码相位

一旦完成了对GPS信号的捕获和跟踪处理后，得到码相位、多普勒频率和导航数据信息等观测量。

Once acquisition and tracking is achieved , the code phase , Doppler shift and navigation message can be obtained .

GPS接收机中信号捕获通过粗略调整本地复制信号的码相位和载波频率与卫星信号同步。

In a GPS receiver , the signal acquisition coarsely adjusts the code phase and the carrier frequency of locally generated replicas to align with the corresponding satellite signal .

辅助型GPS接收机中伪码相位延时及其不确定度估计算法研究

Estimate Algorithm for Pseudo-code Phase Delay and its Uncertainty in the Assisted GPS Receiver

基于Logistic函数映射与神经网络的地址码相位捕捉检测方法

Phase Acquisition Method of Address Code Based on Logistic-Map and Neural Network

提出了一种将FFT与循环卷积相结合的算法，可以快速高精度测量GPS信号的C/A码相位。

A method combining FFT and circular convolution proposed could resolve this problem .

FFT与循环卷积相结合的GPS信号C/A码相位测量算法

GPS signal C / A code phase measurement using FFT and circular convolution

直序扩频信号PN码相位的自适应测量算法

Adaptive Algorithm for PN Code Phase Measuring of DS / SS Signals

提出了基于FFT的直序扩频信号PN码相位的自适应测量算法。

An adaptive algorithm based on FFT for PN code phase measuring of DS / SS signals was proposed .

基于小波分析的BOC信号抗多径码相位估计

BOC signal multi-path mitigation technique based on wavelet analysis

同步跟踪则由多径跟踪的结果精确估计PN序列码相位，并实时跟踪信道各径成分由于多普勒效应产生的时延漂移。

Following , code tracking confirm the PN code phase precisely and track every multipath component 's delay drifting due to Doppler effect .

该文提出一种基于直接序列扩频系统（DS／SS）的码相位估计器。

In this paper , a phase estimator of serial search acquisition is proposed for Direct-Sequences Spread-Spectrum ( DS / SS ) systems .

本文基于双线性z变换设计了四阶锁相环，并设计了基于采样预处理的并行码相位捕获方法。

The fourth-order PLL adaptable for high jerk is designed based on the bilinear Z-transform , and the parallel code phase search method based on sample pretreatment is designed .

本文提出一种基于Logistic映射和反向传播神经网络的改进型神经网络检测方法，并将其应用于CDMA移动通信中地址码相位的捕捉。

An improved neural network detection method based on Logistic map and BP ( back propagation ) network is proposed . It can be applied to phase acquisition of CDMA address code .

为了完全捕获到BOC（1,1）信号，从副载波相位和码相位角度出发，提出了一种3路并行捕获方法。

From the sub-carrier phase and code phase viewpoint , an acquisition method with three parallel tags was proposed to acquire the BOC ( 1,1 ) completely .

该方案不仅能够对PN码相位的变化作出调整，同时对PN码多普勒进行跟踪，较适合于测控应答机中PN码跟踪环的应用。

The solution enables not only adjustment of variation of PN code phase , but also tracking of PN code Doppler , making suitable applications of PN code tracking loop in TT & C transponders .

采用基于FFT的并行码相位搜索算法实现快速捕获，在跟踪环采用自适应带宽算法提高PLL的动态跟踪能力。

Signal fast acquisition in the receiver is implemented by a FFT-based parallel code phase search acquisition method . In the tracking loop an adaptive bandwidth PLL algorithm is used to improve dynamic tracking performance .

主要针对目前网络中普遍存在的问题进行理论分析，并提出一些基本措施，如传统的天线调整，以及针对CDMA系统本身的搜索窗、PN短码相位复用模式问题进行了较详细的论述。

The article mainly analyzed the problems in using network and provided some basic methods to solve these problems . For example , the adjustment of the traditional antenna , searching windows of CDMA system , PN short code phase multiple mode .

分析GPS信号的多普勒频率和伪码相位搜索方法、捕获检测器及其参数选择、多普勒频率搜索步长和伪码搜索速率，得到多普勒频率搜索步长为500Hz，伪码搜索速率为475码元/s。

The search method of frequency and code phase , signal detector and parameters select , doppler bin , and code search speed were analyzed . Doppler bin of 500 ? Hz and code search speed of 475 chips / s were obtained .

码相位估计辅助m-序列串行捕获

Serial search acquisition of m-sequences using a phase estimator Assisted examination

数字式电子水准仪的载码相位法原理

Carrier Code Phase Method for Digital Electronic Level

跟踪是精同步，使码相位的误差进一步减小。

Tracking is a fine synchronization , which can further reduced deviation of code phase .

采用窄相关器不仅可以减小码相位跟踪误差，也可以减小载波相位跟踪误差；

A smaller early-late spacing can reduce the tracking errors both of code phase and of carrier phase .

对扩频通信系统的同步来说，一般存在两种不确定的因素，也就是位码相位和多普勒频偏的不确定性。

There are two uncertain factor about it : the phase of the PN code and the Doppler-shift .

考虑多普勒频移的影响采用频率和码相位二维搜索。

Considering the affection of Doppler , the two dimensions searching in both frequency and code phase is applied .

在第四章提出了两种从伪随机二相编码信号衍生出的信号：脉间二元码相位调制信号和随机多元码脉位调制和脉间二相码调制混合信号。

In Chapter 4 , two signals derived from the Binary Pseudo random sequences phase encoding signal are discussed .

本算法理论上可以在40秒的时间内完成单颗卫星整个多普勒频域和所有码相位的搜索，如果在实现中用多路并行通道，这个时间还会大幅减少。

This algorithm implement search with whole Doppler frequency domain and code phase of single satellite in forty seconds theoretically .

这种相关器可以一步搜索到所有可能的码相位偏移，大大提高了捕获速度，比较好地满足了实时处理的要求。

This correlator can search all possible code shifts in one step , so decreases the acquisition time , meets the real-time requirements .

研究了方案实现中的关键技术，包括对上行测距信号伪码相位的精确跟踪和对星上时间的高精度测量。

The key technologies in the scheme , including tacking the pseudo code phase accurately and precise sampling of satellite clock , are studied .

在综合考虑伪码相位误差，多普勒频移和噪声干扰的基础上，详细分析了系统的捕获性能。

The acquisition performance of the system had been analyzed in detail with phase error of PN sequences , Doppler shift and background noise taken into consideration .

通过对信号的捕获，获得视距内可见的卫星信号，并得到载波频率和码相位的粗略估计值。

By means of acquisition to identify all satellites visible to the user , and get a rough estimate value of the carrier frequency and code phase .