CAJ | 학술논문

传统的二维实阵列用于三维微波成像时，需要相对较高的脉冲重复频率才能切换发射阵元。针对这种情况，利用随机阵列来实现三维成像，目的是有效降低脉冲重复频率。进一步提出利用等效相位中心原理来实现任意随机阵列布局的可行性方案。然后，基于随机阵列，发现使用非均匀快速傅里叶变换（nonuniform fast Fourier transform，NUFFT）来实现后向投影（back projection，BP）算法的插值过程，能够用较少的运算量实现 BP算法的高精度插值。最后，结合并行处理技术来实现 NUFFT BP 算法，结果使得 BP 算法的执行效率得到显著提高。
전통적이유실진렬용우삼유미파성상시，수요상대교고적맥충중복빈솔재능절환발사진원。침대저충정황，이용수궤진렬래실현삼유성상，목적시유효강저맥충중복빈솔。진일보제출이용등효상위중심원리래실현임의수궤진렬포국적가행성방안。연후，기우수궤진렬，발현사용비균균쾌속부리협변환（nonuniform fast Fourier transform，NUFFT）래실현후향투영（back projection，BP）산법적삽치과정，능구용교소적운산량실현 BP산법적고정도삽치。최후，결합병행처리기술래실현 NUFFT BP 산법，결과사득 BP 산법적집행효솔득도현저제고。
Traditional two dimensional (2D)antenna array requires high pulse repetition frequency (PRF) to switch transmitters,when it is applied to 3D microwave imaging.Therefore,3D imaging is gotten by the random antenna array,as a result it reduces the requirement for PRF.Besides,a reasonable plan based on the phase center approximation (PCA)is proposed to implement the random antenna array of arbitrary geometry. The back projection (BP)algorithm interpolated by the nonuniform fast Fourier transform (NUFFT)is called NUFFT BP,and achieves high precision interpolation with relatively less computational complexity.Moreover, the NUFFT BP is further accelerated by the compute unified device architecture (CUDA)parallel computing technology,named CUDA NUFFT BP.It significantly improves the execution efficiency of the BP algorithm.