摘要
针对230 MHz频段的频谱感知实现,文中设计了基于AD9364及FPGA的硬件系统。为了实现较高的频谱分辨率,采用数字信道化的方法,增加FFT计算的点数,最终的频谱分辨率为100 Hz。系统中的频谱感知采取能量检测的方法,该方法有效且易于实现,当信噪比大于3 dBm时,可以判断该频谱被占用。数字信道化及FFT均在FPGA中实现,频谱拼接和能量检测则在MATLAB中实现。通过多次的仿真测试证明了该系统的有效性。
Aiming at the realization of spectrum sensing in 230 MHz band,a hardware system based on AD9364 and FPGA is designed in this paper.In order to achieve a higher spectral resolution,the digital channelization is adopted to increase the points of FFT,and the final spectral resolution is 100 Hz.The spectrum sensing in the system adopts the method of energy detection,which is effective and easy to realize.It can be judged that the spectrum is occupied when the SNR is greater than 3 dBm.Digital channelization and FFT are implemented in FPGA,and the spectrum splicing and energy detection are implemented in MATLAB.The effectiveness of the proposed system can be proved by many simulation tests.
作者
罗义军
杜瑞华
尹棋
李劲
Luo Yijun;Du Ruihua;Yin Qi;Li Jin(School of Electronic Information,Wuhan University,Wuhan 430072,China;School of Electronic Information and Electrical Engineering,Wuhan Textile University,Wuhan 430200,China)
出处
《电测与仪表》
北大核心
2020年第24期46-51,共6页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(41801261)。
