《计算机应用研究》|Application Research of Computers

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

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作者 赵健根,张天骐,喻盛琪
机构 重庆邮电大学 a.通信与信息工程学院;b.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
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文章编号 1001-3695(2020)06-053-1858-05
DOI 10.19734/j.issn.1001-3695.2018.12.0898
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(apFFT)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 dB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。
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
基金项目 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)
本文URL http://www.arocmag.com/article/01-2020-06-053.html
英文标题 Capture of TMBOC signals based on all-phase spectrum correction
作者英文名 Zhao Jiangen, Zhang Tianqi, Yu Shengqi
机构英文名 a.School of Communication & Information Engineering,b.Chongqing Key Laboratory of Signal & Information Processing,School of Communication & Information Engineering,Chongqing University of Posts & Telecommunications,Chongqing 400065,China
英文摘要 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 PMF-FFT windowing algorithm.
英文关键词 partially matched filter; fast Fourier transform; time multiplexed binary offset carrier; spectrum correction; all-phase fast Fourier transform
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收稿日期 2018/12/7
修回日期 2019/1/29
页码 1858-1862
中图分类号 TN911.3
文献标志码 A