Article(id=1149768950684238005, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1149768937925165147, articleNumber=null, orderNo=null, doi=10.12404/j.issn.1671-1815.2405148, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1720540800000, receivedDateStr=2024-07-10, revisedDate=1732377600000, revisedDateStr=2024-11-24, acceptedDate=null, acceptedDateStr=null, onlineDate=1752055879516, onlineDateStr=2025-07-09, pubDate=1748361600000, pubDateStr=2025-05-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1752055879516, onlineIssueDateStr=2025-07-09, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1752055879516, creator=13701087609, updateTime=1752055879516, updator=13701087609, issue=Issue{id=1149768937925165147, tenantId=1146029695717560320, journalId=1146123166801305609, year='2025', volume='25', issue='15', pageStart='6155', pageEnd='6586', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=0, createTime=1752055876475, creator=13701087609, updateTime=1768456822194, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1218559490207699090, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1149768937925165147, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1218559490211893395, tenantId=1146029695717560320, journalId=1146123166801305609, issueId=1149768937925165147, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=6389, endPage=6396, ext={EN=ArticleExt(id=1149768951619567816, articleId=1149768950684238005, tenantId=1146029695717560320, journalId=1146123166801305609, language=EN, title=Relationship between DME Decision and Signal-to-noise Ratio, columnId=1172606853226840582, journalTitle=Science Technology and Engineering, columnName=Papers·Electronic and Communicational Technology, runingTitle=null, highlight=null, articleAbstract=
Noise signals are added to the signal during transmission, resulting in changes in the amplitude of the signal, thus affecting the reception sensitivity. In order to study the relationship between noise and sensitivity, two signal-to-noise ratio calculation methods were used, and digital filtering, pulse peak extraction and half-amplitude point calculation were processed on the signals, which in turn complete the judgment and sensitivity calculation of DME(distance measuring equipment) signals, and based on which the relationship between DME judgment and the size of signal-to-noise ratio was analyzed. The results show that when the signal-to-noise ratio is small and the signal strength is sufficiently small, the accuracy of the DME judgment is greatly affected by the noise signal, which will lead to the reduction of the ranging accuracy.
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信号在传输过程中会有噪声信号的加入,导致信号的幅值发生变化,从而对接收灵敏度造成影响。为了研究噪声与灵敏度之间的关系,采用两种信噪比计算方法,并通过对信号进行数字滤波、脉冲峰值提取和半幅点计算处理,进而完成DME(distance measuring equipment)信号的判决与灵敏度计算,并基于此分析DME判决与信噪比大小之间的关系。结果表明,在信噪比较小且信号强度足够小时,DME判决的准确性受噪声信号影响较大,从而会导致测距精度降低。
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胡铁乔(1970—),男,汉族,河南洛阳人,硕士,副教授。研究方向:基于FPGA、DSP高速处理平台的阵列信号处理。E-mail:tqhu@cauc.edu.cn。
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胡铁乔(1970—),男,汉族,河南洛阳人,硕士,副教授。研究方向:基于FPGA、DSP高速处理平台的阵列信号处理。E-mail:tqhu@cauc.edu.cn。
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胡铁乔(1970—),男,汉族,河南洛阳人,硕士,副教授。研究方向:基于FPGA、DSP高速处理平台的阵列信号处理。E-mail:tqhu@cauc.edu.cn。
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42(2): 28-31., articleTitle=The effect and elimination of multipath interference in pulse distance measuring system, refAbstract=null)], funds=[Fund(id=1172924392750330577, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, awardId=2023YFB3907003, language=CN, fundingSource=国家重点研发计划(2023YFB3907003), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1172924387050271380, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, xref=null, ext=[AuthorCompanyExt(id=1172924387054465685, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, companyId=1172924387050271380, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=College of Electronic Signal and Automation, Civil Aviation University of China, Tianjin 300300, China), AuthorCompanyExt(id=1172924387062854294, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, companyId=1172924387050271380, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中国民航大学电子信号与自动化学院, 天津 300300)])], figs=[ArticleFig(id=1172924388669272745, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.1, caption=
Ask about the signal graph, figureFileSmall=bCsdV0nsZBX5k/O/UwTwsw==, figureFileBig=Tokmqgi+KnrPfqeMyQrbxA==, tableContent=null), ArticleFig(id=1172924388744770218, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图1, caption=
询问信号曲线图, figureFileSmall=bCsdV0nsZBX5k/O/UwTwsw==, figureFileBig=Tokmqgi+KnrPfqeMyQrbxA==, tableContent=null), ArticleFig(id=1172924388853822123, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.2, caption=
Block diagram of the DME judgment processing process, figureFileSmall=IQC1Tg6z8bXxYaS3FIwjlw==, figureFileBig=y3Lo+UjqsqhEJcsOXnJNPg==, tableContent=null), ArticleFig(id=1172924388929319596, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图2, caption=
DME判决处理过程框图, figureFileSmall=IQC1Tg6z8bXxYaS3FIwjlw==, figureFileBig=y3Lo+UjqsqhEJcsOXnJNPg==, tableContent=null), ArticleFig(id=1172924389017399981, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.3, caption=
Comparison of IF with or without noise (10 dB), figureFileSmall=FtOgftI/YDd5lEpnhsje4Q==, figureFileBig=9sjIyqeFJl+uEOCvrf/zWw==, tableContent=null), ArticleFig(id=1172924389113868974, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图3, caption=
中频有无噪声对比(10 dB), figureFileSmall=FtOgftI/YDd5lEpnhsje4Q==, figureFileBig=9sjIyqeFJl+uEOCvrf/zWw==, tableContent=null), ArticleFig(id=1172924389206143663, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.4, caption=
Comparison before and after envelope detection, figureFileSmall=MjBkpstiXsr8l2D76QKxxQ==, figureFileBig=9NWOj+OqlDAKpFx3Q/0/2Q==, tableContent=null), ArticleFig(id=1172924389273252528, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图4, caption=
包络检波前后对比, figureFileSmall=MjBkpstiXsr8l2D76QKxxQ==, figureFileBig=9NWOj+OqlDAKpFx3Q/0/2Q==, tableContent=null), ArticleFig(id=1172924389365527217, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.5, caption=
Comparison of baseband signals before and after filtering, figureFileSmall=mq3DR0hIf1X/cNFqhfT/Ug==, figureFileBig=XTe/eDSFZP0ZW94FiBJ83A==, tableContent=null), ArticleFig(id=1172924389495550642, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图5, caption=
滤波前后基带信号对比, figureFileSmall=mq3DR0hIf1X/cNFqhfT/Ug==, figureFileBig=XTe/eDSFZP0ZW94FiBJ83A==, tableContent=null), ArticleFig(id=1172924389550076595, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.6, caption=
Comparison of baseband signals with filtered time delay compensation, figureFileSmall=DjlUcd4Scy1LJFlrJtaAJw==, figureFileBig=tqplS/96s+Yi+wc5m8fyPg==, tableContent=null), ArticleFig(id=1172924389722043060, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图6, caption=
滤波后补偿时延的基带信号对比, figureFileSmall=DjlUcd4Scy1LJFlrJtaAJw==, figureFileBig=tqplS/96s+Yi+wc5m8fyPg==, tableContent=null), ArticleFig(id=1172924389835289269, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.7, caption=
Time-domain comparison of baseband signals with different signal-to-noise ratios and demodulated baseband signals under the peak method, figureFileSmall=bMVK8RpJalu0IMEvu6rDJA==, figureFileBig=1cGIdc3RcEiObTJmkk/sCQ==, tableContent=null), ArticleFig(id=1172924389910786742, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图7, caption=
峰值法下不同信噪比的基带信号和解调后基带信号的时域对比, figureFileSmall=bMVK8RpJalu0IMEvu6rDJA==, figureFileBig=1cGIdc3RcEiObTJmkk/sCQ==, tableContent=null), ArticleFig(id=1172924389969506999, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.8, caption=
Time-domain comparison of baseband signals with different signal-to-noise ratios and demodulated baseband signals under the mean method, figureFileSmall=ZP/KEwGWKEwu0Fxu1I5jpQ==, figureFileBig=Gs0cqaTRcUNHBmqOzplBOA==, tableContent=null), ArticleFig(id=1172924390040810168, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图8, caption=
均值法下不同信噪比的基带信号和解调后基带信号的时域对比, figureFileSmall=ZP/KEwGWKEwu0Fxu1I5jpQ==, figureFileBig=Gs0cqaTRcUNHBmqOzplBOA==, tableContent=null), ArticleFig(id=1172924390133084857, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.9, caption=
Comparison of the time domain of DME judgments with different signal-to-noise ratios, figureFileSmall=ijhqY+z/j628VKqz1te0mA==, figureFileBig=YVqAytdPeSlWvf3f0NR+zg==, tableContent=null), ArticleFig(id=1172924390200193722, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图9, caption=
不同信噪比下的DME判决时域对比, figureFileSmall=ijhqY+z/j628VKqz1te0mA==, figureFileBig=YVqAytdPeSlWvf3f0NR+zg==, tableContent=null), ArticleFig(id=1172924390271496891, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.10, caption=
Time-domain plots of -10 dB and -90 dB signal strengths, figureFileSmall=S38+ePoUAw3bC+ChKk2DCA==, figureFileBig=DDM/Dv4ZX/EPFZaqlxeDHw==, tableContent=null), ArticleFig(id=1172924390330217148, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图10, caption=
-10 dB和-90 dB信号强度的时域图, figureFileSmall=S38+ePoUAw3bC+ChKk2DCA==, figureFileBig=DDM/Dv4ZX/EPFZaqlxeDHw==, tableContent=null), ArticleFig(id=1172924390422491837, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.11, caption=
DME verdict at -10 dB and -90 dB signal strengths yields rectangular pulses, figureFileSmall=+A+OM9Hj51ELmAMGt1/5Ng==, figureFileBig=GCq88XgJdfei8o+8nLgkZw==, tableContent=null), ArticleFig(id=1172924390510572222, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图11, caption=
-10 dB和-90 dB信号强度下的DME判决得到矩形脉冲, figureFileSmall=+A+OM9Hj51ELmAMGt1/5Ng==, figureFileBig=GCq88XgJdfei8o+8nLgkZw==, tableContent=null), ArticleFig(id=1172924390569292479, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.12, caption=
Relationship between DME signal strength and signal-to-noise ratio, figureFileSmall=kovc+WcCvEBJtRwhvJq4qw==, figureFileBig=SHertwaXH3EvE8Zym1IYNQ==, tableContent=null), ArticleFig(id=1172924390699315904, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图12, caption=
DME信号强度与信噪比的关系, figureFileSmall=kovc+WcCvEBJtRwhvJq4qw==, figureFileBig=SHertwaXH3EvE8Zym1IYNQ==, tableContent=null), ArticleFig(id=1172924390833533633, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.13, caption=
DME decision time-domain waveform of the interrogation signal, figureFileSmall=cizTHiPCdmA/u7EbipIFtw==, figureFileBig=lb8J41Qe0vsXMxd9ibpXug==, tableContent=null), ArticleFig(id=1172924390934196930, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图13, caption=
询问信号的DME判决时域波形图, figureFileSmall=cizTHiPCdmA/u7EbipIFtw==, figureFileBig=lb8J41Qe0vsXMxd9ibpXug==, tableContent=null), ArticleFig(id=1172924391055831747, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.14, caption=
Time-domain waveform of amplitude modulation demodulation of an IF response signal, figureFileSmall=LUS3Wh41aSgkeleiqewJaA==, figureFileBig=qGAkEcgNtc+4uJ0SaLGuvA==, tableContent=null), ArticleFig(id=1172924391194243780, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图14, caption=
中频应答信号的调幅解调的时域波形图, figureFileSmall=LUS3Wh41aSgkeleiqewJaA==, figureFileBig=qGAkEcgNtc+4uJ0SaLGuvA==, tableContent=null), ArticleFig(id=1172924391294907077, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.15, caption=
Time-domain waveform of DME judgment after IF response signal demodulation, figureFileSmall=xKRhZSdLGGDJBVZNiO5rXw==, figureFileBig=uYftQaCVbLLSM+O02cOTVA==, tableContent=null), ArticleFig(id=1172924391370404550, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图15, caption=
中频应答信号解调后DME判决时域波形图, figureFileSmall=xKRhZSdLGGDJBVZNiO5rXw==, figureFileBig=uYftQaCVbLLSM+O02cOTVA==, tableContent=null), ArticleFig(id=1172924391441707719, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Fig.16, caption=
DME decision time-domain waveform of the response signal, figureFileSmall=InZ3UBME72krzeodgh+tSg==, figureFileBig=HlNWnSbfUXX53PYiaUuXsQ==, tableContent=null), ArticleFig(id=1172924391538176712, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=图16, caption=
应答信号的DME判决时域波形图, figureFileSmall=InZ3UBME72krzeodgh+tSg==, figureFileBig=HlNWnSbfUXX53PYiaUuXsQ==, tableContent=null), ArticleFig(id=1172924391651422921, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Table 1, caption=
Signal-to-noise ratio calculation results of the noise signal generated by the peak method
, figureFileSmall=null, figureFileBig=null, tableContent=
加入SNR/ dBm | OOK调制计算 SNR方法/dBm | 峰值法计算 SNR/dBm | 相对误差/ dBm |
| 5 | 4.65 | 6.52 | 1.52 |
| 10 | 9.35 | 11.30 | 1.30 |
| 15 | 14.56 | 16.25 | 1.25 |
| 20 | 19.54 | 21.22 | 1.22 |
| 30 | 30.51 | 31.25 | 1.25 |
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峰值法生成的噪声信号计算信噪比结果表
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加入SNR/ dBm | OOK调制计算 SNR方法/dBm | 峰值法计算 SNR/dBm | 相对误差/ dBm |
| 5 | 4.65 | 6.52 | 1.52 |
| 10 | 9.35 | 11.30 | 1.30 |
| 15 | 14.56 | 16.25 | 1.25 |
| 20 | 19.54 | 21.22 | 1.22 |
| 30 | 30.51 | 31.25 | 1.25 |
), ArticleFig(id=1172924391831777995, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Table 2, caption=
Signal-to-noise ratio calculation results of noise signals generated by the mean method
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加入SNR/ dBm | OOK调制计算SNR 方法/dBm | 区间均值法计算 SNR/dBm | 相对误差/ dBm |
| 5 | 4.65 | 6.42 | 1.42 |
| 10 | 9.35 | 11.28 | 1.28 |
| 15 | 14.56 | 16.19 | 1.19 |
| 20 | 19.54 | 21.03 | 1.03 |
| 30 | 30.51 | 31.03 | 1.03 |
), ArticleFig(id=1172924391970190028, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=表2, caption=
均值法生成的噪声信号计算信噪比结果表
, figureFileSmall=null, figureFileBig=null, tableContent=
加入SNR/ dBm | OOK调制计算SNR 方法/dBm | 区间均值法计算 SNR/dBm | 相对误差/ dBm |
| 5 | 4.65 | 6.42 | 1.42 |
| 10 | 9.35 | 11.28 | 1.28 |
| 15 | 14.56 | 16.19 | 1.19 |
| 20 | 19.54 | 21.03 | 1.03 |
| 30 | 30.51 | 31.03 | 1.03 |
), ArticleFig(id=1172924392116990669, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Table 3, caption=
Two methods are used to calculate the signal-to-noise ratio at different signal strengths
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信号强度/ dBm | 峰值法计算 SNR/dBm | 区间均值法计算 SNR/dBm |
| -10 | 56.01 | 54.20 |
| -70 | 28.12 | 25.90 |
| -80 | 17.02 | 14.81 |
| -85 | 12.91 | 11.41 |
| -90 | 6.09 | 3.70 |
), ArticleFig(id=1172924392209265358, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=表3, caption=
两种方法计算不同信号强度下的信噪比
, figureFileSmall=null, figureFileBig=null, tableContent=
信号强度/ dBm | 峰值法计算 SNR/dBm | 区间均值法计算 SNR/dBm |
| -10 | 56.01 | 54.20 |
| -70 | 28.12 | 25.90 |
| -80 | 17.02 | 14.81 |
| -85 | 12.91 | 11.41 |
| -90 | 6.09 | 3.70 |
), ArticleFig(id=1172924392318317263, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=EN, label=Table 4, caption=
The two methods compare the signal-to-noise ratios of the interrogation and response signals
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信号强度/ dBm | 峰值法计算 SNR/dBm | 区间均值法计算 SNR/dBm |
| 询问信号(1 082 MHz) | 23.162 5 | 24.168 0 |
| 应答信号(1 019 MHz) | 23.925 1 | 23.845 3 |
| 应答中频信号(1 019 MHz) | 27.018 0 | 22.452 2 |
), ArticleFig(id=1172924392569975504, tenantId=1146029695717560320, journalId=1146123166801305609, articleId=1149768950684238005, language=CN, label=表4, caption=
两种方法计算询问和应答信号的信噪比对比
, figureFileSmall=null, figureFileBig=null, tableContent=
信号强度/ dBm | 峰值法计算 SNR/dBm | 区间均值法计算 SNR/dBm |
| 询问信号(1 082 MHz) | 23.162 5 | 24.168 0 |
| 应答信号(1 019 MHz) | 23.925 1 | 23.845 3 |
| 应答中频信号(1 019 MHz) | 27.018 0 | 22.452 2 |
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