摘要: |
提出了一种基于迭代FFT算法的优化方法来实现平面稀疏阵列的峰值旁瓣电平优化
,并给出了详细的优化步骤。在给定的旁瓣约束条件下,利用阵列因子与阵元激励之间存在
的傅里叶变换关系,对不同的初始随机阵元激励分别进行迭代循环,就可以降低稀疏阵列的
旁瓣电平。在迭代过程中,根据稀疏率将阵元激励按幅度大小置1置0来完成阵列稀疏。仿真
实验证明了该方法的高效性和稳健性。 |
关键词: 阵列天线 平面阵列 快速傅里叶变换 旁瓣约束 |
DOI: |
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基金项目:国家自然科学基金资助项目(60702070) |
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An optimum method for thinned planar array based on iterative FFT algorithm |
ZENG Wei-yi,LIANG Ying,HUANG Wei |
() |
Abstract: |
A method based on iterative FFT algorithm is presented for thinned planar array
fea
turing an optimal peak sidelobe level and the detailed steps of t
h
e method are provided. The sidelobe level can be reduced when each iteration
l
oop meeting the given peak sidelobe requirement starts with a different random
initialization of element excitations by using the Fourier transform relationshi
p between the array factor and the element excitations. Array thinning is
accomplished by setting the amplitudes of the largest element excitations to un
ity and the others to zero during each iteration cycle.The simulated r
esults confirm the great efficiency and the robustness of the new method. |
Key words: array antennas planar array fast Fourier transform (FFT) side lobe constraint |