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时间:2020-06-05
《噪声干扰背景下压缩感知雷达波形优化设计.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第3期电子学报V01.42No.320l4年3月ACI1A眦CRON1CASINICAMar.2Ol4噪声干扰背景下压缩感知雷达波形优化设计贺亚鹏一,朱晓华,李洪涛,顾陈(1.南京理工大学电子工程与光电技术学院,江苏南京2100942.中国空间技术研究院西安分院,陕西西安710000)摘要:为改善压缩感知雷达(CompressiveSensingRadar,CSR)在干扰噪声背景下目标检测及距离.多普勒参数的估计性能,该文提出一种感知矩阵平均相干系数(AveragedCoherenceoftheSensingMatr
2、ix,ACSM)与信干噪比(SignaltoInterferenceandNoiseRatio,SINR)联合优化的波形设计方法.文中首先建立了CSR距离.多普勒二维参数感知模型,推导了波形联合优化设计的目标函数,其次以多相编码信号作为优化码型并采用模拟退火(SimulatedAnnealing,SA)算法对目标函数进行优化求解.与传统CSR波形相比,优化设计的波形提高了CSR在低信干噪比条件下的成功检测概率,同时有效降低了目标距离.多普勒参数估计误差,由此改善了CSR在干扰噪声背景下的距离一多普勒成像质量.计算机仿
3、真验证了该方法的有效性.关键词:压缩感知雷达;波形设计;感知矩阵平均相干系数;信干噪比;模拟退火中图分类号:TN957.5文献标识码:A文章编号:0372.2112(2014)03.0469—08电子学报URL:http://www.ejottma1.org.cnDOI:10.3969/j.issn.0372—2112.2014.03.008WaveformDesignforCompressiveSensingRadarinthePresenceofInterferenceandNoiseHEYa.pengl,2ZH
4、UXiao—hua。LIHong—tao,GUChenl,(1.SchoolofElectronicandOpticalEngineering,NanjingUniversityScienceandTechnology,Nanjing,Jiangsu210094,China2.ChinaAcademyofSpaceTechnologyatm,Xian,Shaanxi710000,China)Abstract:Aimingatimprovingtheperformanceoftargetsdetectionandran
5、ge-Dopplerparametersestimationforcompres-sivesensingradar(CSR)amidinterferenceandnoise,aCSRjointoptimalwaveformdesignmethodisproposedtominimizetheav—eragedcoherenceofthesensingmatrix(ACSM)andthesignaltointerferenceandnoiseratio(SINR)simultaneously.First,aCSRtwo
6、-dimensionalsensingmodelforrange-Dopplerestimationisestablishedandawaveformjointoptimizationobjectfunctionisde-rived.Then,thesimulatedannealing(SA)~gofithmisemployedtoobtaintheoptimalsolution,wherethepolyphasecodedsignalistakenintoaccount.Comparedwiththetraditi
7、onalCSRwaveforms,theoptimizedwaveformenhancestheCSRsuccessfuldetectionprobabilityinthelowSINRconditions,andalsoefectivelyreducesthetargetrange—Dopplerparameterestimationerror,therebyim—provingtheCSRrange-Dopplerimagingquality.Simulationresultsshowtheefectivenes
8、softheproposedmethod.Keywords:compressivesensingradar(CSR);waveformoptimization;averagedcoherenceofthesensingmatrix(ACSM);signaltointerferenceandnoiseratio(SINR);simulatedsn
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