载波相位历元差分辅助接收机快速捕获
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摘要
针对接收机在热启动阶段的快速捕获问题,本文提出了一种利用载波相位历元差分辅助接收机捕获的方法。载体在高动态或弱信号情况下,接收机会进入重捕获的状态,此时通过载波相位历元差分解算载体速度,结合星历信息估算出多普勒频移,确定频率搜索范围,可以提升捕获性能。利用载波历元差分辅助捕获,相对于无辅助情况,在信号检测概率达到100%时,信噪比降低了11. 6%,信号到达稳定时的平均捕获时间缩短83. 3%。通过理论分析与实验验证,载波相位历元差分辅助接收机捕获可以降低信噪比要求,缩短平均捕获时间。
Focus on the need of receiver fast acquisition during warm start,a method of receiver acquisition aided by epoch difference carrier phase( EDCP) is proposed. Receiver comes into recapture state as the result of high dynamic or weak signals. EDCP can resolve carrier velocity and determine the search domain with the ephemeris information,which can improve capture performance. Making auxiliary acquisition using by EDCP compare with no auxiliary acquisition,signal-to-noise ratio decreases 11. 6%when the signal detection probability reaches 11. 6%. Mean acquisition time is shortened by 83. 3%.Theoretical analysis and experimental verification show that acquisition with EDCP aided reduces the requirement of signal-to-noise-ratio and shorten the mean acquisition time.
Focus on the need of receiver fast acquisition during warm start,a method of receiver acquisition aided by epoch difference carrier phase( EDCP) is proposed. Receiver comes into recapture state as the result of high dynamic or weak signals. EDCP can resolve carrier velocity and determine the search domain with the ephemeris information,which can improve capture performance. Making auxiliary acquisition using by EDCP compare with no auxiliary acquisition,signal-to-noise ratio decreases 11. 6%when the signal detection probability reaches 11. 6%. Mean acquisition time is shortened by 83. 3%.Theoretical analysis and experimental verification show that acquisition with EDCP aided reduces the requirement of signal-to-noise-ratio and shorten the mean acquisition time.
引文
[1] Xiaoming Han,Guangyu Zheng,Shus-heng Peng. High Dynamic GPS Sign-al Analysis and Acquisition Algorithm[J]. Lecture Notesin Electrical Engine-ering,2011,100(4):773-779.
[2]焦瑞祥,茅旭初.基于DBZP方法的微弱GPS信号快速捕获[J].电子学报,2008,36(12):2285-2289.
[3]李玉红,寇艳红,张其善.微弱GPS信号捕获算法研究[J].遥测遥控,2005,26(4):61-65.
[4]李源明,李晶,张朋,等.应用延迟累加的微弱GPS信号捕获算法[J].测绘学报,2016,45(1):44-49.
[5] M Lashley,D M Bevly,J Y Hung. P-eformance analysis of vector tracking algorithms for weak GPS signals in h-igh dynamics[J]. Selected Topics in Signal Processing,2009,3(4):661-673.
[6]张敏虎,任章.华春红.惯性信息辅助的高动态弱GPS信号快速捕获[J].系统工程与电子技术,2011,33(2):366-369.
[7] R Babu,J Wang,G Rao. Analysis of Ultra tight GPS/INS Integrated Systemfor Navigation Performance[C].Intern-ational Conference on Communicationsand Networking,Chennai,Tamil Nadu,2008:234-237.
[8] Yang Yong. Tightly Coupled MEMS I-NS/GPS integration with INS Aided R-eceiver Tracking Loops[D]. Calgary:University of Calgary,2008. 1-14.
[9] Frank van Grass,Andrey Soloviev. Pr-ecise Velocity Estimation Using a Sta-nd Alone GPS Receiver[J].Journal of the institute of Navigation.2004,51(4):283-292.
[10] Farrell,J L. Carrier phase processing without integers[C]. Proc. of ION 57thannualmeeting/CIGTF 20th biennial gu-idancetest symposium,Albuquerque,N-M,11-13 June 2001,423-428.
[11] Frank van Graas,Andrey Soloviev. P-recise Velocity Estimation Using a St-and-Alone GPSReceiver[C]. The Instit-ute of Navigation,Anaheam Canada,2003,262-271.
[12] J Traugott, F Holzapfel and G Sachs. Conceptual Approach for Precise Rela-tive Positioning with Miniaturized GP-S Loggers and Experimental Results[EB]. http://ftp. rta. nato. int/public//PubFullText/RTO/EN/RTOEN-SET-116(2010)///EN-SET-116(2010)-04.pdf. Feb. 1,2015.
[13] Songlai Han,Jinling Wang,Land Ve-hicle Navigation with the Integration of GPS and Reduced INS:Performan-ce Improvement with Velocity Aiding[J].The Journal of Navigation,2010,63(1):153–166.
[14] Ye Ping,Zhan Xingqun.Novel optimalband width design in INS assisted G-NSS Phase Lock Loop[J]. IEICE Ele-ctronics Express,2011,8(9):650-656.
[15] Lin Zhao,Zhenguo Yuan. SINS/GPS carrier phase rate integrated navigationsystem based on square-root CKF.International Journal of Online Engineeri-ng,2014,10(1):29-32.
[16] B Daniele, S Nadezda, L Gerard. Do-ppler Measurements and Velocity Esti-mation:a Theoretical Framework with Software Receiver Implementation,Proceedings of GNSS 2009,Savannah,2009:1-13.
[2]焦瑞祥,茅旭初.基于DBZP方法的微弱GPS信号快速捕获[J].电子学报,2008,36(12):2285-2289.
[3]李玉红,寇艳红,张其善.微弱GPS信号捕获算法研究[J].遥测遥控,2005,26(4):61-65.
[4]李源明,李晶,张朋,等.应用延迟累加的微弱GPS信号捕获算法[J].测绘学报,2016,45(1):44-49.
[5] M Lashley,D M Bevly,J Y Hung. P-eformance analysis of vector tracking algorithms for weak GPS signals in h-igh dynamics[J]. Selected Topics in Signal Processing,2009,3(4):661-673.
[6]张敏虎,任章.华春红.惯性信息辅助的高动态弱GPS信号快速捕获[J].系统工程与电子技术,2011,33(2):366-369.
[7] R Babu,J Wang,G Rao. Analysis of Ultra tight GPS/INS Integrated Systemfor Navigation Performance[C].Intern-ational Conference on Communicationsand Networking,Chennai,Tamil Nadu,2008:234-237.
[8] Yang Yong. Tightly Coupled MEMS I-NS/GPS integration with INS Aided R-eceiver Tracking Loops[D]. Calgary:University of Calgary,2008. 1-14.
[9] Frank van Grass,Andrey Soloviev. Pr-ecise Velocity Estimation Using a Sta-nd Alone GPS Receiver[J].Journal of the institute of Navigation.2004,51(4):283-292.
[10] Farrell,J L. Carrier phase processing without integers[C]. Proc. of ION 57thannualmeeting/CIGTF 20th biennial gu-idancetest symposium,Albuquerque,N-M,11-13 June 2001,423-428.
[11] Frank van Graas,Andrey Soloviev. P-recise Velocity Estimation Using a St-and-Alone GPSReceiver[C]. The Instit-ute of Navigation,Anaheam Canada,2003,262-271.
[12] J Traugott, F Holzapfel and G Sachs. Conceptual Approach for Precise Rela-tive Positioning with Miniaturized GP-S Loggers and Experimental Results[EB]. http://ftp. rta. nato. int/public//PubFullText/RTO/EN/RTOEN-SET-116(2010)///EN-SET-116(2010)-04.pdf. Feb. 1,2015.
[13] Songlai Han,Jinling Wang,Land Ve-hicle Navigation with the Integration of GPS and Reduced INS:Performan-ce Improvement with Velocity Aiding[J].The Journal of Navigation,2010,63(1):153–166.
[14] Ye Ping,Zhan Xingqun.Novel optimalband width design in INS assisted G-NSS Phase Lock Loop[J]. IEICE Ele-ctronics Express,2011,8(9):650-656.
[15] Lin Zhao,Zhenguo Yuan. SINS/GPS carrier phase rate integrated navigationsystem based on square-root CKF.International Journal of Online Engineeri-ng,2014,10(1):29-32.
[16] B Daniele, S Nadezda, L Gerard. Do-ppler Measurements and Velocity Esti-mation:a Theoretical Framework with Software Receiver Implementation,Proceedings of GNSS 2009,Savannah,2009:1-13.