Title :
Wavelet Packet Multi-carrier modulation MIMO architecture for spectrum pooling systems
Author :
Lakshmanan, M.K. ; Budiarjo, I. ; Nikookar, H.
Author_Institution :
Dept. of Electr. Eng., Math. & Comput. Sci., Delft Univ. of Technol., Delft, Netherlands
Abstract :
In this paper we demonstrate the operation of a wavelet packet multi-carrier modulation (WPMCM) based cognitive radio (CR) on a multiple-input and multiple-output (MIMO) platform. The wavelet packets are derived from multistage tree-structured paraunitary filter banks. To enable the WPMCM system to co-exist with other licensed users (LU), the WPMCM transmission waveform characteristics are shaped to communicate in the idle time-frequency gaps of the LUs. This is done by vacating WPMCM carriers in and near the region of the LU spectrum. Furthermore, a spectrum estimation unit is tagged to the WPMCM transceiver structure by exploiting the filter bank infrastructure used for wavelet packet demodulation. Thus spectrum analysis is done at no additional cost. Through simulation studies the effectiveness of the system is demonstrated.
Keywords :
MIMO systems; channel bank filters; cognitive radio; modulation; MIMO architecture; cognitive radio; licensed users; paraunitary filter banks; spectrum estimation unit; spectrum pooling systems; time-frequency gaps; wavelet packet multi-carrier modulation; Chromium; Cognitive radio; Costs; Demodulation; Filter bank; MIMO; Spectral analysis; Time frequency analysis; Transceivers; Wavelet packets;
Conference_Titel :
Cognitive Radio Oriented Wireless Networks and Communications, 2009. CROWNCOM '09. 4th International Conference on
Conference_Location :
Hannover
Print_ISBN :
978-1-4244-3423-7
Electronic_ISBN :
978-1-4244-3424-4
DOI :
10.1109/CROWNCOM.2009.5189412
