袁帅,,
刘董华,
李群
重庆邮电大学信号与信息处理重庆市重点实验室 ??重庆 ??400065
基金项目:国家自然科学基金(61671095, 61371164, 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)
详细信息
作者简介:张天骐：男，1971年生，博士后，教授，主要研究方向为通信信号的调制解调、盲处理、语音信号处理、神经网络实现以及FPGA, VLSI实现
袁帅：男，1993年生，硕士生，研究方向为导航信号的捕获与跟踪
刘董华：男，1992年生，硕士生，研究方向为通信信号盲估计
李群：女，1991年生，硕士生，研究方向为直扩信号的盲处理
通讯作者:袁帅 384774936@qq.com
中图分类号:TN911计量
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被引次数:0
出版历程
收稿日期:2018-01-23
修回日期:2018-07-19
网络出版日期:2018-08-03
刊出日期:2018-11-01
Accurate Acquisition of High Order Double Binary Offset Carrier Signals for High Dynamic Environment
Tianqi ZHANG,Shuai YUAN,,
Donghua LIU,
Qun LI
Chongqing Key Laboratory of Signal and Information Processing, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
Funds:The National Natural Science Foundation of China (61671095, 61371164, 61702065, 61701067, 61771085), The Project of Key Laboratory of Signal and Information Processing of Chongqing (CSTC2009CA2003), Chongqing Graduate Research and Innovation Project (CYS17219), The Research Project of Chongqing Educational Commission (KJ1600427, KJ1600429)
摘要
摘要:针对高动态环境下双二进制偏移载波(DBOC)调制信号无法精确捕获的问题，该文提出一种基于部分匹配滤波结合快速傅里叶变换(PMF-FFT)的捕获方法。又针对捕获过程中相关损失和扇贝损失引起的检测性能降低问题，提出一种改进的捕获方法。该方法首先利用离散多项式相位变换(DPT)去除接收信号的高阶动态项，然后针对DBOC信号重新设计PMF-FFT算法；最后利用频谱校正法对FFT后的功率谱最大值进行校正。仿真结果表明，在同一条件下，该方法将检测概率提高了2 dB左右，并且有效缩短了捕获时间。
关键词:信号处理/
高动态环境/
双二进制偏移载波/
离散多项式相位变换/
频谱校正/
部分匹配滤波-快速傅里叶变换
Abstract:For the problem of without accurate acquisition of Double Binary Offset Carrier (DBOC) modulated signal for high dynamic environment, a method which is based on Partial Matched Filtering (PMF) - Fast Fourier Transform (FFT) is proposed. According to the problem of low detection performance caused by the related loss and scallop loss, a new improved acquisition scheme is proposed. Firstly, the Discrete Polynomial phase Transform (DPT) is used to remove the high order dynamic term of the received signal, and then the PMF-FFT algorithm is redesigned for the DBOC signal. Finally, the spectrum correction method is used to correct the maximum power spectrum after FFT. Simulation results show that, under the same conditions, the proposed scheme improves the detection probability by about 2 dB, and shortens effectively the acquisition time.
Key words:Signal processing/
High dynamic environment/
Double Binary Offset Carrier (DBOC)/
Discrete Polynomial-phase Transform (DPT)/
Spectrum correction/
Partial Matched Filtering-Fast Fourier Transform (PMF-FFT)
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