手持式软件无线电平台实时频谱分析功能设计与实现

发布时间：2018-02-22 01:30

本文关键词： 实时频谱抽取滤波快速傅里叶变换帧重叠 FPGA　出处：《电子科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：在野外环境下,为了建立快速、可靠的通信,需要对信号频谱进行实时监测分析。这样就对频谱监测设备的便携性以及频谱分析的方式提出了新的要求。目前,大多数频谱监测设备采用扫频式的处理方式,且体积庞大,不易携带。而手持式软件无线电平台具有易携带、频谱分析方式软件可重构等特点。因此,论文利用该平台优势,设计并实现了实时频谱分析功能,具体包括:第一,分析了实时频谱分析算法。结合平台硬件架构及项目需求,设计了一种结合抽取滤波、快速傅里叶变换、帧重叠和模板触发等技术的算法方案,并对算法进行了MATLAB仿真验证。第二,实现了软件设计方案。根据实时频谱分析算法方案和手持式软件无线电硬件平台特点,在FPGA上完成了功能模块及接口设计,并用Model Sim对模块进行了行为级仿真。第三,完成了实时频谱的测试与分析。在手持式软件无线电平台上,首先针对实时频谱分析的功能模块及接口进行了测试与分析,并在Android下调试了实时频谱分析软件;然后对频率监测范围及误差、功率监测范围及误差进行了测试与分析。通过测试,可以对225MHz~400MHz频率范围内的信号,完成2MHz的实时带宽分析;信号功率监测范围:?90 d Bm~0 d Bm,最小频率分辨率50Hz,信号频率误差?3PPM,功率误差?3d Bm。论文在手持式软件无线电平台上设计并实现了实时频谱分析功能,实际测试表明该方案可在野外环境下,更加便携的对信号进行实时频谱监测。
[Abstract]:In the field environment, in order to establish fast and reliable communication, it is necessary to monitor and analyze the signal spectrum in real time. Most of the spectrum monitoring equipments adopt frequency sweeping processing, which is huge and difficult to carry. The portable software radio platform is easy to carry and the spectrum analysis software can be reconfigurable. Therefore, this paper makes use of the advantages of the platform. The function of real-time spectrum analysis is designed and realized. Firstly, the algorithm of real-time spectrum analysis is analyzed. The algorithm scheme of frame overlap and template trigger is implemented, and the algorithm is verified by MATLAB simulation. Secondly, the software design scheme is implemented. According to the algorithm of real-time spectrum analysis and the hardware platform of hand-held software radio, The design of function module and interface on FPGA is completed, and the behavioral level simulation of the module is carried out with Model Sim. Thirdly, the real-time spectrum is tested and analyzed. First of all, the function module and interface of real-time spectrum analysis are tested and analyzed, and the real-time spectrum analysis software is debugged under Android, and then the frequency monitoring range and error are analyzed. The range and error of power monitoring are tested and analyzed. By testing, the signal in the frequency range of 225MHz can be analyzed in real time bandwidth at 2MHz. 90d Bm~0 dBm, minimum frequency resolution 50Hz, signal frequency error? 3PPM, power error? The paper designs and realizes the real-time spectrum analysis function on the handheld software radio platform. The actual test shows that this scheme can monitor the real-time spectrum of the signal more conveniently in the field environment.
【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】：TM935.21

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