DocumentCode :
3623853
Title :
A Low Complexity Simulation Algorithm for TH-UWB MMSE RAKE Receiver
Author :
Marina Marjanovic;Jose Manuel Paez Borrallo
Author_Institution :
Centro de Dom?tica Integral, Universidad Polit?cnica de Madrid, 28040 Madrid, Spain. email: marina@gaps.ssr.upm.es
fYear :
2006
Firstpage :
702
Lastpage :
707
Abstract :
In this work, we implement a MMSE RAKE receiver for ultra-wideband (UWB) system using a new time-hopping system simulator. It is known that MMSE receiver has the best performance in terms of signal-to-noise-plus-interference-ratio (SINR) at the expense of high computational complexity. In addition, in order to process ultra-wideband signals, an extremely large sampling rate is mandatory. Therefore, in order to compute bit error rate (BER) curves, simulation time can be very long. Since the transmitted waveform is "hidden" in the transmitted-distorted-received waveform (TDR), as it will be shown in this work, a typical multiuser structure does not exist and the implementation of any multiuser detector in this algorithm might be a difficult issue. Therefore, applying this method, in this paper, a new approach of multiuser detection is achieved. With our approach, it is possible to reduce the simulation process significantly by avoiding any convolution operation, which is the most time-consuming. This algorithm takes advantage of some of the properties of time-hopping ultra-wideband (TH-UWB) systems in order to improve all the previous designs by several orders of magnitude, independently of the sampling rate, in terms of a very straightforward and fast processing. Relying on this approach, the number of simulation operations needed to evaluate MMSE receiver matrix are reduced. Thus, it is possible to process a large number of samples and to accurately estimate low BER in a short time application. Additionally, we derived a theoretical formula of the performance of the MMSE detector for PPM IR-TH-UWB based on this new approach. This formula might be valid for both, AWGN and multipath channel propagation. Simulations are provided in order to validate this approach
Keywords :
"Fading","Multipath channels","Computational modeling","Ultra wideband technology","Bit error rate","Detectors","AWGN","RAKE receivers","Signal to noise ratio","Computational complexity"
Publisher :
ieee
Conference_Titel :
Signal Processing and Information Technology, 2006 IEEE International Symposium on
ISSN :
2162-7843
Print_ISBN :
0-7803-9753-3
Type :
conf
DOI :
10.1109/ISSPIT.2006.270890
Filename :
4042332
Link To Document :
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