扩频技术是目前抗干扰通信的主流技术，应用非常广泛，扩频通信有抗干扰、抗

扩频技术是目前抗干扰通信的主流技术，应用非常广泛，扩频通信有抗干扰、抗噪音、抗多径衰落、隐蔽性高、截获概率低、可多址复用和任意选址等优点。然而这些技术的应用不受时间和空间的限制。利用了空间的冗余性，加强在所需方向上的传输，避开干扰，能显着改善通信的性能。但是无线通信信号毕竟是暴露在空间的，这就给对方的截获和干扰提供了机会。干扰是必然存在的，所以应该进一步改善扩频技术，提高抗干扰能力。<br>本文首先着重讨论几种常见扩频技术的基本原理以及其抗干扰性能，阐述了扩频通信的工作原理、特点和主要工作方式,包括直接序列扩频系统(DS-SS)、跳频扩频系统(FH-SS)、自编码系统,并对直接扩频与跳频两种通用工作方式作了比较。接着针对干扰信号对几种经典扩频技术提出了改进措施，为进一步综合优化抗干扰技术打下基础。最后针对改进措施，借助MATLAB平台，基于m序列和Gold序列的扩频系统在AWGN信道下的性能，表明了改进技术的优越性，说明了研究学习的意义。

扩频技术是目前抗干扰通信的主流技术，应用非常广泛，扩频通信有抗干扰、抗噪音、抗多径衰落、隐蔽性高、截获概率低、可多址复用和任意选址等优点。 然而这些技术的应用不受时间和空间的限制。 利用了空间的冗余性，加强在所需方向上的传输，避开干扰，能显著改善通信的性能。 但是无线通信信号毕竟是暴露在空间的，这就给对方的截获和干扰提供了机会。 干扰是必然存在的，所以应该进一步改善扩频技术，提高抗干扰能力。<br>本文首先着重讨论几种常见扩频技术的基本原理以及其抗干扰性能，阐述了扩频通信的工作原理、特点和主要工作方式,包括直接序列扩频系统(DS-SS)、跳频扩频系统(FH-SS)、自编码系统, 并对直接扩频与跳频两种通用工作方式作了比较。 接着针对干扰信号对几种经典扩频技术提出了改进措施，为进一步综合优化抗干扰技术打下基础。 最后针对改进措施，借助MATLAB平台，基于m序列和Gold序列的扩频系统在AWGN信道下的性能，表明了改进技术的优越性，说明了研究学习的意义。

Spread spectrum technology is the mainstream technology of anti-jamming communication, which is widely used. Spread spectrum communication has the advantages of anti-jamming, anti noise, anti multipath fading, high concealment, low probability of interception, multiple access multiplexing and arbitrary location. However, the application of these technologies is not limited by time and space. Using the redundancy of space, enhancing the transmission in the required direction, avoiding interference, can significantly improve the performance of communication. But after all, wireless communication signals are exposed in space, which provides opportunities for interception and interference. Interference is inevitable, so spread spectrum technology should be further improved to improve the anti-interference ability.<br>In this paper, the basic principle and anti-jamming performance of several common spread spectrum technologies are discussed, and the working principle, characteristics and main working modes of spread spectrum communication are described, including direct sequence spread spectrum system (DS-SS), frequency hopping spread spectrum system (FH-SS) and self coding system, and the two general working modes of direct spread spectrum and frequency hopping are compared. Then, the improvement measures of several classical spread spectrum technologies are proposed for jamming signals, which lays the foundation for further comprehensive optimization of anti-jamming technology. Finally, aiming at the improvement measures, with the help of MATLAB platform, the performance of spread spectrum system based on m-sequence and gold sequence in AWGN channel shows the superiority of the improved technology and the significance of research and learning.<br>