Acta Metallurgica Sinica(English letters) ›› 2011, Vol. 18 ›› Issue (6): 38-43.doi: 10.1016/S1005-8885(10)60120-3

• Wireless • 上一篇    下一篇

Blind adaptive receiver based on RLS-CMA for TH-UWB system

康晓非,杨家玮,MEN Shuo   

  1. State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an 710071, China
  • 收稿日期:2011-03-10 修回日期:2011-07-15 出版日期:2011-12-31 发布日期:2011-12-30
  • 通讯作者: 康晓非 E-mail:kangxiaofei@sina.com
  • 基金资助:

    This work was supported by the National Science Fund for Distinguished Young Scholars (60725105), the National Basic Research Program of China (2009CB320404), the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) (IRT0852), the 111 Project (B08038) and Scientific Research Program Funded by Shaanxi Provincial Education Commission (2010JK666).

Blind adaptive receiver based on RLS-CMA for TH-UWB system

  1. State Key Laboratory of Integrated Service Networks, Xidian University, Xi’an 710071, China
  • Received:2011-03-10 Revised:2011-07-15 Online:2011-12-31 Published:2011-12-30
  • Contact: Xiao-Fei KANG E-mail:kangxiaofei@sina.com
  • Supported by:

    This work was supported by the National Science Fund for Distinguished Young Scholars (60725105), the National Basic Research Program of China (2009CB320404), the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT) (IRT0852), the 111 Project (B08038) and Scientific Research Program Funded by Shaanxi Provincial Education Commission (2010JK666).

摘要:

A novel receiver is proposed in this paper that uses the blind adaptive multi-user detection (MUD) technique to deal with the presence of multiple-access interference (MAI) and inter-symbol interference (ISI) in terms of high speed time-hopping ultra-wideband (TH-UWB) system. The receiver firstly adopts constrained recursive least squares constant modulus algorithm (RLS-CMA) to conduct adaptive decorrelation for eliminating MAI and ISI, and then uses projection approximation subspace tracking with deflation (PASTd) algorithm to launch channel estimation, do maximal ratio combining (MRC) and improve signal to interference plus noise ratio (SINR). The simulation results show that the proposed receiver can go to convergence rapidly under all four IEEE’s UWB channel models, the bit error ratio (BER) performance is better than that of the traditional receiver and rake receiver.

关键词:

ultra-wideband (UWB), time hopping (TH), recursive least squares (RLS), constant modulus algorithm (CMA), PASTd

Abstract:

A novel receiver is proposed in this paper that uses the blind adaptive multi-user detection (MUD) technique to deal with the presence of multiple-access interference (MAI) and inter-symbol interference (ISI) in terms of high speed time-hopping ultra-wideband (TH-UWB) system. The receiver firstly adopts constrained recursive least squares constant modulus algorithm (RLS-CMA) to conduct adaptive decorrelation for eliminating MAI and ISI, and then uses projection approximation subspace tracking with deflation (PASTd) algorithm to launch channel estimation, do maximal ratio combining (MRC) and improve signal to interference plus noise ratio (SINR). The simulation results show that the proposed receiver can go to convergence rapidly under all four IEEE’s UWB channel models, the bit error ratio (BER) performance is better than that of the traditional receiver and rake receiver.

Key words:

ultra-wideband (UWB), time hopping (TH), recursive least squares (RLS), constant modulus algorithm (CMA), PASTd