Title :
Deepen spectrum notch of CR signals with Partial Response System
Author :
Liang, Bing ; Zhang, Luyong ; Zhou, Zheng
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
Partial response system (PRS) is introduced to OFDM technology to deepen spectrum notch when some subcarriers are turned off. By this, controllable interference which can be removed in the receiver without enhancing system complexity, is introduced to the cognitive radio (CR) signals. It can change spectrum shape of subcarriers of OFDM signals and deepen the spectrum notch when turning off some subcarriers. Therefore, this method can lower the interference between primary users and secondary ones in CR systems. Some simulation results are shown in this paper to approve the performance of this method.
Keywords :
OFDM modulation; cognitive radio; interference suppression; spectral analysis; CR signals; OFDM technology; cognitive radio; deepen spectrum notch; interference suppression; partial response system; Bandwidth; Chromium; Cognitive radio; Interference; OFDM modulation; Protection; Transmitters; Turning; Wireless communication; Wireless networks; Cognitive Radio; OFDM; Partial Response System; Spectrum notch;
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.2009.5188965
