第七章 GPS信号的捕获与跟踪.ppt

San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * * 锁相环 * 滤波器前的鉴相器输出 * 滤波器后的鉴相器输出 * 环路滤波器和VCO的传递函数 环路传递函数 二阶锁相环的特性 * 自然频率 阻尼系数 二阶锁相环的特性 * 噪声带宽 自然频率与噪声带宽的关系 二阶锁相环的特性 * 阻尼系数 * 噪声带宽 * School of Electronic Engineering Frequency offsets is 20 Hz * School of Electronic Engineering * School of Electronic Engineering * Code Tracking: Three local codes are generated and correlated with the incoming signal 码跟踪环-延迟锁定环 * 码跟踪环-延迟锁定环 * 延迟锁定环基本结构 * 码跟踪环结构 * School of Electronic Engineering * School of Electronic Engineering * School of Electronic Engineering * School of Electronic Engineering * School of Electronic Engineering * School of Electronic Engineering * 码相位鉴别器 * 鉴别器输出与码元差的关系曲线 * GPS接收机的跟踪环 San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * San Salvador * Page No. * * GPS信号捕获与跟踪 GPS信号的组成 GPS信号捕获的