基于全相位频谱校正的TMBOC信号的捕获  

Capture of TMBOC signals based on all-phase spectrum correction

作　　者：赵健根 张天骐[1,2] 喻盛琪 Zhao Jiangen;Zhang Tianqi;Yu Shengqi(a.School of Communication&Information Engineering,School of Communication&Information Engineering,Chongqing University of Posts&Telecommunications,Chongqing 400065,China;Chongqing Key Laboratory of Signal&Information Processing,School of Communication&Information Engineering,Chongqing University of Posts&Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学通信与信息工程学院信号与信息处理重庆市重点实验室,重庆400065

出　　处：《计算机应用研究》2020年第6期1858-1862,共5页Application Research of Computers

基　　金：国家自然科学基金资助项目(61671095,61702065,61701067,61771085);信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003);重庆市研究生科研创新项目(CYS17219);重庆市教育委员会科研项目(KJ1600427,KJ1600429)。

摘　　要：针对使用传统部分匹配滤波器(PMF)结合快速傅里叶变换(FFT)无法精确捕获时分复用二进制偏移载波(TMBOC)调制信号的问题,提出一种基于全相位频谱校正的捕获方法。首先通过PMF过程对接收信号进行部分相关运算,再使用全相位快速傅里叶变换(ap FFT)算法对多普勒效应进行补偿,最后结合全相位频谱校正技术对功率谱进行校正。仿真结果表明,在同一条件下,该算法比PMF-FFT加窗算法检测概率提高了3 d B左右,并有效缩短了捕获时间。该算法可比PMF-FFT加窗算法更精确捕获TMBOC信号。For the problem of the traditional partial matched filter( PMF) combined with fast Fourier transform( FFT) could not accurately capture the time-division multiplexed binary offset carrier( TMBOC) modulated signal,this paper proposed a capture method based on all-phase spectrum correction. Firstly,it received signal with PMF for partial correlation operation,then used the all-phase fast Fourier transform( apFFT) algorithm to compensate the Doppler effect. Finally,the power spectrum was corrected in combination with the all-phase spectrum correction technique. The experimental results show that,under the same conditions,the proposed scheme improves the detection probability by about 3 dB than the PMF-FFT windowing algorithm,and shortens effectively the acquisition time. This algorithm captures the TMBOC signal more accurately than the PMFFFT windowing algorithm.

关 键 词：部分匹配滤波器 快速傅里叶变换 二进制偏移载波调制信号 频谱校正 全相位快速傅里叶变换 

分 类 号：TN911.3[电子电信—通信与信息系统]