最大功率下测试EVM，大多数场景下只需要比最小功率大即可，但我们测试往往是设置的最大功率，这样的场景最恶劣，也最容易发现问题。
EVM测试的功率要求
6.4.2.2 Carrier leakage载波泄露
Carrier leakage is an additive sinusoid waveform whose frequency is the same as the modulated waveform carrier frequency. The measurement interval is one slot in the time domain.In the case that uplink sharing, the carrier leakage may have 7.5 kHz shift with the carrier frequency.The relative carrier leakage power is a power ratio of the additive sinusoid waveform and the modulated waveform. The relative carrier leakage power shall not exceed the values specified in Table 6.4.2.2-1.
载波泄露是一种由于串扰或者直流偏移造成的干扰，表现为未经调制的载波频率上的正弦波。这是一种幅度恒定且与信号幅度相对立的干扰。信号的IQ分量会对中心的子载波造成干扰，尤其是输出的调制信号较小的时候影响更大，本测试项以载波泄露的形式测试UE发射机的调试质量。
载波泄露表
6.4.2.3 In-band emissions带内杂散
The in-band emission is defined as the average emission across 12 sub-carriers and as a function of the RB offset from the edge of the allocated UL transmission bandwidth. The in-band emission is measured as the ratio of the UE output power in a non–allocated RB to the UE output power in an allocated RB.
The basic in-band emissions measurement interval is defined over one slot in the time domain; however, the minimum requirement applies when the in-band emission measurement is averaged over 10 sub-frames. When the PUSCH or PUCCH transmission slot is shortened due to multiplexing with SRS, the in-band emissions measurement interval is reduced by one or more symbols, accordingly.
