基于DDS技术的多功能信号发生器设计

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本文主要探讨了DDS(Direct Digital Synthesizer,直接数字频率合成器)函数信号发生器的设计与实现。作者景国新,来自电子科技大学成都分校,他针对DDS技术进行了深入研究,并将其应用到实际的信号发生器设计中。DDS技术的核心是利用数字信号处理器的高精度和灵活性,通过一系列数字算法来生成复杂的频率和波形,从而替代传统的模拟方法。 设计的多功能函数信号发生器以一种特定的DDS集成芯片(具体型号未给出)作为核心,这颗芯片提供了高频精确控制和快速响应的能力。单片机作为控制系统,负责数据处理和指令执行,确保了信号发生器的高度性能和操作的灵活性。外围器件如模拟乘法器和宽带放大器则进一步增强了信号的质量和覆盖范围,使其适用于各种实验和测试环境。 本文的关键技术包括直接数字频率合成,即利用数字逻辑电路直接生成所需频率,无需通过模拟信号的连续调整。这种技术的优势在于可以实现快速频率切换,同时减少功耗和体积,使得信号发生器具有更高的效率和可靠性。此外,文章还提到了与模拟锁相环和小数分频锁相环等传统方法的比较,强调了DDS技术在现代频率合成领域的领先地位。 本文的关键词涵盖了DDS技术、信号发生器、模拟乘法和宽带放大器,这些概念共同构成了信号发生器设计的基础。整个系统旨在为实验室提供一个高效、灵活的信号源解决方案,推动仪器设备性能的提升。文章详细介绍了技术原理、设计流程和实现细节,对于从事信号处理和频率合成研究的读者来说,具有很高的参考价值。
2009-10-06 上传
摘要:随着CDMA扩频通信技术在民用通信中的深入应用和不断渗透,以及在卫星通信、深空通信、武器制导、GPS全球定位系统和跳频通信等民用和国防军事通信的强烈需求下,扩频通信技术已占据着越来越重要的地位。而跳频通信正是扩频通信的一种重要实现方式,它具有抗干扰、抗衰落、抗截获能力,兼有能多址组网应用等诸多优点。在现代军事通信尤其是战术抗干扰电台当中,跳频通信技术获得了广泛的应用。 本课题利用Matlab软件对跳频通信原理进行分析,主要进行了以下几个方面的研究工作: 1.通过对扩频通信以及跳频通信相关方面知识的了解,进一步掌握跳频信号发生器设计的关键技术。主要包括:跳频信号的发送和接收,跳频图案的设计,BPSK调制原理。 2.利用Matlab软件,实现了跳频频谱的生成。主要包括:载波信号的产生,BPSK调制信号的产生,跳频图案及频谱的生成(设定6个频率段作为跳频图案,根据BPSK信号和跳频图案的运算产生频谱)。 经过上面的设计,不仅可以在理论方面得到加强,而且能通过软件很好的实现功能,这样就达到了跳频抗干扰的目的。 关键字:扩频通信 跳频通信 BPSK调制 Matlab 指导老师签字: Based on the Matlab the frequency-hopping signal generator Design Students Name : Liao Feng Class : 05804320 Supervisor : Zou Qiong Abstract : With the CDMA spread spectrum communication technology in the civilian communications applications and continuous penetration depth, as well as in satellite communications, deep space communications, weapons guidance, GPS global positioning systems and frequency hopping communications and other civilian and military communications for national defense under the strong demand , spread-spectrum communication technology has become an increasingly important position. Communication and frequency hopping spread spectrum communication is an important way to achieve, it has anti-jamming, anti-fading, anti-interception capabilities, both to the application of multi-access network, and many other advantages. In the modern tactical military communications, especially radio interference, the frequency-hopping communication technologies to obtain a wide range of applications. The subject of the use of Matlab software, an analysis of the principle of frequency hopping communications, mainly for the following research work: 1.Through the frequency-hopping spread-spectrum communications and communications-related aspects of knowledge, and further frequency-hopping signal generator designed to master the key technology. Include: frequency hopping to send and receive signals, the design of frequency-hopping pattern, BPSK modulation principle. 2. The use of Matlab software, to achieve the generation of a spectrum frequency hopping. Include: the selection of the carrier signal, BPSK modulation signal generation, frequency-hopping pattern and the generation of the spectrum (set six frequency bands as frequency hopping patterns, according to BPSK signals and frequency hopping pattern of the computing spectrum generated). Through the above design, not only in theory, be strengthened, and through the realization of software functions very well, so that to achieve a frequency-hopping anti-jamming purposes.