多普勒频移补偿：大的多普勒频移会引起载波同步及伪码捕获性能的下降。
Doppler compensation techniques: the large Doppler frequency offset can case the performance degraded in PN and carrier synchronizing.
讨论了高动态、低信噪比、长伪码序列扩频信号的伪码捕获、跟踪、载波跟踪与数据解调方法。
The paper discusses the acquisition and tracking of the PN code and the tracking of the carrier in high dynamic range , low SNR and long PN code.
介绍了一种分段极性相关的方法，并将其应用于DS -BPS K信号的多个参数估计和伪码捕获。
A new method called subsection polar correlation is introduced and then is used in estimation of several DS-BPSK signal parameters and in PN acquisition.
本文针对新型的卫星用接收机伪码捕获的性能指标要求 ，设计了一种基于中频直接采样数字化的伪码捕获算法。
The problem of PN code acquisition is the key technique in DSSS receiver when there are narrowband interferences in the received signal.
针对大频偏下高动态直扩接收机伪码捕获时间长的问题，提出了一种新的基于FFT相位精确估计频偏的改进方法。
A new code acquisition method based on phase difference correction of FFT is presented to solve the problem of long code acquisition time in high dynamic DSSS receivers having large frequency offset.
提出一种适合突发短帧模式的自适应伪码捕获方法，该方法可适用于A/D转换前加自动增益控制（AGC）的情况。
So an adaptive acquisition algorithm of PN codes for burst short frames is presented. The algorithm is suitable for the condition that AGC is applied before the ADC.
提出了一种混合多址系统伪码捕获的实现结构，并且与几种经典结果进行了性能比较，结果表明这种方法具有一定优越性。
This paper introduces the realization of a PN acquisition scheme in burst DSSS communication, which is compared with traditional classical methods and attains a better result.
设计在高动态环境下工作的GPS接收机，其难点之一便在于对卫星伪码的快速捕获。
To design the GPS receiver working in high dynamic circumstance, the first problem to be settled is how to catch the PN code of the satellite.
文中提出了一种基于FPGA的扩频信号快速滑动相关捕获方法，来解决低信噪比条件下长伪码序列的捕获问题。
The paper presents a spread spectrum signal acquisition speed sliding correlation method base on FPGA, to address the problem of capture long PN code under low SNR.
接收机采用了匹配滤波器同步捕获法和包络相关同步跟踪环来实现伪码(PN)的同步。
A synchronous capture method of adaptation filter and related synchronous envelope tracking circle were applied to achieve synchronization of PN by receiver.
设计在高动态环境下工作的GPS接收机，其难点之一在于对卫星伪码的快速捕获。
One of the difficulties of designing GPS receiver working under high dynamic circumstance is to fast acquire the satellite PN code.
分析表明，本文提出的伪码序列捕获系统具有检测概率高、虚警概率低和平均捕获时间短的特点。
According to the result of the analysis, the designed digital code acquisition system has higher probability of detection, lower probability of false alarm and shorter average acquisition time.
针对具有大多普勒偏移的直接序列扩频信号捕获问题，提出一种基于快速傅里叶变换(FFT)的多普勒和伪码分别并行搜索的捕获新方法。
Aiming at the acquisition problem of direct sequence spread-spectrum (DSSS) signals with large Doppler offset, a new method based on fast Fourier transform (FFT) is proposed.
采用滑动相关捕获和延迟锁定环实现伪码的同步、捕获和跟踪；
Slip correlative taking and delay locked loop are used for the synchronization, taking, locking of PN code.
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.
针对扩频通信系统中的伪码同步问题，分析了基于匹配滤波捕获跟踪算法的伪码数字化同步方案。
In consideration of the synchronization of PN code in spread spectrum communication system, a acquisition and track scheme of PN code based on the theory of match filter is analyzed.
本文的第三章重点针对伪码的捕获提出了以流水线方式实现的改进的匹配滤波方法。
In the third chapter, this thesis mainly raises the pipeline method for the Digital Match Filter improvement which is used for pseudo code's capture.
其中，伪码同步模块主要分为捕获和跟踪两个部分。
The most important module is the pseudo code synchronous module. The process has two parts:capture and track.
其次，介绍了几种常用的伪随机码捕获方法及不适合于P码直接快速捕获的原因。
Secondly, this thesis introduces several conventional code acquisition methods and the reason why they are not fit for direct P-code acquisition.
该捕获方法在捕获到同步长周期伪码的同时，也得到了多普勒频偏值的近似值。
Using this method, the synchronized PN code phase and approximation value of Doppler shift are got.
该捕获方法在捕获到同步长周期伪码的同时，也得到了多普勒频偏值的近似值。
Using this method, the synchronized PN code phase and approximation value of Doppler shift are got.
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