Title :
MRC-Rake-LMS-Equalizer Performance for UWB
Author :
Wan, Quan ; Dinh, Anh
Author_Institution :
Dept. of Electr. & Comput. Eng., Saskatchewan Univ., Saskatoon, Sask.
Abstract :
This paper proposes a receiver structure to reduce ISI for high speed UWB transmission. The receiver consists of an N-selective maximum ratio combiner and a least-mean-square adaptive equalizer. This sub-optimal rake receiver processes only a subset of the available resolved multi-path components. A sliding correlation algorithm is used to obtain parameters for the N strongest paths. The LMS equalizer is designed to assist the receiver to reduce ISI. Benefit of this adaptive scheme is the equalizer does not need to know parameters of the entire multi-path component. A short training period with known information sequence is required to initially adjust the tap weights. Simulation results for N=8, 16, and 32 at different values of SNR show a significant improvement in BER. There is only a small trade off in system complexity in obtaining such gain
Keywords :
adaptive equalisers; correlation methods; diversity reception; least mean squares methods; multipath channels; radio receivers; ultra wideband communication; LMS; MRC; N-selective maximum ratio combiner; UWB transmission; adaptive scheme; information sequence; least-mean-square adaptive equalizer; multipath components; rake receiver process; sliding correlation algorithm; ultra wideband; Adaptive equalizers; Correlators; Energy capture; Energy resolution; Fading; Intersymbol interference; Least squares approximation; Multipath channels; RAKE receivers; Signal resolution;
Conference_Titel :
Communication systems, 2006. ICCS 2006. 10th IEEE Singapore International Conference on
Conference_Location :
Singapore
Print_ISBN :
1-4244-0411-8
Electronic_ISBN :
1-4244-0411-8
DOI :
10.1109/ICCS.2006.301444
