有效的网站建设,网站容易被百度收录,灵犀科技网站建设,wordpress3.9下载6.2 Base station output power 用于测量载波发射功率的大小#xff0c;功率越大小区半径越大但是杂散也会越大
载波功率#xff08;用频谱仪测#xff09;天线口功率#xff08;用功率计测#xff09;载波功率是以RBW为单位的filter测量的积分功率不同带宽的多载波测试时…6.2 Base station output power 用于测量载波发射功率的大小功率越大小区半径越大但是杂散也会越大
载波功率用频谱仪测天线口功率用功率计测载波功率是以RBW为单位的filter测量的积分功率不同带宽的多载波测试时分为同样的功率谱密度或者每个再多带宽平衡 6.3.2 RE power control dynamic range
用于测量功率在最大和最小REresource element的信号质量check EVM的结果
最小setup TM2/最大TM1.1/TM3.1的平均值遍历每种调制方式因为在测试EVM时最cover到RE的结果所以一般情况下不会单独测试这个case。
6.3 Output power dynamics
the difference between the maximumTM3.1满PRB and the minimum transmit powerTM2只有一个PRBRE的资源快众坐标是频域 以subcarrier为单位一个PRB有12个subcarrier横坐标以时间symbol为单位
带宽越大RE数量越多所以要求不一样以100M有273个PRB为例10*Log27324.36dB
Table 6.3.3.2-1: Total power dynamic range BS channel Total power dynamic range (dB) bandwidth (MHz) 15 kHz SCS 30 kHz SCS 60 kHz SCS 20 20.2 17 13.8 50 24.3 21.2 18.1 100 N/A 24.3 21.3 6.4 Transmit ON/OFF power(只有TDD 模式需要测试)
在TX/RX 切换时测量PA开和关的功率差测试PA开关和关开所花的时间5G要求10usà 因为3GPP规定了UL要提前DL 13us开始LTE的要求上行提前下行20us所以这个case要求达到17us这个测试对测试仪表要求较高keysight两次测量开功率和关功率和罗德一次性测试所以对测试环境和仪表的动态范围要求较高 Transition Transient period length (µs) OFF to ON 10 ON to OFF 10 6.5 Transmitted signal quality
典型的信号质量case需要测试不同的调制方式和不同的功率 Modulation scheme for PDSCH Required EVM QPSK 17.5 % 16QAM 12.5 % 64QAM 8 % 256QAM 3.5 % 1024QAM 2.5 %1 2.8 %2 Note1: This requirement is applicable for frequencies equal to or below 4.2 GHz. Note 2: This requirement is applicable for frequencies above 4.2 GHz.
6.5.3 Time alignment error
This requirement shall apply to frame timing in MIMO transmission, carrier aggregation and their combinations.
For MIMO transmission, at each carrier frequency, TAE shall not exceed 65 ns.
For intra-band contiguous carrier aggregation, with or without MIMO, TAE shall not exceed 260ns.
For intra-band non-contiguous carrier aggregation, with or without MIMO, TAE shall not exceed 3µs.
For inter-band carrier aggregation, with or without MIMO, TAE shall not exceed 3µs.
The time alignment error requirements for NB-IoT are specified in TS 36.104 [13] clause 6.5.3. 为了保证各个天线之间的timing offsetRRU的delay测试是保证这个case的前提测试方法分 为合路所以测试天线但信号是mimo信号连接到频谱仪直接解调单个天线分别解调那么测试信号就可以用普通Test mode信号
6.6 Unwanted emissions不想要的杂散信号就是那些会干扰别的设备的信号测量
6.6.2 Occupied bandwidth
测量占用的带宽不能太大超出定义带宽99%的能量所占用的带宽仪表从中心频点开始计算直到功率达到99%之后得到带宽大小
6.6.3 Adjacent Channel Leakage Power Ratio (ACLR)
测量有多少能量泄露到了相邻或者次邻道的信号可能对别的小区的干扰载波功率-邻道功率积分功率更具带宽基站类型要求不一样当两个载波不相邻时需要考虑两个载波之间累积的泄露功率CACLRDPD 就是为了控制载波以为的功率所以DPD飞了就是说的ACLR的翅膀变高了
Table 6.6.3.5.2-1: Base station ACLR limit BS channel bandwidth of lowest/highest NR carrier transmitted BWChannel (MHz) BS adjacent channel centre frequency offset below the lowest or above the highest carrier centre frequency transmitted Assumed adjacent channel carrier (informative) Filter on the adjacent channel frequency and corresponding filter bandwidth ACLR limit 5, 10, 15, 20 BWChannel NR of same BW (Note 2) Square (BWConfig) 44.2 dB 2 x BWChannel NR of same BW (Note 2) Square (BWConfig) 44.2 dB BWChannel /2 2.5 MHz 5 MHz E-UTRA Square (4.5 MHz) 44.2 dB (NOTE 3) BWChannel /2 7.5 MHz 5 MHz E-UTRA Square (4.5 MHz) 44.2 dB (NOTE 3) 25, 30, 40, 50, 60, 70, 80, 90, 100 BWChannel NR of same BW (Note 2) Square (BWConfig) 43.8 dB 2 x BWChannel NR of same BW (Note 2) Square (BWConfig) 43.8 dB BWChannel /2 2.5 MHz 5 MHz E-UTRA Square (4.5 MHz) 43.8 dB (NOTE 3) BWChannel /2 7.5 MHz 5 MHz E-UTRA Square (4.5 MHz) 43.8 dB (NOTE 3) NOTE 1: BWChannel and BWConfig are the BS channel bandwidth and transmission bandwidth configuration of the lowest/highest NR carrier transmitted on the assigned channel frequency. NOTE 2: With SCS that provides largest transmission bandwidth configuration (BWConfig). NOTE 3: The requirements are applicable when the band is also defined for E-UTRA or UTRA. The ACLR absolute basic limit is specified in table 6.6.3.5.22.
Table 6.6.3.5.2-2: Base station ACLR absolute basic limit BS category / BS class ACLR absolute basic limit Category A Wide Area BS -13 dBm/MHz Category B Wide Area BS -15 dBm/MHz Medium Range BS -25 dBm/MHz Local Area BS -32 dBm/MHz 6.6.4 Operating band unwanted emissionsOBUE
测量的目的和ACLR一样但是OBUE不是测的积分功率它在要求特定的RBW下测试功率泄露的burst所以RBW一般都很小例如100Khz Table 6.6.4.5.2-3: Wide Area BS operating band unwanted emission limits (NR bands 3GHz) for Category A Frequency offset of measurement filter 3dB point, Df Frequency offset of measurement filter centre frequency, f_offset Basic limit (Note 1, 2) Measurement bandwidth 0 MHz £ Df 5 MHz 0.05 MHz £ f_offset 5.05 MHz 100 kHz 5 MHz £ Df min(10 MHz, Dfmax) 5.05 MHz £ f_offset min(10.05 MHz, f_offsetmax) -12.2 dBm 100 kHz 10 MHz £ Df £ Dfmax 10.5 MHz £ f_offset f_offsetmax -13 dBm (Note 3) 1MHz NOTE 1: For a BS supporting non-contiguous spectrum operation within any operating band, the emission limits within sub-block gaps is calculated as a cumulative sum of contributions from adjacent sub blocks on each side of the sub block gap, where the contribution from the far-end sub-block shall be scaled according to the measurement bandwidth of the near-end sub-block. Exception is Df ≥ 10MHz from both adjacent sub blocks on each side of the sub-block gap, where the emission limits within sub-block gaps shall be 13 dBm/1 MHz. NOTE 2: For a multi-band connector with Inter RF Bandwidth gap 2*ΔfOBUE the emission limits within the Inter RF Bandwidth gaps is calculated as a cumulative sum of contributions from adjacent sub-blocks or RF Bandwidth on each side of the Inter RF Bandwidth gap, where the contribution from the far-end sub-block or RF Bandwidth shall be scaled according to the measurement bandwidth of the near-end sub-block or RF Bandwidth. NOTE 3: The requirement is not applicable when Dfmax 10 MHz. 6.6.5 Transmitter spurious emissions(杂散)
杂散测试同样也是测试泄露到载波以外的能量和ACLR、OBUE的不同之处在于
ACLR 测试到了相邻和次相邻信道并且是积分功率OBUE测试频带相对于载波的频率也是接近的一般在几十M或者一两百M以内和杂散一样也指定RBW不是积分功率杂散需要测试全频带的功率泄露一般至少要求到5倍的谐波频带以内
最基本的要求
Table 6.6.5.5.1.1-2: General BS transmitter spurious emission limits in FR1, Category B Spurious frequency range Basic limit Measurement bandwidth Notes 9 kHz – 150 kHz 1 kHz Note 1, Note 4 150 kHz – 30 MHz -36 dBm 10 kHz Note 1, Note 4 30 MHz – 1 GHz 100 kHz Note 1 1 GHz – 12.75 GHz -30 dBm 1 MHz Note 1, Note 2 12.75 GHz – 5th harmonic of the upper frequency edge of the DL operating band in GHz 1 MHz Note 1, Note 2, Note 3 6.6.5.5.1.2 Protection of the BS receiver of own or different BS
对于FDD模式下测试对自己接收频段的保护能力
Table 6.6.5.5.1.2-1: BS spurious emissions basic limits for protection of the BS receiver BS class Frequency range Basic limit Measurement bandwidth Wide Area BS -96 dBm Medium Range BS FUL_low – FUL_high -91 dBm 100 kHz Local Area BS -88 dBm co-existence with systems operating in other frequency bands System type for NR to co-exist with Frequency range for co-existence requirement Basic limit Measurement bandwidth GSM900 921 – 960 MHz -57 dBm 100 kHz 876 – 915 MHz -61 dBm 100 kHz DCS1800 1805 – 1880 MHz -47 dBm 100 kHz 1710 – 1785 MHz -61 dBm 100 kHz PCS1900 1930 – 1990 MHz -47 dBm 100 kHz 1850 – 1910 MHz -61 dBm 100 kHz GSM850 or CDMA850 869 – 894 MHz -57 dBm 100 kHz 824 – 849 MHz -61 dBm 100 kHz UTRA FDD Band I or 2110 – 2170 MHz -52 dBm 1 MHz E-UTRA Band 1 or NR Band n1 1920 – 1980 MHz -49 dBm 1 MHz 6.6.5.5.1.4 Co-location with other base stations
These requirements may be applied for the protection of other BS receivers co-located with a BS.
The requirements assume a 30 dB coupling loss between transmitter and receiver and are based on co-location with base stations of the same class. Type of co-located BS Frequency range for Basic limit Measurement Note co-location requirement WA BS MR BS LA BS bandwidth GSM900 876-915 MHz -98 dBm -91 dBm -70 dBm 100 kHz DCS1800 1710 – 1785 MHz -98 dBm -91 dBm -80 dBm 100 kHz PCS1900 1850 – 1910 MHz -98 dBm -91 dBm -80 dBm 100 kHz GSM850 or CDMA850 824 – 849 MHz -98 dBm -91 dBm -70 dBm 100 kHz UTRA FDD Band I or E-UTRA Band 1 or NR Band n1 1920 – 1980 MHz -96 dBm -91 dBm -88 dBm 100 kHz 6.7 Transmitter intermodulation
互调测试模拟基站附近有个其他的基站或设备辐射出大功率而待测的基站由于天线、天线接头、滤波器、低噪放、滤波器等器件的非线性生成了新的杂散信号那么我们就需要测试生成的杂散信号是否满足上面unwanted emission的要求ACLR/OBUE/SE categoryB/co-existing/co-location所有要求TDD 模式需要在DL时隙测试测试环境的搭建要求较高 5G_射频测试_接收机测量五-CSDN博客
