摘要
针对天线阵对多通道幅度和相位一致性的要求,在基于软件无线电(Software Defined Radio,SDR)架构的智能天线基础上提出了射频通道幅相测算和板级幅相测算相结合方案,具备幅相慢变特性的射频通道采用离线参数法,而板上多通道采用在线测算法,并采用星座旋转算法实现了相位校准。最后通过现场可编程门阵列(Field Programmable Gate Array,FPGA)模块仿真验证了该校准方法的正确性,并分析了系统误差来源及规避方法,为多通道系统幅相校准提供了工程化应用基础。
According to the consistency requirement of multi-channel amplitude and phase on the antenna array,based on a software defined radio(SDR)architecture-based smart antenna,a combination scheme of radio frequency(RF)channel amplitude and phase measurement and board-level amplitude and phase measurement is proposed.Phase-varying RF channels use an offline parameter method,while board-level multi-channel adopts an online measurement algorithm.Constellation rotation algorithm is used to achieve phase calibration.Finally,the correctness of the calibration method is verified by designing and simulating field programmable gate array(FPGA)module,and the source of the system error and the evasion method are analyzed,which provides an engineering application basis for multi-channel system amplitude and phase calibration.
作者
杨贺
孙杰
YANG He;SUN Jie(Tianjin Aerospace Zhongwei Data System Technology Co.,Ltd.,Tianjin 300458,China)
出处
《电讯技术》
北大核心
2021年第9期1165-1169,共5页
Telecommunication Engineering
关键词
软件无线电
智能天线
幅相不一致
相位校准
星座旋转
software defined radio
smart antenna
inconsistency of amplitude and phase
phase calibration
constellation rotation
