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1、第38卷第4期通信学报Vol.38No.42017年4月JournalonCommunicationsApril2017doi:10.11959/j.issn.1000-436x.2017078星载功率动态分配网络幅相误差校准方法112汤琦，蒋军敏，夏猛（1.西安邮电大学电子工程学院，陕西西安710121；2.西安科技大学通信与信息工程学院，陕西西安710054）摘要：针对移动通信卫星不同波束通信业务量分布不均衡导致下行波束的发射功率差异大问题，给出功率动态分配网络实现结构，该结构根据通信业务量需求自适应分配发射波束功
2、率，同时保证功率放大器的工作点基本一致；针对功率动态分配网络在存在幅相误差时的输出信号互耦，从而导致波束性能急剧下降问题，提出一种功率动态分配网络幅相误差校准方法。该方法利用正交零相关（ZCZ,zero-correlationzone）序列在零相关区间内正交互相关特性实现校准信号间的解耦；零相关区间内具有优异的自相关特性，通过降低校准信号的发射功率，使校准的同时不影响正常通信性能。性能仿真和远场测试结果表明：在校准信号功率比通信信号功率低10dB时，校准后的幅度误差小于0.1dB，相位误差小于0.3°，实测波束主瓣内增
3、益损失小于0.2dB。关键词：卫星通信；功率动态分配；幅相误差校准；ZCZ序列中图分类号：TN957文献标识码：AAmplitudeandphaseerrorscalibrationmethodinsatellite-bornedynamicpowerallocationnetwork112TANGQi,JIANGJun-min,XIAMeng（1.ElectricalEngineeringCollege,Xi’anUniversityofPosts&Telecommunications,Xi’an710121,Chi
4、na;2.CommunicationandInformationEngineeringCollege,Xi’anUniversityofScienceandTechnology,Xi’an710054,China）Abstract:Forthemobilecommunicationsatelliteeachbeamcommunicationtrafficdistributionwasnotbalanced,leadingtodifferencesintransmissionpowerofdownlinkbeam.The
5、implementationarchitecturesofdynamicpowerallocationnetworkwasgiven,whichcouldallocatethetransmittingbeampowerautomaticallyaccordingtothetrafficdemand,atthesametimeensuredthehighefficiencyofpoweramplifier.Becausetheperformanceofdynamicpowerallocationnetworkwassev
6、erelyimpairedbythemutualcouplingamongsignalswhenamplitude/phasemismatchwasexisted,whichledtoasharpdropinbeamperformance.Acalibrationmethodfortheamplitudeandphaseerrorswasproposed.Thedecouplingofcalibrationsignalwasrealizedbyusingthecross-correlationorthogonalcha
7、racteristicoftheorthogonalzero-correlationzone(ZCZ)sequencesinthezerocorrelationinterval,andcommunicationwasfreefromcalibrationbyreducingthetransmitpowerfortheexcellentself-correlationcharacteristicoftheZCZsequences.Performancesimulationandfarfieldtestshowthatun
8、dertheconditionthatthecalibrationsignalpowerislessthanthenormalsignal10dB,theamplitudeerrorislessthan0.1dB,thephaseerrorislessthan0.3°,andthegainlosswithinthemainlobe
