东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (4): 8-15.DOI: 10.12068/j.issn.1005-3026.2025.20230334

• 信息与控制 • 上一篇    下一篇

基于J-SAWOMP算法的UFMC系统信道估计

季策, 张思雨   

  1. 东北大学 计算机科学与工程学院,辽宁 沈阳 110169
  • 收稿日期:2023-12-15 出版日期:2025-04-15 发布日期:2025-07-01
  • 作者简介:季 策(1969—),女,辽宁沈阳人,东北大学副教授,博士.
  • 基金资助:
    国家自然科学基金资助项目(62172084)

Channel Estimation for UFMC System Based on J-SAWOMP Algorithm

Ce JI, Si-yu ZHANG   

  1. School of Computer Science & Engineering,Northeastern University,Shenyang 110169,China. Corresponding author: ZHANG Si-yu,E-mail: 1789837819@qq. com
  • Received:2023-12-15 Online:2025-04-15 Published:2025-07-01

摘要:

通用滤波多载波(universal filtered multi-carrier,UFMC)是一种面向5G通信系统的多载波调制技术,为了验证UFMC系统的优势并进一步提升其信道估计效果,在UFMC系统下提出了一种基于Jaccard相似度准则的自适应正交匹配追踪算法(J-SAWOMP).该算法采用Jaccard相似度度量准则计算原子间的相似系数,优化了匹配原子的筛选方式,同时采用阈值弱选择方式选出最佳原子,最后利用回溯思想进一步筛选相关性更好的原子,提高信号重构精度.实验结果表明,与经典匹配追踪算法相比,J-SAWOMP在UFMC系统下具有更好的信道估计性能.

关键词: Jaccard相似度, 匹配追踪, 信道估计, 通用滤波多载波, 自适应

Abstract:

Universal filtered multi-carrier (UFMC) is a multi-carrier modulation technology for 5G communication systems. In order to verify the advantages of the UFMC system and further improve the channel estimation effect, an adaptive orthogonal matching pursuit algorithm (J-SAWOMP) based on Jaccard similarity criterion is proposed, which uses the Jaccard similarity metric criterion to calculate the similarity coefficient between atoms, and optimizes the screening method of matching atoms, and selects the best atoms by using the weak threshold selection method. Finally, the backtracking idea is used to further select the atoms with better correlation to improve the accuracy of signal reconstruction. Experimental results show that compared with the classical match-chase algorithm, the J-SAWOMP algorithm has better channel estimation performance under the UFMC system.

Key words: Jaccard similarity, matching pursuit, channel estimation, universal filtered multi-carrier(UFMC), adaptive

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