| 摘要: |
| 在辐射源个体识别技术中，辐射源细微指纹特征易受接收机通道畸变的影响，这种影响在数字多波束接收系统中更为复杂，因为最终信号是多个接收通道波束合成的结果。针对该问题，对数字多波束接收系统的接收通道畸变、波束合成和通道间幅相一致性对辐射源个体识别的影响进行了理论分析和仿真实验。结果表明，波束合成信号的指纹特征同时受到接收通道畸变和通道间幅相不一致性的影响，个体识别性能随通道畸变和幅相不一致性的增加而降低；跨波束场景下的个体识别性能有所恶化，且随着通道畸变的增加性能恶化越明显，正确率下降达13.8%。在使用多波束接收系统进行辐射源个体识别时，不仅要提高通道间幅相一致性，还要减小接收通道畸变。 |
| 关键词: 辐射源个体识别 多波束接收系统 接收通道畸变 通道幅相一致性 |
| DOI：10.20079/j.issn.1001-893x.240228002 |
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| 基金项目:2023年扬州市“绿扬金凤计划”人才项目（YZLYJFJH2023YXBS047） |
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| Effect of DBF Receiver on Performance of Specific Emitter Identification |
| HUANG Junyuan,XIA Shaojun |
| (1.School of Electronic Engineering,Yangzhou Polytechnic College,Yangzhou 225009,China;2.The 38th Research Institute of China Electronics Technology Group Corporation,Hefei 230088,China) |
| Abstract: |
| In the specific emitter identification(SEI) technology,radio frequency fingerprints(RFF) are affected by the receiver distortions.This situation will be more complicated for digital beam forming(DBF) receivers because the signals are processed by multichannel beam forming.For this problem,the effects of DBF receivers on the SEI performance are analyzed.The theoretical analysis and simulation results show that the RFF is affected by both receiver channel distortion and inter-channel mismatch,and SEI accuracy decreases with the increase of receiver channel distortion and inter-channel mismatch.The cross-beam SEI performance is worse than that of same-beam scenario,the accuracy decreases by 13.8%.It is indicated that it is crucial to decrease the channel distortion and inter-channel mismatch for SEI using DBF receivers. |
| Key words: specific emitter identification DBF receiver receive channel distortion inter-channel mismatch |
《电讯技术》编辑部 