利用多相关器的伪码测距多址干扰抑制算法性能分析
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摘要
伪码跟踪多相关器技术广泛应用于导航接收机抗多径和导航信号质量监测。论文通过对比分析多径和多址信号对导航信号相关峰畸变的影响,揭示了多相关器技术可用于多址干扰抑制。通过仿真分析了多址误差随期望接收信号与干扰信号功率差和载波多普勒频率差的变化规律,并与传统的并行多址干扰对消方法进行了对比。仿真结果表明当多址干扰信号功率差小于10d B时,ELS和Double-delta与单级并行干扰对消方法的性能相当,但是实现复杂度大大降低。
Multicorrelator techniques for PN code tracking are widely used in navigation receiver for multipath mitigation and navigation signal quality monitoring. By comparing the effects of multipath signal on the navigation signal correlation peak distortion with that of multiple access signal,this paper reveals that the multicorrelator techniques can be used for multiple access interference suppression. The variance of multiple access interference errors with various power difference and carrier Doppler frequency difference between the desired signal and the interference signal is analyzed through simulation,and compared with the traditional parallel interference cancellation methods. Simulation results show that when the power difference between multi-access interference signal and desired signal is less than 10 d B,the performance of ELS and Double-delta techniques is the same with the single-stage parallel interference cancellation method,but the implementation complexity is greatly reduced.
Multicorrelator techniques for PN code tracking are widely used in navigation receiver for multipath mitigation and navigation signal quality monitoring. By comparing the effects of multipath signal on the navigation signal correlation peak distortion with that of multiple access signal,this paper reveals that the multicorrelator techniques can be used for multiple access interference suppression. The variance of multiple access interference errors with various power difference and carrier Doppler frequency difference between the desired signal and the interference signal is analyzed through simulation,and compared with the traditional parallel interference cancellation methods. Simulation results show that when the power difference between multi-access interference signal and desired signal is less than 10 d B,the performance of ELS and Double-delta techniques is the same with the single-stage parallel interference cancellation method,but the implementation complexity is greatly reduced.
引文
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[6]Yoo K,Kong S-H.PIC technique with reduced complexity in GPS[C]∥IEEE/ION Position,Location and Navigation Symposium,PLANS 2014.Monterey,CA,United states:Institute of Electrical and Electronics Engineers Inc.2014:541-546.
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[9]Shanmugam S K,Navstar.Improving GPS L1 C/A Code Correlation Properties Using a Novel Multi-correlator Differential Detection Technique[C]∥Proceedings of the19th International Technical Meeting of the Satellite Division of the Institute of Navigation.2006:2453-2464.
[10]Tian Y,Liu F,Zeng T.Analysis of Cross Correlation on Code Tracking and Mitigation Techniques using Advanced Correlator[C]∥Proceedings of The Institute of Navigation 2010 International Technical Meeting.San Diego,CA.2010:909-915.
[11]谢钢.GPS原理与接收机设计[M].北京:电子工业出版社,2009:22-26.Xie G.Principles of GPS and Receiver Design[M].Beijing:Publishing House of Electronics Industry,2009:22-26.(in Chinese)
[12]Misra P,Enge P.全球定位系统-信号、测量与性能[M].罗鸣,曹冲,肖雄兵,等,译.(第二版),北京:电子工业出版社,2008:275-279.Misra P,Enge P.GPS Signals,Measurements,and Performance[M].Luo M,Cao C,Xiao X B,et al,translation.(2rd edition),Beijing:Publishing House of Electronics Industry,2008:275-279.(in Chinese)
[13]Madhani P H,Axelrad P,Krumvieda K,et al.Application of Successive Interference Cancellation to the CPS Pseudolite Near-Far Problem[J].IEEE Transactions on Aerospace and Electronic Systems,2003,39(2):481-488.
[2]Zhu Z,van Graas F.Operational Considerations for C/A Code Tracking Errors Due to Cross Correlation[C]∥Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation.Long Beach,CA.2005:1255-1262.
[3]Ganguly S,Bhatia N,Jovancevic A,et al.SelfCalibrating Receivers for Precision Phase Observations[C]∥Proceedings of the 19th International Technical Meeting of the Satellite Division of The Institute of Navigation.Fort Worth,TX.2006:2788-2797.
[4]李星,王飞雪,欧钢,等.卫星导航系统中多址干扰引起的伪码跟踪误差分析[J].信号处理,2008,24(5):885-888.Li Xing,Wang Feixue,Ou Gang,et al.Study on PN Code Tracking Error caused by Multi-user Interference in Satellite Navigation System[J].Signal Processing,2008,24(5):885-888.(in Chinese)
[5]Dierendonck A J V,Fenton P,Hegarty C.Proposed Airport Pseudolite Signal Specification for GPS Precision Approach Local Area Augmentation Systems[C]∥Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation.Kansas City,Missouri.1997:1603-1612.
[6]Yoo K,Kong S-H.PIC technique with reduced complexity in GPS[C]∥IEEE/ION Position,Location and Navigation Symposium,PLANS 2014.Monterey,CA,United states:Institute of Electrical and Electronics Engineers Inc.2014:541-546.
[7]Glennon E P,Dempster A G.Delayed PIC for Postcorrelation Mitigation of Continuous Wave and Multiple Access Interference in GPS Receivers[J].IEEE Transactions on Aerospace and Electronic Systems,2011,47(4):2544-2557.
[8]梁坤,王剑,施浒立.高灵敏度GPS接收机中的互相关减轻算法研究[J].电子学报,2008,36(6):1098-1102.Liang Kun,Wang Jian,Shi Huli.Study on GPS cross correlation mitigation techniques in high sensitivity GPS receivers[J].Acta Electronica Sinica,2008,36(6):1098-1102.(in Chinese)
[9]Shanmugam S K,Navstar.Improving GPS L1 C/A Code Correlation Properties Using a Novel Multi-correlator Differential Detection Technique[C]∥Proceedings of the19th International Technical Meeting of the Satellite Division of the Institute of Navigation.2006:2453-2464.
[10]Tian Y,Liu F,Zeng T.Analysis of Cross Correlation on Code Tracking and Mitigation Techniques using Advanced Correlator[C]∥Proceedings of The Institute of Navigation 2010 International Technical Meeting.San Diego,CA.2010:909-915.
[11]谢钢.GPS原理与接收机设计[M].北京:电子工业出版社,2009:22-26.Xie G.Principles of GPS and Receiver Design[M].Beijing:Publishing House of Electronics Industry,2009:22-26.(in Chinese)
[12]Misra P,Enge P.全球定位系统-信号、测量与性能[M].罗鸣,曹冲,肖雄兵,等,译.(第二版),北京:电子工业出版社,2008:275-279.Misra P,Enge P.GPS Signals,Measurements,and Performance[M].Luo M,Cao C,Xiao X B,et al,translation.(2rd edition),Beijing:Publishing House of Electronics Industry,2008:275-279.(in Chinese)
[13]Madhani P H,Axelrad P,Krumvieda K,et al.Application of Successive Interference Cancellation to the CPS Pseudolite Near-Far Problem[J].IEEE Transactions on Aerospace and Electronic Systems,2003,39(2):481-488.