一种DSSS系统自适应门限分析模型
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摘要
自适应门限是影响直接序列扩频(DSSS)系统平均捕获时间的关键因素。为达到降低DSSS系统平均捕获时间的目的,文中通过深入分析非相干累加与虚警概率、检测概率、平均捕获时间的关系,建立了一种DSSS系统自适应门限分析模型。仿真结果表明,该分析模型可通过自适应门限阈值来有效降低DSSS系统的平均捕获时间,进而为工程应用中的门限自适应提供理论依据。
The adaptive threshold is one of the key factors influenceing the mean acquisition time.In order to decrease the mean acquisition time,an adaptive threshold analysis model was established by analizing the relationships among non coherent accumulation,false alarm probability,detection probability and mean acquisition time.Simulation result shows that using the analysis model to adjust the adaptive threshold was an effective mehtod to decrease the mean acquisiton time,which could provide theoretical basis for engineering application.
The adaptive threshold is one of the key factors influenceing the mean acquisition time.In order to decrease the mean acquisition time,an adaptive threshold analysis model was established by analizing the relationships among non coherent accumulation,false alarm probability,detection probability and mean acquisition time.Simulation result shows that using the analysis model to adjust the adaptive threshold was an effective mehtod to decrease the mean acquisiton time,which could provide theoretical basis for engineering application.
引文
[1]DAI Weihua,QIAO Chunjie,WANG Yueke,et al.Improved anti-jamming scheme for direct-sequence spreadspectrum receivers[J].Electronics letters,2016,52(2):161-163.
[2]KIM C J,LEE H J,LEE H S.Adaptive acquisition of PN sequences for DSSS communications[J].IEEE Transactions on Communications,1998,46(8):993-996.
[3]NIR Le V,SCHEERS B.Robust blind carrier frequency synchronization for direct sequence spread spectrum systems[J].Electronics letters,2015,51(5):425-427
[4]KIM C J.Adaptive acquisition of PN code in multipath fading mobile channels[J].Electronics Letters,2002,38(2):135-137.
[5]HAN Yu,JIA Guozhu.Adaptive acquisition threshold algorithm based on mean energy[C]//2013 Third International Conference on Instrumentation,Measurement,Computer,Communication and Control(IMCCC).[S.l.:s.n.],2013.634-637.
[6]吴玉成,陈宁,高珊.突发通信中的自适应门限信号检测方法[J].电子与信息学报,2007,29(12):2896-2898.
[7]安勇,牟荣增,阎跃鹏.自适应非相干累加次数和门限的捕获策略研究[J].系统仿真学报,2011,23(4):817-820.
[8]VITERBI A J,CDMA:principles of spread spectrum communication[M].MA:Addison Wesley,1995:366-368.
[9]YEOM Soonam,JUNG Yunho,LEE Seongjoo.An adaptive threshold technique for fast PN code acquisition in DSSS systems[J].IEEE Transaction on Vehicular Technology,2011,60(6):2870-2874.
[10]薛巍,向敬成,周治中.一种PN码捕获的门限自适应估计方法[J].电子学报,2003,31(12):1870-1873.
[11]田日才,迟永刚.扩频通信[M].北京:清华大学出版社,2014:176-182.
[12]付文君,姜景山,王拴荣,等.QPSK数字接收机中的SNR估计的新方法[J].电子与信息学报,2007,29(2):255-259.
[13]吴玉成,陈婷婷.在滑动窗口中判决的自适应门限检测方法[J].系统仿真学报,2008,20(10):2770-2773.
[2]KIM C J,LEE H J,LEE H S.Adaptive acquisition of PN sequences for DSSS communications[J].IEEE Transactions on Communications,1998,46(8):993-996.
[3]NIR Le V,SCHEERS B.Robust blind carrier frequency synchronization for direct sequence spread spectrum systems[J].Electronics letters,2015,51(5):425-427
[4]KIM C J.Adaptive acquisition of PN code in multipath fading mobile channels[J].Electronics Letters,2002,38(2):135-137.
[5]HAN Yu,JIA Guozhu.Adaptive acquisition threshold algorithm based on mean energy[C]//2013 Third International Conference on Instrumentation,Measurement,Computer,Communication and Control(IMCCC).[S.l.:s.n.],2013.634-637.
[6]吴玉成,陈宁,高珊.突发通信中的自适应门限信号检测方法[J].电子与信息学报,2007,29(12):2896-2898.
[7]安勇,牟荣增,阎跃鹏.自适应非相干累加次数和门限的捕获策略研究[J].系统仿真学报,2011,23(4):817-820.
[8]VITERBI A J,CDMA:principles of spread spectrum communication[M].MA:Addison Wesley,1995:366-368.
[9]YEOM Soonam,JUNG Yunho,LEE Seongjoo.An adaptive threshold technique for fast PN code acquisition in DSSS systems[J].IEEE Transaction on Vehicular Technology,2011,60(6):2870-2874.
[10]薛巍,向敬成,周治中.一种PN码捕获的门限自适应估计方法[J].电子学报,2003,31(12):1870-1873.
[11]田日才,迟永刚.扩频通信[M].北京:清华大学出版社,2014:176-182.
[12]付文君,姜景山,王拴荣,等.QPSK数字接收机中的SNR估计的新方法[J].电子与信息学报,2007,29(2):255-259.
[13]吴玉成,陈婷婷.在滑动窗口中判决的自适应门限检测方法[J].系统仿真学报,2008,20(10):2770-2773.