Weighted Rake receiver for UWB communications with channel estimation errors

In this paper, a new weighted max-ratio-combining (MRC) selective Rake (SRake) receiver is proposed for a pulse based UWB system with channel estimation errors. Thanks to the prior knowledge of the multipath channel, our new method can further improve the BER performance compared with the conventional MRC Rake receiver. We analyze the new scheme in a theoretical way and the performance improvement is also evaluated in the IEEE 802.15.3a ultra-wideband channel model through computer simulation.

[1]  Umberto Mengali,et al.  Multipath channel estimation for the uplink of a DS-CDMA system , 2002, 2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333).

[2]  Moe Z. Win,et al.  Performance of low-complexity RAKE reception in a realistic UWB channel , 2002, 2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333).

[3]  Moe Z. Win,et al.  On the robustness of ultra-wide bandwidth signals in dense multipath environments , 1998, IEEE Communications Letters.

[4]  Huseyin Arslan,et al.  RAKE receiver finger assignment for ultra-wideband radio , 2003, 2003 4th IEEE Workshop on Signal Processing Advances in Wireless Communications - SPAWC 2003 (IEEE Cat. No.03EX689).

[5]  A.A.M. Saleh,et al.  A Statistical Model for Indoor Multipath Propagation , 1987, IEEE J. Sel. Areas Commun..

[6]  Bartosz Mielczarek,et al.  Performance of coherent UWB Rake receivers with channel estimators , 2003, 2003 IEEE 58th Vehicular Technology Conference. VTC 2003-Fall (IEEE Cat. No.03CH37484).

[7]  V. Srinivasa Somayazulu,et al.  RAKE performance for a pulse based UWB system in a realistic UWB indoor channel , 2003, IEEE International Conference on Communications, 2003. ICC '03..

[8]  Moe Z. Win,et al.  On the energy capture of ultrawide bandwidth signals in dense multipath environments , 1998, IEEE Communications Letters.