基于底噪拟合的Ku频段卫星频谱信号检测方法  

A Ku-band satellite spectrum signal detection method based on bottom noise fitting

作　　者：白晓东[1,2] 朱文登 刘波[1,2] 张更新 洪涛[1,2] 胡婧 BAI Xiaodong;ZHU Wendeng;LIU Bo;ZHANG Gengxin;HONG Tao;HU Jing(Telecommunication and Network National Engineering Research Center,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Key Lab of Broadband Wireless Communication and Sensor Network Technology,Ministry of Education,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;College of Communications Engineering,The Army Engineering University of PLA,Nanjing 210007,China)

机构地区：[1]南京邮电大学通信与网络国家工程研究中心,江苏南京210003 [2]南京邮电大学宽带无线通信与传感网技术教育部重点实验室,江苏南京210003 [3]中国人民解放军陆军工程大学通信工程学院,江苏南京210007

出　　处：《南京邮电大学学报（自然科学版）》2019年第3期51-57,共7页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61701260,91738201);南京邮电大学引进人才科研启动基金(NY214144)资助项目

摘　　要：卫星通信在民用和军用通信中承担着越来越重要的责任,针对卫星频谱进行监测有助于提高卫星频谱利用率。由于地面通信、干扰信号和其他噪声分布情况具有不可预知性,待检测卫星频谱中的噪声基底往往起伏较大,这提高了频谱信号参数感知的难度。文中提出了一种适用于Ku频段卫星频谱监测场景的频谱信号检测方法。对于每一条频谱数据,算法首先使用五阶傅里叶级数拟合该条数据的噪声基底以降低其对频谱感知的影响,然后对处理后的频谱进行能量检测。经过仿真实验证明,五阶傅里叶级数能利用部分底噪较为准确地还原出完整的频谱底噪,文中提出的方法在Ku频段卫星频谱数据上相对于传统的能量检测法能够实现更好的信号检测效果。Satellite communications bears an increasingly important responsibility in civil and military communications,and monitoring satellite spectrum helps to improve satellite spectrum utilization.Due to the unpredictability of terrestrial communications,interference signals and other noise distributions,the noise floor in the spectrum of the satellite to be detected often has a large fluctuation,which increases the difficulty of sensing the spectral signal parameters.This paper proposes a spectrum signal’s detection method suitable for Ku-band satellite spectrum monitoring scenarios.For each spectral data,the algorithm first uses the Fourier series to fit the noise floor of the data to reduce its impact on the spectrum perception,and then performs energy detection on the processed spectrum.The simulations show that the proposed method can achieve better signal detection effect on the Ku-band satellite spectrum data than the traditional energy detection method.

关 键 词：卫星频谱监测 傅里叶级数拟合 起伏底噪 能量检测法 

分 类 号：TN927.23[电子电信—通信与信息系统]