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基于迭代FFT算法的平面稀疏阵列优化方法
曾伟一,梁颖,黄伟
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(成都航空职业技术学院电子工程系，成都 610100;电子科技大学电子工程学院，成都 610054)

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：

基金项目:国家自然科学基金资助项目（60702070）

An optimum method for thinned planar array based on iterative FFT algorithm

ZENG Wei-yi,LIANG Ying,HUANG Wei

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Abstract:

A method based on iterative FFT algorithm is presented for thinned planar array fea turing an optimal peak sidelobe level and the detailed steps of t h e method are provided. The sidelobe level can be reduced when each iteration l oop meeting the given peak sidelobe 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