Article(id=1241697943468692385, tenantId=1146029695717560320, journalId=1238841944844054536, issueId=1241697942122328272, articleNumber=null, orderNo=null, doi=10.12347/j.ycyk.20240530001, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1716998400000, receivedDateStr=2024-05-30, revisedDate=1718035200000, revisedDateStr=2024-06-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1773973459355, onlineDateStr=2026-03-20, pubDate=1726329600000, pubDateStr=2024-09-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773973459355, onlineIssueDateStr=2026-03-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773973459355, creator=13701087609, updateTime=1773973459355, updator=13701087609, issue=Issue{id=1241697942122328272, tenantId=1146029695717560320, journalId=1238841944844054536, year='2024', volume='45', issue='5', pageStart='1', pageEnd='128', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773973459034, creator=13701087609, updateTime=1773973945698, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241699983414580120, tenantId=1146029695717560320, journalId=1238841944844054536, issueId=1241697942122328272, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241699983414580121, tenantId=1146029695717560320, journalId=1238841944844054536, issueId=1241697942122328272, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=82, endPage=90, ext={EN=ArticleExt(id=1241697943678407587, articleId=1241697943468692385, tenantId=1146029695717560320, journalId=1238841944844054536, language=EN, title=Improved Method for GPS Carrier-to-Noise Ratio Estimation, columnId=1239133503154081962, journalTitle=Journal of Telemetry, Tracking and Command, columnName=TT & C Communication and Navigation, runingTitle=null, highlight=null, articleAbstract=
In order to find a carrier-to-noise ratio estimation method with low computation and strong practicality, this paper draws on the experience of the classical variance summing method and proposes an improved algorithm. The distribution of the absolute value of the I-branch accumulative value is deduced when stably tracking GPS signals, and an expression for estimating the carrier-to-noise ratio is given based on its statistical characteristics. The Q-branch accumulative value is not necessary in this algorithm. From the aspects of estimation accuracy and computation, the improved algorithm is verified by simulation and actual measurement data analysis. The results show that the overall performance of the improved algorithm is equivalent, with an error of less than 0.4 dBHz, the stability is better than that of the classical variance summing method and narrow to wide power ratio method, and the computation is reduced by 50% compared to that the classical algorithm. The method has certain practicality in some receivers with limited hardware resources.
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为找到一种计算量低和实用性强的载噪比估计算法,本文分析了宽窄带功率比值法与方差求和法的计算思路,提出一种改进的载噪比估计算法。在稳定跟踪GPS信号时,对I支路累加值的绝对值分布进行了推导,利用其统计特性给出了一种估计载噪比的表达式,算法不需要Q支路的累加值信息。从估计精度和计算量两个角度进行了仿真验证和实测数据分析,结果表明:改进算法的总体性能与经典方差求和法相当,其估计偏差小于0.4 dBHz,稳定性比宽窄带功率比值法与方差求和法更好,计算量相较于经典算法降低了50%,在硬件资源紧张的接收机中有一定的实用性。
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周里 1998年生,硕士,助理工程师。
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周里 1998年生,硕士,助理工程师。
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彭舒文 1996年生,硕士,助理工程师。
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张锦 1996年生,硕士,助理工程师。
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2020., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1241712928378909072, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, xref=null, ext=[AuthorCompanyExt(id=1241712928391491985, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, companyId=1241712928378909072, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Shanghai Aerospace Electronic Technology Institute, Shanghai 201109, China), AuthorCompanyExt(id=1241712928404074900, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, companyId=1241712928378909072, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=上海航天电子技术研究所 上海 201109)])], figs=[ArticleFig(id=1241712932116034024, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.1, caption=
Block diagram of the tracking channel of GPS receivers, figureFileSmall=Szr7H2MLks7Vwtyrb6RojA==, figureFileBig=x2eaNciGSp6J7Ls2RYd0Mw==, tableContent=null), ArticleFig(id=1241712932187337195, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图1, caption=
GPS接收机的跟踪通道框图, figureFileSmall=Szr7H2MLks7Vwtyrb6RojA==, figureFileBig=x2eaNciGSp6J7Ls2RYd0Mw==, tableContent=null), ArticleFig(id=1241712932296389103, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.2, caption=
The carrier-to-noise ratio estimation, figureFileSmall=XFe8tDyixCZAShLZPShI5Q==, figureFileBig=pgsIQIAeVLXG6eX13XOYPQ==, tableContent=null), ArticleFig(id=1241712932376080882, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图2, caption=
估计载噪比, figureFileSmall=XFe8tDyixCZAShLZPShI5Q==, figureFileBig=pgsIQIAeVLXG6eX13XOYPQ==, tableContent=null), ArticleFig(id=1241712932451578357, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.3, caption=
Estimation error at different carrier-to-noise ratios, figureFileSmall=Gl2i9waB6881dZIurSNglA==, figureFileBig=8Jw8dDA7KA8kfqgUUGHPcQ==, tableContent=null), ArticleFig(id=1241712932527075831, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图3, caption=
不同载噪比下的估计误差, figureFileSmall=Gl2i9waB6881dZIurSNglA==, figureFileBig=8Jw8dDA7KA8kfqgUUGHPcQ==, tableContent=null), ArticleFig(id=1241712932627739130, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.4, caption=
Estimation error corresponding to different phase differences, figureFileSmall=yp5pOrR4Xf4XxJLGPxMXqQ==, figureFileBig=g+JvPnxgfbn7jftObA7e2w==, tableContent=null), ArticleFig(id=1241712932694847996, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图4, caption=
不同相位差对应的估计误差, figureFileSmall=yp5pOrR4Xf4XxJLGPxMXqQ==, figureFileBig=g+JvPnxgfbn7jftObA7e2w==, tableContent=null), ArticleFig(id=1241712932770345470, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.5, caption=
Flow diagram of the improved GPS carrier-to-noise ratio estimation algorithm, figureFileSmall=VRhvCuxMxqo9tv7DfXeVnA==, figureFileBig=ks747wZrRqybPojge7s5Dg==, tableContent=null), ArticleFig(id=1241712932917146112, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图5, caption=
改进的GPS载噪比估计算法流程图, figureFileSmall=VRhvCuxMxqo9tv7DfXeVnA==, figureFileBig=ks747wZrRqybPojge7s5Dg==, tableContent=null), ArticleFig(id=1241712933005226498, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.6, caption=
Comparison of the estimation bias of the carrier-to-noise ratio of the three methods, figureFileSmall=zIVPCcEehpVPfsXfVsSp+g==, figureFileBig=MNypI5hRAZGaG0Fri013sA==, tableContent=null), ArticleFig(id=1241712933084918276, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图6, caption=
三种方法载噪比估计偏差对比, figureFileSmall=zIVPCcEehpVPfsXfVsSp+g==, figureFileBig=MNypI5hRAZGaG0Fri013sA==, tableContent=null), ArticleFig(id=1241712933181387270, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.7, caption=
Comparison of the standard deviation of the carrier-to-noise ratio of the three methods, figureFileSmall=2wN6o9u2WeuK6cTqNerAtg==, figureFileBig=k3f/EqZPen2JYIdh0zIyvA==, tableContent=null), ArticleFig(id=1241712933252690439, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图7, caption=
三种方法载噪比标准差对比, figureFileSmall=2wN6o9u2WeuK6cTqNerAtg==, figureFileBig=k3f/EqZPen2JYIdh0zIyvA==, tableContent=null), ArticleFig(id=1241712933323993609, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.8, caption=
PRN21, figureFileSmall=K/dfZGe7rrgqDBqMwQ9Xgw==, figureFileBig=HQWHESz6eVg9Q7z6b9vwvA==, tableContent=null), ArticleFig(id=1241712933412073995, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图8, caption=
PRN21, figureFileSmall=K/dfZGe7rrgqDBqMwQ9Xgw==, figureFileBig=HQWHESz6eVg9Q7z6b9vwvA==, tableContent=null), ArticleFig(id=1241712933504348685, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.9, caption=
PRN22, figureFileSmall=tAkxLZwg2t0X47lQR/0wOw==, figureFileBig=PtW7wL036Ucrx1j8X+lChw==, tableContent=null), ArticleFig(id=1241712933621789199, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图9, caption=
PRN22, figureFileSmall=tAkxLZwg2t0X47lQR/0wOw==, figureFileBig=PtW7wL036Ucrx1j8X+lChw==, tableContent=null), ArticleFig(id=1241712933705675281, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.10, caption=
PRN15, figureFileSmall=gg70qglx83yOTMutsgsn4Q==, figureFileBig=tMs4t2BfLWWZ6C40VPjWhQ==, tableContent=null), ArticleFig(id=1241712933760201235, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图10, caption=
PRN15, figureFileSmall=gg70qglx83yOTMutsgsn4Q==, figureFileBig=tMs4t2BfLWWZ6C40VPjWhQ==, tableContent=null), ArticleFig(id=1241712935232401941, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.11, caption=
PRN18, figureFileSmall=sia9rYAZbQS8/qWlOB3cxQ==, figureFileBig=DBDtEDgDznXGtSjs/tFKIw==, tableContent=null), ArticleFig(id=1241712935312093719, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图11, caption=
PRN18, figureFileSmall=sia9rYAZbQS8/qWlOB3cxQ==, figureFileBig=DBDtEDgDznXGtSjs/tFKIw==, tableContent=null), ArticleFig(id=1241712935375008281, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.12, caption=
I-branch coherent integral value, figureFileSmall=YjxYzxMwkmlGgLled8DKlQ==, figureFileBig=hkGsP9XiWeTvfSNZENKyag==, tableContent=null), ArticleFig(id=1241712935433728538, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图12, caption=
I支路相干积分值, figureFileSmall=YjxYzxMwkmlGgLled8DKlQ==, figureFileBig=hkGsP9XiWeTvfSNZENKyag==, tableContent=null), ArticleFig(id=1241712935500837404, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Fig.13, caption=
Q-branch coherent integral value, figureFileSmall=GcPKLPVPZH/q1kvfPWPnpg==, figureFileBig=dsQuzoNlxOK9rHjJzUPQzA==, tableContent=null), ArticleFig(id=1241712935572140573, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=图13, caption=
Q支路相干积分值, figureFileSmall=GcPKLPVPZH/q1kvfPWPnpg==, figureFileBig=dsQuzoNlxOK9rHjJzUPQzA==, tableContent=null), ArticleFig(id=1241712935643443743, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=EN, label=Table 1, caption=
Comparison of the amount of computation of algorithms
, figureFileSmall=null, figureFileBig=null, tableContent=
| 算法 | 加法 | 乘法 | 开方 | 取log |
|---|
| VSM | 3999 | 3002 | 1 | 1 |
| NWPRM | 3952 | 2 154 | 0 | 1 |
| 改进算法 | 1998 | 1 004 | 0 | 1 |
), ArticleFig(id=1241712935710552609, tenantId=1146029695717560320, journalId=1238841944844054536, articleId=1241697943468692385, language=CN, label=表1, caption=
算法计算量比较
, figureFileSmall=null, figureFileBig=null, tableContent=
| 算法 | 加法 | 乘法 | 开方 | 取log |
|---|
| VSM | 3999 | 3002 | 1 | 1 |
| NWPRM | 3952 | 2 154 | 0 | 1 |
| 改进算法 | 1998 | 1 004 | 0 | 1 |
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