An Efficient Filter Banks Based Multicarrier System in Cognitive Radio Networks (invited paper)
release_ahw7app26zhvpkn33almeeehp4
by
H. Zhang, Z. Zhao, Y. Cui
2010 Volume 19, p479-487
Abstract
In cognitive radio techniques, OFDM is usually regarded as the physical layer candidate. However, the weaknesses of the OFDM technique, i.e., using plain FFT for spectral analysis , decreased bandwidth efficiency due to CP (cyclic prefix), high out-of-band emission, have been pointed out and the introduction of filter banks based multicarrier (FBMC) system has been advocated by a number of authors. In this paper, we propose an efficient FBMC system for cognitive radio network. At the transmitter, we propose a decimation transform decomposition method to eliminate the unnecessary zero operations. At the receiver, we utilize the analysis filter banks to sense the spectrum bands. In order to conquer the shortages of the traditional filter banks, we propose a multistage analysis filter banks, which can reduce the computational complexity while improve the detection precision when used to sense the spectrum bands. And with an adaptive threshold scheme in the power estimator, the threshold can be kept very close to the noise power, which can increase the detection probability especially in the condition of low SNR.
In text/plain
format
Archived Files and Locations
application/pdf 883.6 kB
file_prqam3l5gjayjkkt4zosokmqyq
|
www.radioeng.cz (publisher) web.archive.org (webarchive) |
Open Access Publication
In DOAJ
In ISSN ROAD
In Keepers Registry
ISSN-L:
1210-2512
access all versions, variants, and formats of this works (eg, pre-prints)