下行波束形成系统的校正算法及FPGA实现

FPGA realization of downlink digital beam forming calibration

校正系统对于解决数字波束形成天线实现过程中的通道幅相失配等问题具有非常重要的意义。根据一种基于并行正交码的校正算法,采用并行化设计方法,结合先进的FPGA器件,设计了一个下行波束形成天线阵列的校正系统,并给出了该校正系统运行速度和校正效果的分析,证明了该校正系统能完全满足下行波束形成中实时校正的需求。

The calibration system is very important in solving amplitude and phase imbalance of the digital beam forming （DBF） antennas. In this paper, a hardware calibration system based on field programmable gate array （FPGA） was designed. The calibration algorithm adopted in this design was based on the parallel orthogohal codes. To improve the calibration speed, parallel design methods were used. The simulation result shows that this system can satisfy the requirement of real time calibration of downlink digital beam forming.