某型HF通信设备SDR技术应用研究与实现

发布时间：2018-05-26 00:22

本文选题：数字信号处理 + 零中频技术　；参考：《电子科技大学》2014年硕士论文

【摘要】：随着软件无线电技术的兴起和数字信号处理芯片的飞速发展,发展我军的射频数字化设备已成为必然。短波数字化接收/激励器的概念是设备的数字化部分由中频部分延伸至射频部分。短波数字化接收激励器的工作原理分为接收和激励两个方面。接收方面:采用一个高中频的接收方案,将接收的2~30MHz的射频信号变换成中频信号;采用中频数字化处理技术将中频调制、组帧、传输、解帧、解调成音频信号。激励方面:采用零中频的方案,采样3KHz内的音频信号,经过采样、调制、组帧、传输、解帧、解调、调制成2~30MHz射频信号。本文首先简要介绍了论文的选题背景,然后着重讨论了研究数字化接收/激励器的必要性、目的和意义。其次,给出短波接收/激励器的总体设计思想,然后根据数字式接收/激励器设计的基本理论,构建了硬件平台,给出了软件设计思想,阐述了关键器件;研究了零中频技术的设计方法和技术难点,给出了实施的效果;介绍了平台的SSB、AM、CW、信号电平估计、AGC控制、判决反馈均衡器的设计方法及接收激励器的控制台。最后,通过对HF收发信机的研究,提高了短波接收/激励器的数字化程度,改变了过去数字化设备必须经过中频然后模拟搬移到射频的传统模式,实现了直接从基带信号经数字化处理到射频。研制的数字化接收激励器,功能完备;性能指标符合技术规格书要求。本设计的优点主要有:整个设备采用了一个高中频接收和发零中频的方案,简化了电路,减少组合频率,提高了指标;数字中LVDS总线传输技术的运用提高了数字化程度;数字中频的正交调制、解调技术,提高了抗干扰能力;通过差分总线对本接收/激励器进行控制,改变了传统的离散线控制的方式,提高了抗干扰性能;整个设备的功能完全由软件控制,调试简便,不仅增强了设备的灵活性,而且缩短了升级周期,降低了升级成本。本文所研制的短波数字化接收/激励器性能较优,并且已经应用于实践。
[Abstract]:With the rise of software radio technology and the rapid development of digital signal processing chips, it is necessary to develop the radio frequency digital equipment of our army. The concept of short wave digital receiving / exciter is that the digital part of the equipment extends from intermediate frequency to RF part. The working principle of short wave digital receiving exciter is divided into reception and excitation. Two aspects. Reception: using a high and medium frequency reception scheme, the radio frequency signals received by 2~30MHz are converted into intermediate frequency signals, and intermediate frequency digital processing technology is used to modulate the intermediate frequency, frame, transmit, frame and demodulate the audio signal. System, frame, transmission, frame, demodulation and modulation into 2~30MHz radio frequency signal. Firstly, this paper briefly introduces the background of the thesis, then focuses on the necessity, purpose and significance of studying the digital receiving / exciter. Secondly, it gives the overall design idea of the short wave receiver / exciter, and then according to the digital receiver / exciter design basis. In this theory, the hardware platform is constructed, the idea of software design is given, the key devices are expounded, the design methods and technical difficulties of zero intermediate frequency technology are studied and the effect of the implementation is given. The design method of the SSB, AM, CW, signal level estimation, AGC control, the design method of the decision feedback equalizer and the console of the receiving exciter are introduced. Finally, the method is passed. The study of HF transceiver improves the digital degree of the short wave receiver / exciter. It changes the traditional mode that the digital equipment must pass through the intermediate frequency and then simulates the moving to the radio frequency. It realizes the digital processing of the baseband signal to the radio frequency. The digital receiving exciter has complete function and the performance index is in line with the technology. The advantages of this design are as follows: the whole device has a high school frequency reception and zero intermediate frequency scheme, which simplifies the circuit, reduces the combination frequency and improves the index; the digital LVDS bus transmission technology improves the digitalization degree; the digital medium frequency quadrature modulation, demodulation technology improves the anti-interference ability; The differential bus controls the receiver / actuator, changes the traditional discrete line control method and improves the anti-interference performance. The function of the whole device is controlled by software and easy to debug. It not only enhances the flexibility of the equipment, but also shortens the upgrade cycle and reduces the cost of upgrading. The short wave digital reception / excitation developed in this paper has been developed in this paper. The exciter is superior in performance and has been applied to practice.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN915.05

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