| GPS接收机中相位舍位噪声影响DDL的跟踪性能 | |
| 李蝉 ; 崔晓伟 ; 李国民 ; 陆明泉 ; 冯振明 ; LI Chan ; CUI Xiaowei ; LI Guoming ; LU Mingquan ; FENG Zhenming | |
| 2010-05-12 ; 2010-05-12 | |
| 关键词 | 卫星导航接收机 数字延迟锁定环(DDL) 相位舍位噪声 数字中频 采样 satellite navigation receiver digital delay-locked loop(DDL) phase truncation noise digital intermediate frequency sampling P228.4 |
| 其他题名 | Influence of phase truncation noise on GPS digital delay-locked loop(DLL) tracking performance |
| 中文摘要 | 为了解决在全球卫星定位系统(GPS)接收机中出现的阶梯状伪距测量结果的问题,在分析了接收机中伪码跟踪原理的基础上,找到了造成该问题的原因。通过研究数控振荡器(NCO)中相位舍位噪声的规律,得到了该噪声与数字中频采样率的关系,提出了基于减小相位舍位噪声的中频采样率优化方案。仿真结果显示:选择高于且接近伪码速率整数倍的中频采样率能明显的抑止NCO相位舍位噪声。优选出的高分辨率、低漂移的数字中频采样率可以有效提高GPS接收机的跟踪精度。; A method is presented to reduce the noise in pseudo-range measurements by global positioning system(GPS) receivers.The phase truncation noise was found to be related to the intermediate frequency sampling rate.The intermediate frequency sampling rate was then optimized to reduce the noise.Simulations show that intermediate frequency sampling rates that are higher and nearer than an integer multiple of the pseudo-code rate will minimize the noise.The high resolution,low phase drift optimized intermediate frequency sampling rate improves the tracking accuracy in GPS receivers. |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/28055]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 李蝉,崔晓伟,李国民,等. GPS接收机中相位舍位噪声影响DDL的跟踪性能[J],2010, 2010. |
| APA | 李蝉.,崔晓伟.,李国民.,陆明泉.,冯振明.,...&FENG Zhenming.(2010).GPS接收机中相位舍位噪声影响DDL的跟踪性能.. |
| MLA | 李蝉,et al."GPS接收机中相位舍位噪声影响DDL的跟踪性能".(2010). |
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