[1]刘剑锋,等.一种卫星通信多普勒频偏快速捕获和跟踪算法[J].南京理工大学学报(自然科学版),2009,(03):357-360.
 LIU Jian-feng,DONG Jin-chun,SHEN Lian-feng,et al.Rapid Doppler Frequency Offset Acquisition and Tracking Algorithm of Satellite Communication[J].Journal of Nanjing University of Science and Technology,2009,(03):357-360.
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一种卫星通信多普勒频偏快速捕获和跟踪算法
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
期数:
2009年03期
页码:
357-360
栏目:
出版日期:
2009-06-30

文章信息/Info

Title:
Rapid Doppler Frequency Offset Acquisition and Tracking Algorithm of Satellite Communication
作者:
刘剑锋1 2 董金春2 沈连丰1 庄志洪3
1. 东南大学无线电工程系, 江苏南京210096; 2. 熊猫电子集团博士后工作站, 江苏南京210002; 3. 南京理工大学电子工程与光电技术学院, 江苏南京210094
Author(s):
LIU Jian-feng12DONG Jin-chun2SHEN Lian-feng1ZHUANG Zhi-hong3
1.Department of Radio Engineering,Southeast University,Nanjing 210096,China;2.Postdoctoral Workstation,Panda Electrical Group Ltd.,Nanjing 210002,China;3.School of Electronic Engineering and Optoelectronic Technology,NUST,Nanjing 210094,China
关键词:
信号接收机 通信卫星 多普勒效应 频移 自回归模型 卡尔曼滤波
Keywords:
signal receivers communication satellites Doppler effect frequency shift autoregressive models Kalman filters
分类号:
TN927.2
摘要:
为降低Ka频段卫星移动通信中的信道误码率,该文基于π/4-DQPSK调制方式推导了一种多普勒频偏的捕获方法。在跟踪阶段利用自回归模型对有色噪声建模,并利用卡尔曼算法对噪声进行滤波。仿真结果表明:随着时间的推移,参数估计值与实际值之间的误差均方值越来越小,且噪声模型的参数在很短的时间内就达到较高的估计精度;在多普勒频偏跟踪阶段,随着跟踪时间的加长,多普勒频偏的估计值逐渐收敛到理论值;该文提出的多普勒频偏跟踪算法切实可行,卡尔曼算法保证了跟踪阶段频偏估计值的稳态收敛。
Abstract:
In order to reduce the channel error rate of Ka-band mobile satellite communication system,the paper deduces a method of rapid Doppler frequency offset acquisition on the basis of π/4-DQPSK modulation.In the tracking phase,an autoregressive model is used to establish the mode of colored noise,and the Kalman algorithm is used to filter it.The simulation results show that the mean-square value between the estimated value and practical value becomes smaller along with the time and the parameters of the noise mode reaching high precision in a short time.In the Doppler frequency offset tracking,the estimated value converges to the theoretical value along with tracking time.The Doppler frequency offset tracking algorithm put forward here is feasible and the Kalman algorithm ensures the estimated value converges reliably in the period of the tracking phase.

参考文献/References:

[ 1] 张更新, 张杭. 卫星移动通信系统[M ]. 北京: 人民邮电出版社, 2001.
[ 2] G leason S, H odgart S, Sun Y ip ing, et a.l Detection and processing of bistatica lly re flected GPS signa ls from low earth orb it for the purpose o f ocean rem ote sensing[ J]. IEEE Trans on Geosciences and Rem ote Sensing, 2005, 43( 6): 1229- 1241.
[ 3] 赵杭生, 甘仲民, 屈德新. P /4-DQPSK 调制的快速位同步捕获和位同步跟踪[ J]. 电子学报, 1999, 27 ( 4): 24- 27.
[ 4] Baykut S, Akgul T, E rg intav S. GPS data m ode ling and GPS no ise analysis[ J]. 14th IEEE S igna l Processing and Communications Applications, 2006 ( 3): 1- 4.
[ 5] Le i J, Ng T S. A non-da ta-a ided and non-phase-based AFC m ethod forM PSK DS /CDMA transce ivers used in dig ital broadcasting[ J]. IEEE Trans on Broadcasting, 2003, 49( 4) : 335- 343.
[ 6] 朱爱民, 杨喜根, 单超. 一种基于AR模型的大频偏估计算法[ J]. 系统仿真学报, 2006, 18 ( 1 ): 37 - 40.
[ 7] Zhao L inha,i Xu Xun, Ji Na. A fast dem odulating me thod for frequency sh ift signal based on frac tal box dim ensions theory [ J]. Inte rnational Symposium on M icrow ave, Antenna, Propag ation and EMC Techno log ies fo r W ire less Comm un ications, 2007, 3: 1027 - 1030.
[ 8] M cGu ire M, S im a M. Low-order Ka lm an filters for channel estim ation[ J]. IEEE Pacific R im Conference on Comm un ica tions, Compu ters and Signa l Processing, 2005( 8): 352- 355.
[ 9] X iong Shenshu, Zhou Zhaoy ing. Neura l filter ing o f co lo red no ise based on Ka lm an filter structure [ J]. IEEE Trans on Instrum en tation and M easurem ent, 2003, 52( 3): 742- 747.

备注/Memo

备注/Memo:
作者简介: 刘剑锋( 1977- ) , 男, 博士生, 高级工程师, 主要研究方向: 移动卫星通信、调制解调技术, E-m ail:ljf_ 99@ 163. com;
通讯作者: 沈连丰( 1952 - ), 男, 教授, 博士生导师, 主要研究方向: 无线通信与信号处理, E-mail: lfshen@ seu. edu. cn。
更新日期/Last Update: 2012-11-19