《DS扩频通信系统抗窄带干扰性能研究》-毕业论文.docVIP

哈尔滨工业大学本科毕业论文 MACROBUTTON PAGE II - - - PAGE 16 - DS扩频通信系统抗窄带干扰性能研究 边## （陕西理工学院物理与电信工程学院通信 班，陕西 汉中 723003） 指导教师：陈莉 [摘 要] 扩频通信技术是现代通信系统中的一种新兴的通信方式，其较强的抗干扰、抗衰落和抗多径性能以及频谱利用率高、多址通信等诸多优点越来越为人们所认识，并被广泛地应用于军事通信和民用通信的各个领域，从而推动了通信事业的发展。 文中主要阐述了扩频通信技术的理论依据和基本概念，结合扩频通信技术的分类和原理简单介绍了直接序列扩展频谱、跳频扩频通信系统、频率跳变-直接序列混合系统。并以伪随机码序列作为扩频函数的直接序列扩展频谱通信系统的模型为例，重点讨论其抗干扰能力，并在此理论基础上建立起直接序列扩频通信系统抗正弦干扰、抗窄带干扰的仿真模型。最后，简单概述了扩频通信的发展趋势，及它的两个主要应用。 [关 键 词] 扩频通信, 直接序列扩频通信, 抗干扰, 仿真 [中图分类号] TN771 [文献标志码] A Study of narrowband interference suppression in DS spread spectrum communication system Bian # # (Grade10,Class4,Major of Communication Engineering，School of Physics and telecommunication Engineering of Shaanxi University of Technology, Hanzhong 723003,China) Tutor: Chen Li [Abstract] Spread spectrum communication technology is the modern communication system of a new kind of communication mode, its strong anti-interference, fight decline and spectrum anti-multipath performance and high efficiency and multi-access communication, and many other advantages for people place more and more understanding, and is widely used in military communications and civil communication each domain, so as to promote the development of the cause of the communication. This paper mainly expounds the spread spectrum communication technology the theoretical basis and basic concept of combining the spread spectrum communication technology principle and the classification of the brief introduction the direct sequence spread spectrum, frequency-hopping spread spectrum communication system, frequency hopping - direct sequence mixing system. And with pseudo-random code sequence as the direct sequence spread spectrum function model of spread spectrum communication system as an example, mainly discussed the anti interference ability, and based on this theory in establish direct sequence spread spectrum communication system fight sine interference, a simulation model of narrowband interference resistance. Finall