Transmit Power Allocation among PSWF-based Pulse Wavelets in Cognitive UWB Radio

Xiaofei  ZHOU; Honggang  ZHANG; Imrich  CHLAMTAC

1st International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications

Research Article

Transmit Power Allocation among PSWF-based Pulse Wavelets in Cognitive UWB Radio

Cite: BibTeX Plain Text

@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

Xiaofei ZHOU¹^,*, Honggang ZHANG¹^,*, Imrich CHLAMTAC¹^,*

1: CREATE-NET, Via Solteri 38, 38100 Trento, Italy.

*Contact email: xiaofei.zhou@create-net.org, honggang.zhang@create-net.org, imrich.chlamtac@create-net.org

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

Keywords: Cognitive radio Eigenvalues and eigenfunctions Fading Filling Pulse modulation Pulse shaping methods Shape Throughput Ultra wideband communication Ultra wideband technology

Published: 2007-05-21
Publisher: IEEE

: http://dx.doi.org/10.1109/CROWNCOM.2006.363458