J4 ›› 2010, Vol. 28 ›› Issue (02): 124-.

• 论文 • 上一篇    下一篇

基于WVD改进算法的跳频信号参数估计

陈 超1a|郝雁中1b|高宪军1a|孙 强2   

  1. 1空军航空大学 a航空电子工程系;b航空理论系|长春 130022;294592部队|江苏 徐州 221000
  • 出版日期:2010-03-25 发布日期:2010-06-10
  • 通讯作者: 陈超(1983— ),男,辽宁抚顺人,空军航空大学电子工程系助教,主要从事航空电子侦察情报与机载雷达技术研究,(Tel)86-13578779875 E-mail:chenchao.19830823@163.com
  • 作者简介:陈超(1983— )|男|辽宁抚顺人|空军航空大学电子工程系助教|主要从事航空电子侦察情报与机载雷达技术研究|(Tel)86-13578779875(E-mail)chenchao.19830823@163.com;高宪军(1965— )|男|吉林白城人|空军航空大学教授|主要从事航空通信导航技术与航空通信侦察技术研究|(Tel)86-431-86958628(E-mail)gxj1994@tom.com。
  • 基金资助:

    国家自然科学基金重点资助项目(60535010)

Parameter Estimation of FrequencyHopping Signals Based on |Amelioration Algorithm of WVD

CHEN Chao1a, HAO Yan-zhong1b, GAO Xian-jun1a, SUN Qiang2   

  1. 1aDepartment of Aviation Electronical Engineering|1bDepartment of Aviation Theory, The Aviation University of Air Force, Changchun 130022|China|2Chinese Peoples Liberation Army |94592, Xuzhou 221000|China
  • Online:2010-03-25 Published:2010-06-10

摘要:

针对平滑伪维格纳分布(SPWVD:Smoothed Pseudo WignerVille Distribution)在跳频信号参数估计中存在的分辨率下降和运算量过大等问题,提出基于STFT(Short-Time Fourier Transform)与WVD(Wigner-Ville Distribution)的联合算法(STFT-WVD),实现了跳频周期、跳变时刻和跳频频率等参数的盲估计。在参数估计的过程中,STFTWVD算法有效地抑制了WVD的交叉干扰项,保持了WVD较高的时频分辨率,在运算量上和WVD相近,没有增加运算的复杂程度。仿真实验证明,STFT-WVD比SPWVD具有更好的整体性能,在信噪比优于-1 dB时,能得到更为精准的估计值。

关键词: 跳频信号, 参数估计, 维格纳分布, 联合算法

Abstract:

An amelioration algorithm to the FH(Frequency-Hopping) signals parameter estimation,United Algorithm basted on  STFT(Short-Time Fourier Transform) and WVD(Wigner-Ville Distribution), was proposed to solve the problems of failing timefrequency resolution and oversize operation quantity, which occur in FH signals parameter estimation with smoothed Pseudo WVD (SPWVD). STFT-WVD could achieve FH signals parameters blind estimation successfully, which include hopduration,hoptiming and hopfrequency. In parameter estimation, STFT-WVD suppresses the crossterm interference in WVD effectively, and keeps the excellent timefrequency resolution as WVD. The operation quantity is almost equivalent between STFT-WVD and WVD,the STFT-WVD does not increase the complexity degree of the operation. Finally, the simulation result proves that the holistic performance of STFT-WVD is better than SPWVD, and STFT-WVD can get more precise parameter estimated values while SNR exceeds-1 dB.

Key words: frequency-hopping signals, parameter estimation, Wigner-Ville distribution(WVD), united algorithm

中图分类号: 

  • TN911