综测仪测试 NB-IoT-射频指标手册 - 图文(4)

NB-IOT测试文档

禁止商业目的转载 2017.11 Power step ?P [dB] ΔP = 0 ΔP = 2 ΔP = 4 ΔP = 6 NOTE: NPRACH [dB] ±1.5 ±2.0 ±3.5 ±4.0 For extreme conditions an additional ± 2.0 dB relaxation is allowed. 表3.1.7-2 相对功率容差，截取自TS36.521，

Table 6.3.5F.2.3-1: Relative power tolerance for category NB1 NPRACH transmission (normal conditions)

3.1.8频率误差 Frequency Error

频率误差指的是UE的调制载波频率与接收到的基站频率之间的误差，如表3.1.8-1 Carrier frequency [GHz] ≤1 >1 Frequency error [ppm] ±0.2 ±0.1 表3.1.8-1 频率误差

截取自TS36.521，Table 6.5.1F.3-1: Frequency error requirement for UE category NB1

3.1.9 EVM

EVM矢量误差幅度，是指实际测得的发射信号与理想无误的信号的向量误差，包括相位和幅度，参考表3.1.9-1。

Parameter QPSK or BPSK 16QAM Unit % % Average EVM Level 17.5 12.5 Reference Signal EVM Level 17.5 12.5 表3.1.9-1 EVM，截取自TS36.521，Table 6.5.2.1.3-1: Minimum requirements for Error Vector Magnitude

3.1.10载波泄露

载波泄露是指与载波具有相同频率的额外的正弦波，是一种由直流偏置和互调引起的干扰。这种干扰几乎是恒定的，与输入信号幅度无关。测量间隔为一个时隙，协议要求请参考表3.1.10-1 参数 限制值 (dBc) -25 -20 -10 0 dBm ≤ Output power -30 dBm ≤ Output power ≤ 0 dBm -40 dBm ? Output power < -30 dBm 表3.1.10-1 载波泄露

截取自TS36.521，Table 6.5.2.2F.3-1: Minimum requirements for relative carrier leakage power

3.1.11带内辐射 In-band emissions

带内辐射是指UE在所分配的Tone上面的输出功率值与非分配tone上的功率值之比。测量间隔为一个时隙，协议要求参考表3.1.11-1。

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禁止商业目的转载 2017.11 Parameter description General Unit Limit (NOTE 1) Applicable Frequencies Any non-allocated (NOTE 2) Image frequencies (NOTES 2, 3) Carrier frequency (NOTES 4, 5) max??15?10?log10(Ntone/LCtone),dB ?18?5?(?tone?1)/LCtone,?57dBm/(3.75kHzor15kHz)?Ptone?IQ Image dB -25 dBc -20 -10 -25 0 dBm ≤ Output power -30 dBm ≤ Output power ≤ 0 dBm -40 dBm ? Output power < -30 dBm Carrier leakage NOTE 1: An in-band emissions combined limit is evaluated in each non-allocated tone. For each such tone, the minimum requirement is calculated as the higher of Ptone - 30 dB and the power sum of all limit values (General, IQ Image or Carrier leakage) that apply. Ptone is defined in NOTE 10. NOTE 2: The measurement bandwidth is 1 tone and the limit is expressed as a ratio of measured power in one non-allocated tone to the measured average power per allocated tone, where the averaging is done across all allocated tones. NOTE 3: The applicable frequencies for this limit are those that are enclosed in the reflection of the allocated bandwidth, based on symmetry with respect to the centre carrier frequency, but excluding any allocated tones. NOTE 4: The measurement bandwidth is 1 tone and the limit is expressed as a ratio of measured power in one non-allocated tone to the measured total power in all allocated tones. NOTE 5: The applicable frequencies for this limit are those that are enclosed in the tones containing the DC frequency if Ntone is odd, or in the two tones immediately adjacent to the DC frequency if Ntone is even, but excluding any allocated tone. NOTE 6: NOTE 7: NOTE 8: LCtone is the Transmission Bandwidth (tones). Ntone is the Transmission Bandwidth Configuration (tones). ?tone is the starting frequency offset between the allocated tone and the measured non-allocated tone. (e.g. ?tone?1 or ?tone??1 for the first adjacent tone outside of the allocated bandwidth. NOTE 9: Ptone is the transmitted power per 3.75 kHz or 15 kHz in allocated tones, measured in dBm. 表3.1.11-1 带内辐射，截取自TS36.521，Table 6.5.2.3F.3-1: Minimum requirements for in-band emissions

3.1.12占用带宽 OBW

占用带宽是指以指定信道的中心频率为中心，包含发射功率99%能量所对应的频带宽度，协议要求参考表3.1.12-1。

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NB-IOT测试文档

禁止商业目的转载 2017.11 Initial Conditions Test Environment as specified in TS 36.508[7] subclause 8.1.1 Normal Test Frequencies as specified in TS 36.508 [7] subclause 8.1.3.1 Frequency ranges defined in Annex K.1.1 Test Parameters Configuration ID 1 2 3 (Note 1) Downlink Configuration N/A Modulation QPSK QPSK QPSK Uplink Configuration Ntones 1@0 1@0 12@0 Sub-carrier spacing (kHz) 3.75kHz 15kHz 15kHz Note 1: Applicable to UE supporting UL multi-tone transmissions 表3.1.12-1 占用带宽，截取自TS36.521，Table 6.6.1F.4.1-1: Test Configuration Table

3.1.13射频辐射模板 SEM

射频辐射模板指的是从NB-iot UE信道带宽边沿处到距离此边沿△fOOB，这段频率区间内的辐射需要服从的指标规范，请参考表3.1.13-1。

ΔfOOB (kHz) ? 0 ? 100 ? 150 ? 300 ? 500-1700 Emission limit (dBm) 26 -5 -8 -29 -35 Measurement bandwidth 30 kHz 30 kHz 30 kHz 30 kHz 30 kHz 表3.1.13 射频辐射模板，截取自TS36.521，Table 6.6.2.1F.3-1: category NB1 UE spectrum emission mask

3.1.14邻信道泄漏比 ACLR

邻信道泄漏比是指该信道的发射功率与泄漏到相邻信道的辐射功率的比值，如果测得邻信道上单功率大于-50dBm，则NB-iot UE的ACLR值应高于表3.1.14-1中的数值。 ACLR Adjacent channel centre frequency offset from category NB1 Channel edge Adjacent channel measurement bandwidth Measurement filter Category NB1 channel measurement bandwidth Category NB1 channel Measurement filter GSMACLR 20 dB ±200 kHz 180 kHz Rectangular 180 kHz Rectangular UTRAACLR 37 dB ±2.5 MHz 3.84 MHz RRC-filter α=0.22 180 kHz Rectangular 表3.1.14 邻信道泄漏比，截取自TS36.521 Table 6.6.2.3F-1: category NB1 UE ACLR requirements

3.1.15发射机杂散

发射机指的是无用信号产生的辐射，如谐波辐射、寄生辐射、交调分量及其他频率变换分量。

对于NB-iot UE，fOOB等于1.7MHz

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禁止商业目的转载 2017.11

3.1.16发射机互调

发射机互调特性是指有用信号和通过天线进入发射机的干扰信号共存时，发射机对所产生的互调信 …… 此处隐藏：3215字，全部文档内容请下载后查看。喜欢就下载吧 ……