| 1. | Fast acquisition in pn code receiver with dsp fpga technology
的扩频接收机快捕技术 |
| 2. | Fast acquisition of ds system based on fft
的直扩系统的快捕技术 |
| 3. | The purpose of fast capture is getting the return spread spectrum signals immediately , and then , track channels start tracking and demodulating the signals
快捕用于快速捕获转发返回的扩频信号，信号捕获后由跟踪通道进行跟踪解调。 |
| 4. | It made the case workers not think over and the suspects have no time to appeal to carry out the policy of arresting widely , arresting quickly and executing quickly . 3
二是执行了大捕、快捕、快杀的方针，使办案的人没有考虑的余地，被害者无申诉的时间，铸成无可挽回的错误。 |
| 5. | Wide doppler range . varied code length , varied code rate , which have more difficulties . little acquisition time and high acquisition probability are required during the capturing process of spread spectrum signals
对高动态、高码率、低信噪比、大多普勒及变化的码长和码率的扩频信号的快捕是本文的难点。 |
| 6. | In satellite navigation and positioning system , time is important information for fast and direct acquisition of long cycle code , one of its important aspects is the uncertainty compression of signal ' s propagation delay to reduce time search range
摘要卫星导航定位系统中，辅助长码快捕的一个最重要的信息是时间信息，卫星信号传播时延估计是提供先验时间信息，减少时域搜索范围的一个重要方面。 |
| 7. | Simulation results indicate that the algorithm can reduce the delay ' s uncertainty range greatly , even with great position errors the uncertainty range still can be reduced to the half , and is effective for the fast acquisition of long cycle code
数值计算表明，算法能够大大压缩不同导航星和不同场景用户之间传播时延的不确定范围，即使在用户与卫星位置误差较大的恶劣应用背景下也能将不确定范围压缩一半，从而有效地辅助长码快捕的实现。 |
| 8. | This paper describes a spread spectrum receiver , which is equipment in self - determination outer measuring systems . it consists of two parts : fast capture and track systems . its main function is receiving capture scout demodulation and transmit spread spectrum signal coming from the objects
本论文所研究的扩频接收机是自主外测系统中的关键设备，由快捕和跟踪两部分组成，其主要功能是对来自目标的扩频信号进行接收、捕获、跟踪解调和转发。 |
| 9. | In this thesis , a kind of software method is researched to realize the functions of fast acquisition , tracking and demodulation of pcm - cdma - bpsk intermediate frequency signals . conventional research on spread spectrum signals is in the case of ideal conditions , such as low code rate , narrow dynamic range , narrow frequency - changing range and so on
本论文将介绍一种软件模拟硬件的方法来实现pcm - cdma - bpsk中频信号的快捕、跟踪和解调。关于扩频信号的传统的研究是在理想的条件下，比如低码率、窄动态范围、窄频率变化范围等等。 |
