| 基于分段相关－视频积累方法的多驻留伪码捕获系统优化设计 |
| |
| 引用本文： | 朱祥维,王飞雪.基于分段相关－视频积累方法的多驻留伪码捕获系统优化设计[J].通信学报,2006,27(9):124-128. |
| |
| 作者姓名： | 朱祥维 王飞雪 |
| |
| 作者单位： | 国防科技大学,电子科学与工程学院卫星导航研发中心,湖南,长沙,410073 |
| |
| 基金项目： | 国防科技预研基金;教育部跨世纪优秀人才培养计划 |
| |
| 摘 要： | 针对载波多普勒下的伪码捕获问题,分析了基于分段相关-视频积累方法的多驻留伪码捕获系统的最优性能。推导了正交双通道检测器的检测概率和虚警概率表达式,给出了多驻留系统的捕获时间均值表达式;通过采用遗传算法对系统进行优化设计,增大了系统的多普勒容限,降低了捕获时间;分析了驻留级数、多普勒和载噪比等对捕获系统性能的影响。研究成果可用于指导扩频系统接收机伪码捕获模块的设计。
|
| 关 键 词： | 扩频 伪码捕获 多普勒 多驻留 遗传算法 |
| 文章编号： | 1000-436X（2006）09-0124-05 |
| 收稿时间： | 2005-09-15 |
| 修稿时间： | 2006-05-10 |
Optimum design of multiple dwell PN code acquisition system using segment correlation-video integration method |
| |
| ZHU Xiang-wei,WANG Fei-xue.Optimum design of multiple dwell PN code acquisition system using segment correlation-video integration method[J].Journal on Communications,2006,27(9):124-128. |
| |
| Authors: | ZHU Xiang-wei WANG Fei-xue |
| |
| Abstract: | The multiple dwell serial search technique could reduce PN code acquisition time. A multiple dwell PN code acquisition system using segment correlation-video integration method was presented to deal with carrier Doppler. Detec-tion probability and false alarm probability formulas of the I-Q detector were derived, and mean acquisition time formula was also given. Based on this, the multiple dwell code acquisition system was optimized using genetic algorithm, which improved the performance by increasing the Doppler bin. The influence of dwell number, carrier Doppler and the ratio of carrier power to noise power density has been vanalyzed. The results can be used in code acquisition module of spread spectrum system receiver. |
| |
| Keywords: | spread spectrum code acquisition Doppler multiple dwell genetic algorithm |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《通信学报》浏览原始摘要信息 |
|
点击此处可从《通信学报》下载全文 |
