Title :
Performance comparison of time delay estimation for whole and dispersed spectrum utilization in cognitive radio systems
Author :
Celebi, Hasari ; Qaraqe, Khalid A. ; Arslan, Huseyin
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas A&M Univ. at Qatar, Doha, Qatar
Abstract :
In cognitive radio systems, information is transmitted and received over multiple dispersed bands using dispersed spectrum utilization approach whereas information is transmitted and received over a single band using whole spectrum utilization approach. In this paper, performance of both approaches are compared theoretically considering CRLB and maximum likelihood (ML) method for time delay estimation. The results show that dispersed spectrum utilization methods have a great potential to exploit the efficiency of spectrum utilization and support goal driven and autonomous cognitive radio systems.
Keywords :
cognitive radio; delay estimation; frequency allocation; maximum likelihood estimation; Cramer-Rao lower bound approach; cognitive radio system; dispersed spectrum utilization approach; maximum likelihood method; time delay estimation; AWGN channels; Chromium; Cognitive radio; Computer science education; Delay effects; Delay estimation; Maximum likelihood estimation; OFDM; Performance analysis; Signal processing;
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.2009.5189398
