中国邮电高校学报(英文版) ›› 2016, Vol. 23 ›› Issue (2): 1-5.doi: 10.1016/S1005-8885(16)60014-6

• Wireless •    下一篇

Suppression of Doppler dispersion in the target detection with multi-carrier signal

  

  1. 桂林电子科技大学
  • 收稿日期:2016-01-07 修回日期:2016-03-21 出版日期:2016-04-28 发布日期:2016-04-28
  • 通讯作者: 郑霖 E-mail:gwzheng@gmail.com
  • 基金资助:

    国家自然科学基金;国家自然科学基金;广西无线宽带通信与信号处理重点实验室基金;通信网信息传输与分发技术重点实验室开放课题基金

Suppression of Doppler dispersion in the target detection with multi-carrier signal

  • Received:2016-01-07 Revised:2016-03-21 Online:2016-04-28 Published:2016-04-28
  • Supported by:

    ;Foundation of Key Lab. of Guangxi Broadband Wireless Communication & Signal Processing;Foundation of open project of Science and Technology on Information Transmission and Dissemination in Communication Networks Lab

摘要: The output of each individual channel in multi-carrier system can be processed to detect moving targets by the approach used in tradition narrowband pulse Doppler (PD) radar and then using non-coherent integration to promote signal noise ratio (SNR). However, due to the difference of Doppler on sub-carriers, there occurs Doppler dispersion during non-coherent integration, which causes attenuation and extension on target’s amplitude. Especially, it can deteriorate performance of target detection under wideband multicarrier system or fast-moving target scene. In this paper, a modified Fourier transform kernel is proposed to solve Doppler dispersion for multi-carrier chirp signal. It can achieve accumulation at the same frequency point for the target’s Doppler of each subcarrier. The simulation results indicate that this method can effectively eliminate the integral loss caused by Doppler dispersion.

关键词: multi-carrier chirp, Doppler dispersion, pulse Doppler (PD), Doppler frequency shift (DFS)

Abstract: The output of each individual channel in multi-carrier system can be processed to detect moving targets by the approach used in tradition narrowband pulse Doppler (PD) radar and then using non-coherent integration to promote signal noise ratio (SNR). However, due to the difference of Doppler on sub-carriers, there occurs Doppler dispersion during non-coherent integration, which causes attenuation and extension on target’s amplitude. Especially, it can deteriorate performance of target detection under wideband multicarrier system or fast-moving target scene. In this paper, a modified Fourier transform kernel is proposed to solve Doppler dispersion for multi-carrier chirp signal. It can achieve accumulation at the same frequency point for the target’s Doppler of each subcarrier. The simulation results indicate that this method can effectively eliminate the integral loss caused by Doppler dispersion.

Key words: multi-carrier chirp, Doppler dispersion, pulse Doppler (PD), Doppler frequency shift (DFS)

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