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Electromagnetic calculation and SAR echo simulation algorithm play an important role in radar system design, radar algorithm verification, and automatic target recognition algorithms research. To solve the problem of traditional electromagnetic calculation and SAR echo simulation algorithm being too time-consuming, an acceleration method for the entire process based on GPU is proposed. Firstly, the three core computing parts of the traditional algorithmray tracing, electromagnetic calculation,and SAR echo simulation are divided into multiple threads. Then, by using the GPU general computing platform, all thread units are processed in parallel to accelerate the simulation speed. Finally, the experimental results show that the acceleration ratio of this method is about 450 compared with singlecore CPU and about 50 compared to a 10-core CPU. This method achieves a good acceleration effect on the premise that the generated data is consistent with the traditional algorithm.
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电磁计算与SAR(Synthetic aperture Radar,合成孔径雷达)回波仿真算法在雷达系统设计、雷达算法验证与目标自动识别算法研究等方面起着重要的作用,针对传统的电磁计算与SAR回波仿真算法耗时过长的问题,本文提出了一种基于GPU(Graphic Processing Unit,图形处理器)的电磁计算与SAR回波仿真全流程加速方法。首先,将传统算法中的三个核心计算部分——射线跟踪、电磁计算与SAR回波仿真进行多线程划分,然后利用GPU通用计算平台,并行处理所有线程单元,加快仿真速度。最后,实验结果表明:该方法相对于单核CPU计算的加速比达到450左右,相对于10核心CPU计算的加速比达到50左右。该方法在保证生成数据与传统算法一致的前提下,实现了良好的加速效果。
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吴雪 2000年生,硕士研究生。
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吴雪 2000年生,硕士研究生。
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夏伟杰 1979年生,博士,教授,博士生导师。
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夏伟杰 1979年生,博士,教授,博士生导师。
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蔡炜锋 1999年生,硕士研究生。
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蔡炜锋 1999年生,硕士研究生。
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2021., articleTitle=MOC全堆芯中子输运CPU/GPU异构并行算法研究, refAbstract=null)], funds=[Fund(id=1241757982225133845, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, awardId=1004-KFA21530, language=CN, fundingSource=航天科技集团第一研究院复杂电磁环境下海面舰船回波仿真(1004-KFA21530), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1241757975971427321, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, xref=null, ext=[AuthorCompanyExt(id=1241757975979815931, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, companyId=1241757975971427321, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=College of Electronic Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China), AuthorCompanyExt(id=1241757975984010235, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, companyId=1241757975971427321, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=南京航空航天大学电子信息工程学院 南京 210016)])], figs=[ArticleFig(id=1241757977925972072, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Fig. 1, caption=
The whole process of traditional SAR echo simulation, figureFileSmall=Pez1RKR64wIMFlFESPi3aA==, figureFileBig=HxtVsh4nsDATl2xIlCao/Q==, tableContent=null), ArticleFig(id=1241757978026635376, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=图1, caption=
传统的SAR回波仿真全流程, figureFileSmall=Pez1RKR64wIMFlFESPi3aA==, figureFileBig=HxtVsh4nsDATl2xIlCao/Q==, tableContent=null), ArticleFig(id=1241757978232156284, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Fig. 2, caption=
Hierarchy of CUDA threads, figureFileSmall=fMLoH0us2HLNpcTTN6KTMg==, figureFileBig=wnE8o6zZVat6nABTATuttg==, tableContent=null), ArticleFig(id=1241757978299265152, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=图2, caption=
CUDA线程层次结构, figureFileSmall=fMLoH0us2HLNpcTTN6KTMg==, figureFileBig=wnE8o6zZVat6nABTATuttg==, tableContent=null), ArticleFig(id=1241757978378956931, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Fig. 3, caption=
Flowchart of the overall algorithm, figureFileSmall=UsrjdBieGxTMH+J0xOdtjw==, figureFileBig=L3zT23awmD0jID7FQJSPkw==, tableContent=null), ArticleFig(id=1241757978542534794, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=图3, caption=
算法整体流程图, figureFileSmall=UsrjdBieGxTMH+J0xOdtjw==, figureFileBig=L3zT23awmD0jID7FQJSPkw==, tableContent=null), ArticleFig(id=1241757978626420879, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Fig. 4, caption=
Ray tracing paths in a plane model, figureFileSmall=QPFQCPCZViqerGT/7gt7PQ==, figureFileBig=AzjKyD7MUvN3uZxeK/t6Ag==, tableContent=null), ArticleFig(id=1241757978764832920, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=图4, caption=
平面模型中的射线追踪路径, figureFileSmall=QPFQCPCZViqerGT/7gt7PQ==, figureFileBig=AzjKyD7MUvN3uZxeK/t6Ag==, tableContent=null), ArticleFig(id=1241757980325114017, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Fig. 5, caption=
Ray tracing diagram, figureFileSmall=fndIfjI8TRBjZYcKHmiPlw==, figureFileBig=6xpNFjY4X8lhYyDSzon5Tg==, tableContent=null), ArticleFig(id=1241757980455137450, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=图5, caption=
射线跟踪示意图, figureFileSmall=fndIfjI8TRBjZYcKHmiPlw==, figureFileBig=6xpNFjY4X8lhYyDSzon5Tg==, tableContent=null), ArticleFig(id=1241757980564189362, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Fig. 6, caption=
Schematic diagram of electromagnetic scattering matrix, figureFileSmall=9OeBa/QaoVxfGQRkjrs1Hw==, figureFileBig=f47QbjzmVfOzdCIKKXSF6Q==, tableContent=null), ArticleFig(id=1241757980702601404, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=图6, caption=
电磁散射矩阵示意图, figureFileSmall=9OeBa/QaoVxfGQRkjrs1Hw==, figureFileBig=f47QbjzmVfOzdCIKKXSF6Q==, tableContent=null), ArticleFig(id=1241757980824236227, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Fig. 7, caption=
The geometry of SAR time domain echo simulation, figureFileSmall=0qdlYXUAZYhHAwAjPy+j8g==, figureFileBig=5cqiinA13BUacIhpam5Elg==, tableContent=null), ArticleFig(id=1241757980941676745, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=图7, caption=
SAR时域回波仿真几何图, figureFileSmall=0qdlYXUAZYhHAwAjPy+j8g==, figureFileBig=5cqiinA13BUacIhpam5Elg==, tableContent=null), ArticleFig(id=1241757981033951439, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Fig. 8, caption=
Time domain echo diagram of a single scattering element, figureFileSmall=jvZaADIQvXkCNuq5TWMFbg==, figureFileBig=ol1pXhndLxGhGnxmYrXWzA==, tableContent=null), ArticleFig(id=1241757981159780567, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=图8, caption=
单个散射单元的时域回波示意图, figureFileSmall=jvZaADIQvXkCNuq5TWMFbg==, figureFileBig=ol1pXhndLxGhGnxmYrXWzA==, tableContent=null), ArticleFig(id=1241757981289804000, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Fig. 9, caption=
Results of electromagnetic scattering matrix of ships on sea surface, figureFileSmall=hUuHii1VoPX/k4gppZ8LMg==, figureFileBig=GDK+oCHzsc+tTd3pfv+2CA==, tableContent=null), ArticleFig(id=1241757981424021735, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=图9, caption=
海面舰船电磁散射矩阵结果, figureFileSmall=hUuHii1VoPX/k4gppZ8LMg==, figureFileBig=GDK+oCHzsc+tTd3pfv+2CA==, tableContent=null), ArticleFig(id=1241757981533073646, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Fig.10, caption=
SAR time domain echo imaging of sea surface ships, figureFileSmall=fWrcfWHlix8f8ZivFtjXMA==, figureFileBig=X5F1Du+Mls32hnqhfzxQ6w==, tableContent=null), ArticleFig(id=1241757981654708471, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=图10, caption=
海面舰船SAR时域回波成像图, figureFileSmall=fWrcfWHlix8f8ZivFtjXMA==, figureFileBig=X5F1Du+Mls32hnqhfzxQ6w==, tableContent=null), ArticleFig(id=1241757981738594558, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Table 1, caption=
Time spent on each part of the calculation
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| 计算部分 | 单核CPU/s | 10核CPU/s | GPU/s |
|---|
| 射线跟踪 | 37.578 | 5.195 | 0.674 |
| 电磁计算 | 180.311 | 24.713 | 0.241 |
| 回波仿真 | 1 706.928 | 182.04 | 3.122 |
| 全流程 | 1 924.817 | 211.948 | 4.037 |
), ArticleFig(id=1241757981839257858, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=表1, caption=
各计算部分耗时表格
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| 计算部分 | 单核CPU/s | 10核CPU/s | GPU/s |
|---|
| 射线跟踪 | 37.578 | 5.195 | 0.674 |
| 电磁计算 | 180.311 | 24.713 | 0.241 |
| 回波仿真 | 1 706.928 | 182.04 | 3.122 |
| 全流程 | 1 924.817 | 211.948 | 4.037 |
), ArticleFig(id=1241757981973475593, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=EN, label=Table 2, caption=
The acceleration ratio of each calculation part
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| 计算部分 | 单核CPU/GPU | 10核CPU/GPU |
|---|
| 射线跟踪 | 55.754 | 7.7 077 |
| 电磁计算 | 748.178 | 102.543 5 |
| 回波仿真 | 546.741 | 58.309 |
| 全流程 | 476.794 | 52.501 |
), ArticleFig(id=1241757982082527503, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241757968992105331, language=CN, label=表2, caption=
各计算部分加速比
, figureFileSmall=null, figureFileBig=null, tableContent=
| 计算部分 | 单核CPU/GPU | 10核CPU/GPU |
|---|
| 射线跟踪 | 55.754 | 7.7 077 |
| 电磁计算 | 748.178 | 102.543 5 |
| 回波仿真 | 546.741 | 58.309 |
| 全流程 | 476.794 | 52.501 |
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