Cdma基带算法仿真研究-高精度高精度伪码跟踪
摘 要
仿真定义为“通过对系统模型的试验去研究一个存在的或是设计中的系统”。仿真技术的主要优势在于与大多数技术相比,它更简单,运作起来不昂贵,而且更灵活。基于计算机的仿真技术,不但能提高效率,缩短研究开发周期,不受环境及气候限制,而且对保证安全、节约开支、提高质量尤其具有突出的功效。随着计算机技术、系统工程与科学的迅速发展,仿真技术也得到了很大的发展,而且在武器系统设计中得到了广泛的应用。在引信系统的规划、设计、运行、分析及改造的各个阶段,仿真技术都可以发挥重要作用。采用MATLAB Simulink对伪随机码跟踪仿真,有利于提高伪随机码跟踪设计的效率。本设计所使用的MATLAB Simulink是一款针对通信系统、信号处理系统的仿真而设计的软件,它能非常方便、高效地对各类通信系统仿真。
关键词: 仿真 MATLAB Simulink 信号处理
Abstract
Simulation defined as "passed the test of the system model to study the existence of one or the design of the system". The major advantage of simulation technology is ,compared with most the other technologies, it is more simple, not expensive to operate and more flexible. Computer-based simulation technology, not only to improve efficiency,and to reduce research and development cycle, which can be out of the environment and climate restrictions, but also to ensure safety, reduce expenditure, improve the quality highlighted the particular effectiveness. With computer technology, systems engineering and the rapid development of science and simulation technology have been greatly development, and they are widely used in the design of weapons systems. In the planning, design, operation, analysis and the various stages of transformation in the fuze system , the simulation technology can play an important role. To improve the pseudo-random code phase fuse design efficiency,we use MATLAB Simulink to simulate the pseudo-random code Phase fuse design. The simulation software our design used MATLAB Simulink is a system for communication, signal processing systems design and simulation software. It is very convenient and efficient communication system for all types of simulation
Keywords Simulation MATLAB Simulink Signal Process
目 录
1 绪论 1
1.1 武器系统仿真发展概况及 MATLAB Simulink软件概述 1
1.2 对高精度伪码跟踪设计仿真的必要性 2
1.2.1 伪随机码跟踪的发展概述 2
1.2.2 对伪随机码跟踪仿真的必要性 2
1.3 本设计的任务 3
2高精度伪码跟踪原理及系统仿真设计 3
2.1伪随机码跟踪特点 4
2.2伪随机码引信的基本组成及工作过程 5
2.3伪随机码m序列的产生及相关函数 6
2.4高精度伪码跟踪信号处理 7
2.5多普勒效应 11
2.6小结 13
3 高精度伪码跟踪仿真 14
3.1伪随机m序列参数的选择 14
3.1.1码元宽度的选择 14
3.1.2码长的选择 15
3.2.对伪随机码跟踪的仿真及信号分析 16
3.2.1 发射信号的仿真 16
3.2.2 对引信实现动态仿真 19
3.2.3 对高精度伪码跟踪系统仿真及分析 25
3.3 对经典伪随机码跟踪的改进 30
3.3.1 对高精度伪码引信改进的理论推导 30
3.3.2 改进后高精度伪码引信系统仿真 31
3.3.3多普勒频率影响及相关解决措施 33
3.4 小结 36
4 总结与展望 37
致 谢 38
参 考 文 献 39