›› 2013, Vol. 26 ›› Issue (11): 47-.

• 论文 • 上一篇    下一篇

利用ZC序列的OFDM同步及稀疏信道估计

孙虎   

  1. (西安电子科技大学 电子工程学院,陕西 西安 710071)
  • 出版日期:2013-11-15 发布日期:2013-11-19
  • 作者简介:孙虎(1986—),男,硕士研究生。研究方向:无线通信研究。E-mail:spontaou@163.com

OFDM Synchronization and Sparse Channel Estimation by Using ZC Sequences

SUN Hu   

  1. (School of Electronic Engineering,Xidian University,Xi'an 710071,China)
  • Online:2013-11-15 Published:2013-11-19

摘要:

利用ZC序列构造了新导频符号,能够在时域兼具完成OFDM符号定时同步,频偏估计及稀疏信道估计。符号定时同步无需本地序列,频偏估计在时域完成不需要进行FFT,稀疏信道估计则选取优化的由ZC序列形成的感知矩阵对时域信道进行感知,并以OMP算法重构。仿真结果表明,新方法能在时域以较高的精度完成同步和稀疏信道估计。

关键词: 正交频分复用, 同步, 稀疏信道估计, 恒包络零相关序列, 压缩感知, 正交匹配追踪

Abstract:

A new pilot with the ZC sequences is designed for the OFDM system to achieve the symbol timing synchronization,the frequency offset estimation and the sparse channel estimation in the time domain.The symbol timing synchronization is performed without local sequences.The frequency offset estimation is completed without FFT.In the sparse channel estimation,a Compressed Sensing (CS) matrix formed by the ZC sequences is optimized,and the sparse channel in the time domain can be sensed by the CS matrix optimized and reconstructed via Orthogonal Matching Pursuit (OMP) algorithm.Simulation results show that the new pilot can fulfill the synchronization and sparse channel estimation in the time domain precisely.

Key words: OFDM;synchronization;sparse channel estimation;ZC;compressed sensing;OMP

中图分类号: 

  • TN919.3