J4 ›› 2012, Vol. 39 ›› Issue (2): 12-16+65.doi: 10.3969/j.issn.1001-2400.2012.02.003

• Original Articles • Previous Articles     Next Articles

Blind Rake receiver for TH-UWB systems with multi-user interference

KANG Xiaofei1,2;YANG Jiawei1;LIU Jian2   

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. College of Comm. and Info. Eng., Xi'an Univ. of Sci. and Tech.,  Xi'an  710054, China)
  • Received:2010-11-26 Online:2012-04-20 Published:2012-05-21
  • Contact: KANG XiaoFei E-mail:kangxiaofei@sina.com

Abstract:

A novel blind Rake receiver is proposed in order to suppress both multi-user interference (MUI) and inter symbol interference (ISI) for time-hopping ultra-wideband (TH-UWB) systems. The receiver firstly exploits the properties of the desired user time-hopping sequence to figure out a filter for eliminating partial MUI and ISI, and then uses the PASTd algorithm to estimate the channel and perform maximal ratio combining (MRC) to further improve the signal to interference plus noise ratio (SINR). Simulation results show that the proposed blind Rake receiver achieves a significant performance gain in comparison with the conventional receiver and Rake receiver, and can converge at the steady state rapidly. Furthermore, it requires less priori knowledge and has lower complexity.

Key words: ultra-wideband (UWB), time hopping (TH), multi-user interference (MUI), projection approximation subspace tracking with deflation (PASTd)

CLC Number: 

  • TN911.23