CAJ | 학술논문

提出了一种新的适用于高分辨率宽测绘带的chirp scaling （CS ）成像算法。该算法通过引入切比雪夫多项式插值代替了传统CS算法中的泰勒级数展开，得到了新的二维频谱信号的近似，并在此基础上推导出了完整的成像流程。详细分析了切比雪夫多项式插值得到的二维频谱近似和传统形式的区别，比较了两者在相同展开阶次下的残余误差大小和空变性，并分析了新的二维频谱近似带来的成像质量和距离向分块数方面的性能差异。分析表明该算法具有精度高、误差小、误差空变性弱等特点，能提升成像质量同时减少距离向分块数，适用于高分辨率宽测绘带应用场景。最后，通过仿真实验结果验证了算法的有效性。
제출료일충신적괄용우고분변솔관측회대적chirp scaling （CS ）성상산법。해산법통과인입절비설부다항식삽치대체료전통CS산법중적태륵급수전개，득도료신적이유빈보신호적근사，병재차기출상추도출료완정적성상류정。상세분석료절비설부다항식삽치득도적이유빈보근사화전통형식적구별，비교료량자재상동전개계차하적잔여오차대소화공변성，병분석료신적이유빈보근사대래적성상질량화거리향분괴수방면적성능차이。분석표명해산법구유정도고、오차소、오차공변성약등특점，능제승성상질량동시감소거리향분괴수，괄용우고분변솔관측회대응용장경。최후，통과방진실험결과험증료산법적유효성。
In this paper ,a new chirp scaling(CS) algorithm based on Chebyshev polynomials is proposed .The new algo‐rithm uses Chebyshev polynomials interpolation instead of the Taylor series expansion to gain a new expression of the 2‐D spectrum ,based on which the complete imaging process is developed .This paper analyzes the residual error of the new algorithm and the traditional one ,compares the value and spatial variance and discusses the difference in imaging quality and range segmentation .Theoretical analysis shows that the new algorithm possesses high accuracy and less spatial vari‐ant error w hich results in the improvement of imaging and reduction of range segmentation .In the end ,computer simula‐tions confirm the validity of the algorithm .