首页 | 本学科首页   官方微博 | 高级检索  
   检索      

数据和导频通道的功率加权联合捕获算法
引用本文:田丰,唐小妹,欧钢.数据和导频通道的功率加权联合捕获算法[J].国防科技大学学报,2016,38(2):112-116.
作者姓名:田丰  唐小妹  欧钢
作者单位:国防科技大学 电子科学与工程学院,国防科技大学 电子科学与工程学院,国防科技大学 电子科学与工程学院
基金项目:基于可变带宽激励信号族优化设计的广义群时延测量方法
摘    要:下一代全球导航卫星系统将采用数据和导频通道功率不等的调制方式,而传统算法多采用数据和导频通道的等权重加权联合进行捕获。当二者功率不相等时,等权重加权联合不能获得最优的捕获性能。因此提出功率加权联合的改进捕获算法,在数据和导频通道的功率分配不等的情况下,进行不同加权系数的联合捕获,并且利用最小二乘的方法进行最优加权系数的拟合估计。利用捕获判决量的特征函数推导检测和虚警概率。仿真实验验证了当数据和导频功率比为1∶3、检测概率为0.8、虚警概率为10-3时,所提出的改进算法能提升0.4 d B的捕获灵敏度。

关 键 词:非相干  联合捕获  导频通道  加权系数  特征函数
收稿时间:4/7/2015 12:00:00 AM

The Power-Weighted Combing Acquisition Algorithm with Data and Pilot Signals
TIAN Feng,TANG Xiaomei and OU Gang.The Power-Weighted Combing Acquisition Algorithm with Data and Pilot Signals[J].Journal of National University of Defense Technology,2016,38(2):112-116.
Authors:TIAN Feng  TANG Xiaomei and OU Gang
Institution:School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China,School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China and School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
Abstract:The modulation with different power of data and pilot channels will be used in the next generation Global Navigation Satellite Systems (GNSS). However, the traditional acquisition algorithms are mostly designed with equal-weighted coefficient of data and pilot channels. Unfortunately, when the power of data and pilot channels are not equal, the traditional algorithms are not suitable for optimizing the performance. The paper proposes a power-weighted combing acquisition algorithm, which uses the different weighted coefficients for data and pilot channels. And uses the Least-Square fitting method to optimize the coefficients. The detection and false-alarm probabilities are derived with characteristic function of decision variable. The simulations prove that the acquisition threshold of the algorithm is improved 0.4 dB, when the power ratio of data and pilot channels is 1:3, and the detection and false-alarm probabilities are 0.8 and 10-3, respectively.
Keywords:combing acquisition  pilot channel  weighted coefficient  characteristic function
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《国防科技大学学报》浏览原始摘要信息
点击此处可从《国防科技大学学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号