公开(公告)号：US20150091754A1

公开(公告)日：2015-04-02

申请号：US14058165

申请日：2013-10-18

Applicant: Broadcom Corporation

Inventor： Jaleh KOMAILI ,  Charles NORMAN ,  Andreas WARLOE

IPC: H04B1/7085 ,  G01S19/30 ,  H04B1/7093

CPC classification number: H04B1/7085 ,  G01S19/30 ,  H04B1/7095 ,  H04B2001/70706 ,  H04B2201/70715

Abstract: A method of tracking a code phase includes configuring local correlators with a first de-spreading local function; de-spreading an incoming signal with the first de-spreading local function to generate a first correlation output; determining a range estimate based on the first de-spreading local function; reconfiguring the local correlators with a second de-spreading local function when a delay-locked loop has locked to a correct correlation peak of the first correlation output; de-spreading the incoming signal with the second de-spreading local function to generate a second correlation output; determining a range estimate based on the second de-spreading local function that has a higher resolution than the range estimate based on the first de-spreading local function; and determining if the delay-locked loop has lost a lock to the correct correlation peak of the second correlation output to determine that the local correlators need to be reconfigured with the first de-spreading local function.

Abstract translation: 跟踪码相位的方法包括：配置具有第一解扩局部函数的局部相关器; 用第一解扩局部函数对输入信号进行解扩，以产生第一相关输出; 基于所述第一解扩局部函数确定范围估计; 当延迟锁定环已经锁定到第一相关输出的正确相关峰值时，用第二解扩局部函数重配置局部相关器; 用第二去扩展局部函数对输入信号进行解扩，以产生第二相关输出; 基于所述第二去扩展局部函数，基于所述第一解扩局部函数，确定具有比所述范围估计高的分辨率的所述第二解扩局部函数的范围估计; 以及确定所述延迟锁定环路是否已经失去对所述第二相关输出的正确相关峰值的锁定，以确定所述局部相关器需要利用所述第一解扩局部功能重新配置。