L型阵列天线的测频测角实现研究

Implementation of Frequency and Angle Measurements of L-shaped Array Antenna

基于构建的FPGA协同DSP(FPGA+DSP)异构系统提出了一种L型阵列天线的测频和测角实现方案,研究了谱峰搜索多重信号分类(MUSIC)算法和酉矩阵求根MUSIC算法的实现。2种算法的实测数据试验结果表明,谱峰搜索MUSIC算法实现简单,但处理精度受限于频域和空域的搜索精度。在同一精度量级时,酉矩阵求根MUSIC算法的处理时间只有谱峰搜索MUSIC算法的62.6%,且可以避免多维搜索,还对宽带信号具有一定的分辨率,具有较好的工程鲁棒性。

The implementation scheme of frequency and angle measurements of L-array based on the designed FPGA＋DSP system is studied in this paper. The peak searching MUSIC algorithm and the unitary transformation root MUSIC algorithm are both imple- mented in DSP with real data, and the processing results show that the time of unitary transformation root MUSIC algorithm is faster than that of peak searching MUSIC algorithm by 62.6 % at the same precision level. The unitary transformation root MUSIC algo- rithm can also find the wideband signal in the experimentation, which has better robustness of engineering.