系统工程与电子技术 ›› 2025, Vol. 47 ›› Issue (12): 4196-4202.doi: 10.12305/j.issn.1001-506X.2025.12.31

• 通信与网络 • 上一篇    

基于离散多项式串行傅里叶变换的高动态信号捕获算法

巩克现, 张飞(), 孙鹏, 王玮, 张玲   

  1. 郑州大学电气与信息工程学院,河南 郑州 450001
  • 收稿日期:2024-09-24 修回日期:2025-02-20 出版日期:2025-04-22 发布日期:2025-04-22
  • 通讯作者: 张玲 E-mail:ielingzhang@163.com
  • 作者简介:巩克现(1976—),男,教授,博士,主要研究方向为无线通信信号分析与处理、信道编码
    张 飞(1999—),男,硕士研究生,主要研究方向为通信信号处理、卫星通信
    孙 鹏(1990—),男,副教授,博士,主要研究方向为无线通信、消息传递理论、毫米波通信
    王 玮(1974—),女,副教授,博士,主要研究方向为无线通信、信号处理
  • 基金资助:
    国家自然科学基金青年基金(61901417);河南省科技攻关计划(242102211107)资助课题

High dynamic signal capture algorithm based on discrete polynomial serial Fourier transform

Kexian GONG, Fei ZHANG(), Peng SUN, Wei WANG, Ling ZHANG   

  1. School of Electrical and Information Engineering,Zhengzhou University,Zhengzhou 450001,Chaina
  • Received:2024-09-24 Revised:2025-02-20 Online:2025-04-22 Published:2025-04-22
  • Contact: Ling ZHANG E-mail:ielingzhang@163.com

摘要:

针对动态多普勒频偏给信号捕获过程中带来的能量累积受限问题,提出一种结合离散多项式串行傅里叶变换的高动态直接序列扩频信号捕获算法。首先,通过计算解扩后的信号瞬态矩,降阶处理信号动态多普勒频偏信息,然后通过顺序傅里叶变换的方式搜索相关峰值,最后通过非相干叠加累积相关峰值能量,实现捕获功能。推导了算法峰值信噪比(peak signal-to-noise ratio,PSNR)理论值,证明所提算法PSNR与信号多普勒变化率无关。仿真结果表明,所提算法在不增加计算复杂度的情况下获得更大的动态多普勒频偏适用范围,更适合高动态低信噪比的通信环境。

关键词: 高动态, 多普勒变化率, 离散多项式变换, 顺序傅里叶变换

Abstract:

Aiming at the energy accumulation limitation problem brought by the dynamic Doppler frequency deviation to the signal capture process, a high dynamic direct sequence spread spectrum signal capture algorithm combining with discrete polynomial serial Fourier transform is proposed. Firstly, the dynamic Doppler frequency deviation information of the signal is processed by calculating the transient moments of the dispreading signal in descending order, then the correlation peaks are searched by means of sequential Fourier transform, and finally, the correlation peak energies are accumulated by incoherent superposition to implement the capturing function. The theoretical peak signal-to-noise ratio (PSNR) of the proposed algorithm is derived, and it is proved that the PSNR of the proposed algorithm is independent of the Doppler variation rate of the signal. Simulation results show that the proposed algorithm obtains a larger dynamic Doppler frequency deviation range without increasing the computational complexity, which is more suitable for the communication environment with high dynamic and low signal-to-noise ratio.

Key words: high dynamic, Doppler change rate, discrete polynomial transformation, sequential Fourier transform

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