J4 ›› 2015, Vol. 42 ›› Issue (4): 8-13.doi: 10.3969/j.issn.1001-2400.2015.04.002

• 研究论文 • 上一篇    下一篇



  1. (西安电子科技大学 雷达信号处理国家重点实验室,陕西 西安  710071)
  • 收稿日期:2014-03-12 出版日期:2015-08-20 发布日期:2015-10-12
  • 通讯作者: 吴凯
  • 作者简介:吴凯(1990-),男,西安电子科技大学博士研究生,E-mail:ookaykay@163.com.
  • 基金资助:

    国家自然科学基金资助项目(61201283, 61201285);新世纪优秀人才支持计划资助项目(NCET-09-0630)

Design and application of the allpass fractional delay filter

WU Kai;SU Tao   

  1. (National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an  710071, China)
  • Received:2014-03-12 Online:2015-08-20 Published:2015-10-12
  • Contact: WU Kai



关键词: 数字波束形成, 宽带, 分数延时, 遗传算法


By analyzing the design and solving of the allpass fractional delay filter (APFDF) based on the weighted least square method, a new APFDF design procedure adopting the modified genetic algorithm based on elite strategy is proposed, which assures the convergence and stability in obtaining the filter's coefficients. The hybrid genetic operators speed up the convergence of genetic operation towards the global optimal solution and prevent it from pondering around the solution. Simulation results show that the allpass fractional delay filters designed are of low order and high precision. Applied in wideband digital beamforming (WDBF), the aperture transition and frequency dispersion problems are solved successfully and the beam formed approximates the ideal beam.

Key words: digital beamforming, wideband, fractional delay, genetic algorithm


  • TN958.92