Research Article
Transmit Power Allocation among PSWF-based Pulse Wavelets in Cognitive UWB Radio
@INPROCEEDINGS{10.1109/CROWNCOM.2006.363458, author={Xiaofei ZHOU and Honggang ZHANG and Imrich CHLAMTAC}, title={Transmit Power Allocation among PSWF-based Pulse Wavelets in Cognitive UWB Radio}, proceedings={1st International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2007}, month={5}, keywords={Cognitive radio Eigenvalues and eigenfunctions Fading Filling Pulse modulation Pulse shaping methods Shape Throughput Ultra wideband communication Ultra wideband technology}, doi={10.1109/CROWNCOM.2006.363458} }- Xiaofei ZHOU
Honggang ZHANG
Imrich CHLAMTAC
Year: 2007
Transmit Power Allocation among PSWF-based Pulse Wavelets in Cognitive UWB Radio
CROWNCOM
IEEE
DOI: 10.1109/CROWNCOM.2006.363458
Abstract
Ultra wideband (UWB) technology has been considered as one of the suitable transmission techniques for implementing a cognitive radio system, where spectrum-agile UWB waveforms achieve adaptation features. One approach for designing such waveforms relies on orthogonally combining PSWF-based pulse wavelets. In a cognitive UWB radio environment with N users, with respect to the case of one sub-band accessed by one user, whose transmitting signal is M-ary pulse shape modulated, we get different eigenvalues by transmitting these pulses in a multipath fading channel, we propose water filling scheme, depending on the different eigenvalues, to optimize the power allocation among them. Simulation results show that the scheme improves the sub-band channel data throughput compared with the scheme that power is equal allocated among these pulse wavelets, when the SNR is low, which is the normal case in UWB communications
