中国邮电高校学报(英文) ›› 2009, Vol. 16 ›› Issue (3): 45-51.doi: 10.1016/S1005-8885(08)60226-5

• Wireless • 上一篇    下一篇

Direct-sequence codes based blind synchronization algorithm for UWB systems

乔永伟,吕铁军,任志远   

  1. School of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-06-30
  • 通讯作者: 乔永伟

Direct-sequence codes based blind synchronization algorithm for UWB systems

QIAO Yong-wei, LÜ Tie-jun, REN Zhi-yuan   

  1. School of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-06-30
  • Contact: QIAO Yong-wei

摘要:

A new blind (non-data-aided) synchronization algorithm based on direct-sequence (DS) codes is proposed for ultra-wideband (UWB) systems. The proposed approach fully exploits prior knowledge of DS codes and bypasses channel estimation. The real-time acquisition is achieved using integrating-and-dumping (I&D) operation and DS codes matching filter. Because of pseudo randomicity and periodicity of DS codes, both the speed and the accuracy of synchronization are improved significantly. A lower bound on the acquisition probability of the proposed approach is also derived. Simulations confirm performance improvement of the proposed algorithm relative to existing alternatives in terms of acquisition probability, normalized mean square error (NMSE), and bit error rate (BER).

关键词:

UWB;systems,;synchronization,;DS;codes

Abstract:

A new blind (non-data-aided) synchronization algorithm based on direct-sequence (DS) codes is proposed for ultra-wideband (UWB) systems. The proposed approach fully exploits prior knowledge of DS codes and bypasses channel estimation. The real-time acquisition is achieved using integrating-and-dumping (I&D) operation and DS codes matching filter. Because of pseudo randomicity and periodicity of DS codes, both the speed and the accuracy of synchronization are improved significantly. A lower bound on the acquisition probability of the proposed approach is also derived. Simulations confirm performance improvement of the proposed algorithm relative to existing alternatives in terms of acquisition probability, normalized mean square error (NMSE), and bit error rate (BER).

Key words:

UWB systems;synchronization;DS codes