利用双载频方向图相乘的稀疏均匀阵栅瓣抑制方法王旭黄冬平魏国华*白嘉豪朱沁源(北京理工大学信息与电子学院北京100081)摘要：针对稀疏阵列天线间距远大于信号波长导致阵列方向图出现大量栅瓣的问题，该文基于不同载频阵列方向图主瓣与栅瓣相对位置关系存在差异的特性提出一种新型的栅瓣抑制算法。该算法充分利用不同载频回波信息，避免了大规模搜索，有效降低了计算量。首先根据算法原理确定了影响该栅瓣抑制算法性能的因素，然后进一步对影响栅瓣抑制性能的关键参数进行了定量分析，推导得出了栅瓣抑制后峰值旁瓣比(PSLR)与频率差的关系表达式。该表达式为栅瓣抑制快速选择最优频率差提供了理论依据。最后，通过计算机仿真验证了该算法对栅瓣抑制的有效性以及该文所推导的峰值旁瓣比与频率差关系表达式的正确性。关键词：稀疏阵列；栅瓣抑制；方向图相乘中图分类号：TN958文献标识码：A文章编号：1009-5896(2023)02-0534-08DOI:10.11999/JEIT211492SparseUniformArrayGratingLobeSuppressionUsingDual-carrierFrequencyPatternMultiplicationWANGXuHUANGDongpingWEIGuohuaBAIJiahaoZHUQinyuan(SchoolofInformationandElectronics,BeijingInstituteofTechnology,Beijing100081,China)Abstract:Anovelgratinglobesuppressionmethodbasedonthedifferenceintherelativepositionbetweenthemainlobeandgratinglobesofdifferentcarrierfrequencyarraypatterns,isproposedtosolvetheproblemofgratinglobesinthearraypatternduetothesparsearrayantennaspacingbeinglargerthanthesignalwavelength.Thealgorithmmakesuseoftheechoinformationofdifferentcarrierfrequenciesavoidlarge-scalesearchandreduceeffectivelytheamountofcomputation.Firstly,thefactorsaffectingtheperformanceofthealgorithmaredeterminedtheoretically.ThekeyonesarethenquantitativelyanalyzedandtherelationshipexpressionbetweenthePeakSideLobeRatio(PSLR)andfrequencydifferenceisdeduced.Itprovidesatheoreticalbasisforselectingquicklytheoptimalfrequencydifferenceforgratinglobesuppression.Finally,theeffectivenessofthealgorithmforgratinglobesuppressionandthecorrectnessoftheexpressionoftherelationshipbetweenthePSLRandfrequencydifferenceareverifiedbycomputersimulation.Keywords:Sparsearray;Gratinglobesuppression;Patternmultiplication1引言稀疏阵...
