Title :
OFDM Subcarriers Coding for Enhancing Spectrum Notch
Author :
Liu, Qi ; Zhou, Zheng ; Kan, Shaohua ; Ye, Yabin
Author_Institution :
Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
Because of its flexible spectrum shaping, OFDM technologies can be used for cognitive radio as signaling method. Spectrum notches can be generated through turning off subcarriers to protect primary users (licensee users), but the intercarrier interference may limit the notch depth. This paper focuses on the enhancing methods to deepen spectrum notch and proposes two kinds of OFDM subcarriers coding methods. These methods can deepen spectrum notch efficiently without causing much system complexity. They also have respective advantages that can be applied to different situations.
Keywords :
OFDM modulation; cognitive radio; encoding; radio spectrum management; telecommunication signalling; OFDM subcarriers coding; cognitive radio; flexible spectrum shaping; intercarrier interference; signaling method; spectrum notch; Bandwidth; Chromium; Cognitive radio; Interference cancellation; OFDM; Protection; Shape control; Tin; Turning; Wireless communication;
Conference_Titel :
Communications and Information Technologies, 2008. ISCIT 2008. International Symposium on
Conference_Location :
Lao
Print_ISBN :
978-1-4244-2335-4
Electronic_ISBN :
978-1-4244-2336-1
DOI :
10.1109/ISCIT.2008.4700165
