| 摘要: |
| 为了校准相控阵天线通道间幅相误差，实现精确的数字波束形成，给出了一种用伪噪声序列（PN）码作为校准测试信号的在线校准方法（校准和通信可同时进行）。该方法由特定的校准站发送校准测试信号，被天线各阵元接收，并通过存在误差的各通道，在接收端用与发端相同的PN码作为本地信号与接收信号逐通道做相关运算，对各通道的相关峰值做比较可求出校准矢量进而完成校准。仿真结果表明，该方法可以有效校准相控阵天线通道间的幅相误差，校准后的波束方向图接近理想的波束方向图。 |
| 关键词: 相控阵天线 数字波束形成 幅相误差 PN码 在线校准 |
| DOI： |
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| 基金项目:国家高技术研究发展计划（863计划）项目（2012AA01A503） |
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| A new method of calibrating phased array antenna using PN sequence |
| HAN Xiao-juan,HE Bing-zhe,LOU Da-nian,ZHANG Ning |
| () |
| Abstract: |
| In order to calibrate the amplitude-phase error of phased array antenna and achieve more accurate performance of digital beamforming, this paper provides a calibration method based on the pseudorandom（PN） sequence. In this method, pseudorandom sequence is used as the calibration test signal and the calibration can be proceeded at the same time as communication. The PN sequence is sent by a calibration station and received by the antenna, and passes the channals in which amplitude-phase error exists. At the receiving terminal, the local codes correlate with the received signal and calculate the calibration vector. The simulation results show that this method can calibrate the amplitude-phase error of phased array antenna. |
| Key words: phased array antenna digital beamforming amplitude-phase error pseudorandom sequence online calibration |
