@article{(Open Science Index):https://publications.waset.org/pdf/9846, title = {Increasing the Efficiency of Rake Receivers for Ultra-Wideband Applications}, author = {Aimilia P. Doukeli and Athanasios S. Lioumpas and George K. Karagiannidis and Panayiotis V. Frangos and P. Takis Mathiopoulos}, country = {}, institution = {}, abstract = {In diversity rich environments, such as in Ultra- Wideband (UWB) applications, the a priori determination of the number of strong diversity branches is difficult, because of the considerably large number of diversity paths, which are characterized by a variety of power delay profiles (PDPs). Several Rake implementations have been proposed in the past, in order to reduce the number of the estimated and combined paths. To this aim, we introduce two adaptive Rake receivers, which combine a subset of the resolvable paths considering simultaneously the quality of both the total combining output signal-to-noise ratio (SNR) and the individual SNR of each path. These schemes achieve better adaptation to channel conditions compared to other known receivers, without further increasing the complexity. Their performance is evaluated in different practical UWB channels, whose models are based on extensive propagation measurements. The proposed receivers compromise between the power consumption, complexity and performance gain for the additional paths, resulting in important savings in power and computational resources.}, journal = {International Journal of Electrical and Computer Engineering}, volume = {3}, number = {7}, year = {2009}, pages = {1490 - 1494}, ee = {https://publications.waset.org/pdf/9846}, url = {https://publications.waset.org/vol/31}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 31, 2009}, }