采用伪噪声重采样的海事卫星上行信号的检测与定向  

Detection and orientation for Inmarsat satellite uplink signal based on pseudo-noise resampling

作　　者：王佳栋[1,2,3] 王晓江 牛丽莹 郑国莘 WANG Jiadong;WANG Xiaojiang;NIU Liying;ZHENG Guoxin(Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China;Joint International Research Laboratory of Specialty Fiber Optics and Advanced Communication, Shanghai University, Shanghai 200444, China;Shanghai Institute for Advanced Communication and Data Science, Shanghai University, Shanghai 200444, China)

机构地区：[1]上海大学特种光纤与光接入网省部共建重点实验室,上海200444 [2]上海大学特种光纤与先进通信国际合作联合实验室,上海200444 [3]上海大学上海先进通信与数据科学研究院,上海200444

出　　处：《上海大学学报（自然科学版）》2017年第6期865-873,共9页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(61132003;61571282)

摘　　要：在均匀圆形阵列(uniform circular array,UCA)上采用伪噪声重采样(pseudo-noise resampling,PR),利用ROOT-MUSIC算法对海事卫星上行信号进行测向.为了提高低信噪比(signal noise ratio,SNR)下的预测精度,在传统伪噪声重采样的基础上利用统计均值与标准差提出了新的先验条件,并比较了不同的统计数据形成的先验条件对系统性能的影响.仿真结果表明,低信噪比下本方法比常规圆形阵列上的ROOT-MUSIC算法在检测性能上有较大提高.Pseudo-noise resampling （PR） is applied to uniform circular array （UCA） to find the direction of arrival （DOA） of Inmarsat satellite uplink signal based on ROOT- MUSIC. To improve the DOA resolution at low SNR, a new estimation algorithm is pro- posed based on means and standard deviations of pre-estimate. Meanwhile, performance computations are carried out under different pre-estimation conditions due to different sta- tistical data. Simulations show that the proposed scheme can significantly improve the DOA resolution at low signal noise ratio （SNR） compared with the conventional ROOT- MUSIC algorithm.

关 键 词：伪噪声重采样 均匀圆形阵列 海事卫星 测向 ROOT-MUSIC 

分 类 号：TN911.7[电子电信—通信与信息系统]