PN码相位精确测量的累加最小二乘法

张波; 郭英; 齐子森; 张东伟; 张坤峰

doi:10.13700/j.bh.1001-5965.2015.0620

PN码相位精确测量的累加最小二乘法

doi: 10.13700/j.bh.1001-5965.2015.0620

张波^1,2,
郭英^1,3, ,,
齐子森¹,
张东伟¹,
张坤峰¹

1.
空军工程大学信息与导航学院, 西安 710077
2. 空军航空大学信息对抗系, 长春 130022
3. 通信网信息传输与分发技术重点实验室, 石家庄 050081

基金项目: 航空科学基金（20112096016）；通信网信息传输与分发技术重点实验室开放课题（ITD-U12003/K1260009）

详细信息

作者简介:
张波,男,博士研究生,助教。主要研究方向:软件无线电、同步技术。Tel.:0431-86958347,E-mail:bo_zhang0106@126.com;郭英,女,博士,教授,博士生导师。主要研究方向:通信信号处理、语音信号处理。Tel.:029-84791773,E-mail:guoying_dsp@sina.com

通讯作者:
郭英,Tel.:029-84791773,E-mail:guoying_dsp@sina.com

中图分类号: TN914.42
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- 被引次数: 0
出版历程
- 收稿日期: 2015-09-22
- 网络出版日期: 2016-10-20

Precise measurement of PN code phase by accumulative least square method

1.
Information and Navigation College, Air Force Engineering University, Xi'an 710077, China
2. Information Countermeasure Department, Aviation University of Air Force, Changchun 130022, China
3. Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory, Shijiazhuang 050081, China

Funds: Aeronautical Science Foundation of China (20112096016); Foundation of the Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory (ITD-U12003/K1260009)

摘要

摘要: 利用最小二乘（LS）法可以实现PN码相位的精确测量，但该方法对粗同步要求高，难以满足实际工程需求。给出了一种新的累加LS法的实现结构，在该结构下根据鉴相曲线的波形变化特征，利用累加后的离散鉴相曲线的最大值和最小值点作为特征基准点，取最值之间的数据进行LS线性拟合，实现粗同步于半个码元宽度以内的伪码相位精确测量。理论分析表明，该方法的鉴相特性呈线性特征，可以有效使用累加LS线性拟合方法。仿真结果表明，该方法相比于其他方法使用范围更广，测量精度更高。
- 直序扩频(DSSS)信号 /
- PN码 /
- 精确测量 /
- 最小二乘(LS)法 /
- 鉴相曲线
Abstract: As least square (LS) method, which is applied to precise measurement of PN sequence phase in high-accuracy, is limited in narrow range condition of coarse synchronization, it is difficult to satisfy the needs of practical project. A novel realized structure of accumulative LS method for PN sequence phase measurement is presented. According to the characteristic of phase discrimination curve, the accumulative maximal value and minimal value of the phase discrimination curve are viewed as the characteristic reference position, and the samples between the maximal value and the minimal value are fitted by LS method. A high-accuracy measurement of the PN sequence phase can be achieved in half-width of the chips under the condition of coarse synchronization. It is proved that the characteristic of phase discrimination is linear in theory, and can use accumulative LS method suitably. The simulation results indicate that the proposed method has wider range of coarse synchronization and higher measurement precision.
- direct sequence spread spectrum (DSSS) signal /
- PN code /
- precise measurement /
- least square (LS) method /
- phase discrimination curve

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参考文献(16)

[1]	沈锋,李伟东,李强.基于I/Q支路相干积分观测滤波的GPS接收机信号跟踪方法[J].电子与信息学报,2015,31(1):37-42.SHEN F,LI W D,LI Q.GPS receiver signal tracking method based on I/Q branch coherent integration measurements filter[J].Journal of Electronics & Information Technology,2015,31(1):37-42(in Chinese).
[2]	程俊仁,刘光斌,姚志成,等.一种鲁棒GNSS矢量跟踪环[J].航空学报,2014,35(11):3106-3114.CHENG J R,LIU G B,YAO Z C,et al.A robust GNSS vector tracking loop[J].Acta Aeronautica et Astronautica Sinica,2014,35(11):3106-3114(in Chinese).
[3]	刘晗超,简伟,侯建文.再生伪码测距中的码跟踪环实现[J].时间频率学报,2014,37(2):104-110.LIU H C,JIAN W,HOU J W.A realization of code tracking loop in PN code ranging[J].Journal of Time and Frequency,2014,37(2):104-110(in Chinese).
[4]	KRASNR R,NORMAN F.GPS receiver and method for processing GPS signals:United States,Patent 6725159[P].2004-04-20.
[5]	FRANCESCO B,GAETANO G.A fast time-delay estimator of PN signals[J].IEEE Transactions on Communications,2011,59(8):2057-2062.
[6]	龚国辉,李思昆.提高DSSS信号PN码相位测量精度的三点二次插值法[J].通信学报,2007,28(2):130-133.GONG G H,LI S K.Improving DSSS signal PN code phase measurement precision by 3-point quadratic interpolation[J].Journal on Communications,2007,28(2):130-133(in Chinese).
[7]	王磊,徐大专.一种抗频偏的时间精同步方法及性能分析[J].电子与信息学报,2011,33(2):300-303.WANG L,XU D Z.An anti frequency offset fine time synchronization method and its performance analysis[J].Journal of Electronics & Information Technology,2011,33(2):300-303(in Chinese).
[8]	李柏渝,陈雷,李彩华,等.通道非理想特性对导航接收机伪码测距零值的影响分析[J].电子与信息学报,2011,33(9):2138-2143.LI B Y,CHEN L,LI C H,et al.The impact non-ideal-front-end characteristic on PN zero value measurement of navigation receivers[J].Journal of Electronics & Information Technology,2011,33(9):2138-2143(in Chinese).
[9]	罗海军,彭卫东,李明阳,等.基于分段直线拟合的伪随机码相位测量法[J].计算机测量与控制,2015,23(3):727-730.LUO H J,PENG W D,LI M Y,et al.Method of phase measurement of PN codes based on piecewise linear fitting[J].Computer Measurement & Control,2015,23(3):727-730(in Chinese).
[10]	胡修林,张俊,杨灵.直接序列扩频通信系统中PN码相位的精确测量方法[J].电讯技术,2005(4):128-131.HU X L,ZHANG J,YANG L.A method for accurately measuring the phase of PN code in DSSS systems[J].Telecommunication Technology,2005(4):128-131(in Chinese).
[11]	胡修林,曾臻,张俊,等.直扩系统伪码精同步及FPGA实现[J].华中科技大学学报(自然科学版),2005,33(6):44-46.HU X L,ZENG Z,ZHANG J,et al.Synchronization of pseudorandom code and its implementation on FPGA in DSSS[J].Journal of Huazhong University of Science & Technology (Nature Science Edition),2005,33(6):44-46(in Chinese).
[12]	王徐华,柏鹏,李明阳,等.基于最小二乘法的高动态条件下抗频偏的精确同步方法[J].电子与信息学报,2012,34(11):2755-2760.WANG X H,BAI P,LI M Y,et al.Anti-frequency offset method for precision synchronization on highly dynamic condition based on the least squares[J].Journal of Electronics & Information Technology,2012,34(11):2755-2760(in Chinese).
[13]	王徐华,柏鹏,李寰宇,等.基于多速率内插和最小二乘法的精确同步方法[J].计算机应用研究,2012,29(10):3922-3925.WANG X H,BAI P,LI H Y,et al.Precise synchronization approach based on multi-rate interpolation and least squares method[J].Application Research of Computers,2012,29(10):3922-3925(in Chinese).
[14]	王徐华,柏鹏,李明阳,等.一种基于滑动最小二乘法的精确同步方法[J].重庆邮电大学学报(自然科学版),2013,25(5):599-604.WANG X H,BAI P,LI M Y,et al.A precise synchronization method based on slipping least square algorithm[J].Journal of Chongqing University of Posts and Telecommunications (Natural Science Edition),2013,25(5):599-604(in Chinese).
[15]	李明阳,柏鹏,王徐华,等.一种基于迭代最小二乘法的精确同步方法[J].电子与信息学报,2013,35(4):832-837.LI M Y,BAI P,WANG X H,et al.A precise synchronization method based on iterative least square algorithm[J].Journal of Electronics & Information Technology,2013,35(4):832-837(in Chinese).
[16]	罗海军,彭卫东.整体最小二乘法在精同步中的应用[J].计算机测量与控制,2014,22(7):2291-2294.LUO H J,PENG W D.Application of total least squares in precise synchronization[J].Computer Measurement & Control,2014,22(7):2291-2294(in Chinese).