武汉大学电子信息学院,湖北,武汉,430072
纸质出版:2014
移动端阅览
徐兴安, 吴雄斌, 陈骁锋, 等. 一种基于S变换的高频地波雷达瞬态干扰抑制方法[J]. 电子学报, 2014,42(3):602-606.
XU Xing-an, WU Xiong-bin, CHEN Xiao-feng, et al. An Instantaneous Interference Suppression Approach Based on S Transforms[J]. Acta Electronica Sinica, 2014, 42(3): 602-606.
徐兴安, 吴雄斌, 陈骁锋, 等. 一种基于S变换的高频地波雷达瞬态干扰抑制方法[J]. 电子学报, 2014,42(3):602-606. DOI: 10.3969/j.iss.0372-2012-2014.03.028.
XU Xing-an, WU Xiong-bin, CHEN Xiao-feng, et al. An Instantaneous Interference Suppression Approach Based on S Transforms[J]. Acta Electronica Sinica, 2014, 42(3): 602-606. DOI: 10.3969/j.iss.0372-2012-2014.03.028.
针对高频地波雷达中出现的瞬态干扰问题,提出了基于S变换(Stockwell transforms)的瞬态干扰抑制方法.首先分析了两次FFT信号处理机制下瞬态干扰的时频特征;然后应用S变换对雷达信号进行时频分析,利用瞬态干扰在时频维扩展性不同的特点,实现瞬态干扰的检测;最后应用三层BP(Back Propagation)神经网络对海洋回波信号进行预测和恢复.该方法避免了海杂波抑制的步骤,具有计算量小、信号损失小的优点.现场实测数据分析表明,该方法能够有效抑制瞬态干扰,使回波多普勒谱信噪比提高达10dB,有效提高了雷达的抗干扰能力.
A new method based on S tansforms is proposed to suppress instantaneous interference for high frequency surface wave radar (HFSWR) application.The characteristics of instantaneous interference in time and Doppler domain were discussed within the twice-FFT signal processing framework;then S transforms was applied to outline the characteristics of instantaneous interference in time-frequency domain for interference detection and excision;finally
BP neural network was used to recover the sea echo signals.Experiment results show that the anti-interference ability is enhanced by this method
and the SNR of Doppler spectrum is improved for about 10dB.
0
浏览量
2
下载量
3
CSCD
关联资源
相关文章
相关作者
相关机构
京公网安备11010802024621