【作者】 耿青峰；

【导师】 冯小平；

【作者基本信息】 西安电子科技大学 ， 电路与系统， 2011， 硕士

【摘要】 调制解调和调制识别技术广泛应用于军事通信和民用通信。通信信号的调制识别和参数提取对敌方信号进行通信干扰、侦察视听非常重要。通信信号的这些技术同样可以应用在信号验证、干扰识别、提取信号频率等方面。本文首先介绍了几种常用的数字通信的调制和解调技术,在此基础上基于FPGA设计和实现了2PSK、ASK、QPSK、2FSK、8FSK、2DPSK、QDPSK等7种数字通信信号的解调器,并将其7种不同的解调器应用于同一个设计模块中,实现其通用解调器的效果,给出了解调器的设计方法和误码率测试结果,并分析对比实际结果与理论结果。其次介绍了数字通信信号的调制特征参数提取和基于决策树分类器的调制识别技术,基于DSP的调制识别技术的编程和实现,给出了对2ASK、2FSK、8FSK、2PSK/2DPSK、QPSK/QDPSK等分类识别结果,并对结果做出相应的分析。最后讨论了几种针对数字通信信号的干扰技术,统计了干扰效果。将以上三种技术集成后,应用于通信和通信对抗实验仪中,并且进行了系统调试和测试,实践结果论证了其设计的合理性。更多还原

【Abstract】 Modulation and demodulation recognition technology is widely used in military communication and civil communications. Communication signals’modulation recognition and parameters extraction is very important for communication interference, reconnaissance, audio-visual of the enemy signal These techniques of communication signals can also be used in signal validation, interference identification and extraction signal frequency, etc.This paper introduces several common modulation and demodulation of digital communications technology, on this basis, design and implementation of FPGA-based 2PSK, ASK, QPSK, 2FSK, 8FSK, 2DPSK, QDPSK 7 kinds of digital communication signals’demodulator, and the 7 different demodulator used in the same design module, to achieve its universal demodulator effect, and analyzing and comparing actual results with the theoretical results. Then introduces the digital communication signal modulation feature extraction and modulation recognition technology base on decision tree classifier, DSP-based modulation recognition technology, programming and implementation, given to the classification and recognition results Such as 2ASK, 2FSK, 8FSK, 2PSK/2DPSK, QPSK/QDPSK.Finally, discussing interference technology about several digital communication signal, statistics of the interference effect. After integrating the above three techniques, used in communications and communications countermeasure experimental instrument, and conducted a system debugging and testing, practical results demonstrate the rationality of its design.更多还原