[1]胡锐,薛晓中,孙瑞胜,等.基于DSP+FPGA的高动态GPS信号载波环路设计[J].南京理工大学学报(自然科学版),2010,(01):75-79.
 HU Rui,XUE Xiao-zhong,SUN Rui-sheng,et al.Carrier Loop Design for High-dynamic GPS Signal Based on DSP+FPGA[J].Journal of Nanjing University of Science and Technology,2010,(01):75-79.
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基于DSP+FPGA的高动态GPS信号载波环路设计
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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:
2010年01期
页码:
75-79
栏目:
出版日期:
2010-02-28

文章信息/Info

Title:
Carrier Loop Design for High-dynamic GPS Signal Based on DSP+FPGA
作者:
胡锐;薛晓中;孙瑞胜;段笑菊;
南京理工大学动力工程学院
Author(s):
HU RuiXUE Xiao-zhongSUN Rui-shengDUAN Xiao-ju
School of Power Engineering,NUST,Nanjing 210094,China
关键词:
高动态 全球定位系统信号 载波捕获 载波跟踪 频率锁定环路 Costas-PLL
Keywords:
high dynamics global positioing system signals carrier acquisition carrier tracking frequency locked loop Costas-phase lock loop
分类号:
TN914.42
摘要:
为了提高动态环境下捕获、跟踪GPS信号的环路性能,通过分析环路逻辑时序、参数和高动态下多普勒频移的变化特性,使用高阶、宽带宽的跟踪环路,设计了一种基于DSP+FPGA的载波捕获、跟踪方法。利用现场可编程门阵列(FPGA)对信号进行傅里叶变换,实现载波的快速初捕和二次精捕,同时利用数字信号处理器(DSP)实现具有自动调整功能的二阶频率锁定环路的辅助三阶Costas-PLL载波跟踪环,使得环路具有抗高动态性能的同时仍拥有较高的跟踪精度。仿真实验表明:该方案能实现高动态下载波信号的快速捕获与精确跟踪。
Abstract:
In order to improve GPS signal’s acquisition,tracking performance in a high dynamic environment,the sequential logic,loop parameters and high dynamic changes under the Doppler frequency shift are analysed.The wide bandwidth and high-order tracking loop is used.A loop to carrier acquisition and tracking is designed based on DSP+FPGA.By signal’s Fourier transform,field programmable gate array(FPGA) is used to complete fast carrier first capture and second precise acquisition,while digital signal processor(DSP) is used to realize an automatically adjusted second-order FLL-assisted third-order Costas-PLL which makes the loop have the anti-high dynamic performance and still have a high tracking accuracy.Simulation results show that the design can achieve GPS carrier’s fast acquisition and accurate tracking in high dynamic environment.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目: 国家863计划资助项目( 2009AA12Z321)作者简介: 胡锐( 1983- ), 男, 博士生, 主要研究方向: GPS接收机设计、GPS /SINS组合导航, Em a il: huru i34@gm a il. com; 通讯作者: 薛晓中( 1945- ), 男, 教授, 主要研究方向: 弹箭精确化, 导航、制导与控制, Ema il: n just_xuex iaozhong@ yahoo. com. cn。
更新日期/Last Update: 2012-11-02