@article{oai:niigata-u.repo.nii.ac.jp:00001874,
 author = {Rahman, Mohammad Azizur and Sasaki, Shigenobu and Zhou, Jie and Muramatsu, Shogo and Kikuchi, Hisakazu},
 issue = {7},
 journal = {IEICE transactions on fundamentals of electronics, communications and computer sciences, IEICE transactions on fundamentals of electronics, communications and computer sciences},
 month = {Jul},
 note = {Performance of selective Rake (SRake) receiver is evaluated for direct sequence ultra wideband (DS-UWB) communications considering an independent Rayleigh channel having exponentially decaying power delay profile (PDF). BEP performances are shown. The results obtained are compared with similar results in a channel having flat PDP. Assumption of a flat PDP is found to predict the optimum spreading bandwidth to be lower and sub-optimum operating performance beyond optimum spreading bandwidth to be severely worse than that is achievable in a channel having exponentially decaying PDP by employing an SRake receiver having fixed number of combined paths. Optimum spreading bandwidth for SRake in a channel having exponentially decaying PDP is shown to be much larger than the one in a channel having flat PDP; that is specifically a good-news for UWB communications. Effects of partial band interference are also investigated. Interference is found to be less effective in exponentially decaying PDP.},
 pages = {1742--1746},
 title = {Evaluation of selective Rake receiver in direct sequence ultra wideband communications},
 volume = {E87-A},
 year = {2004}
}