Iterative optimization of detection threshold and throughput for secondary users in multiband cognitive radio systems  

作　　者：SHI Cong WANG Ying WANG Tan ZHANG Ping 

机构地区：[1]Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China [2]Key Laboratory of Universal Wireless Communication, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2011年第6期27-37,共11页中国邮电高校学报（英文版）

基　　金：supported by the Key Project (2010ZX03003-001-01);the Hi-Tech Research and Development Program of China (2009AA011802);Program for New Century Excellent Talents in University (NCET)

摘　　要：In cognitive radio （CR） systems, efficient spectrum sensing ensures the secondary user （SU） to successfully access the spectrum hole. Typically, the detection problem has been considered separately from the optimization of transmission strategy. However, in practice, due to non-zero probabilities of miss detection and false alarm, the sensing phase has an impact on the throughput of SUs as well as on the transmission of primary user （PU）. In this paper, using energy detection, we maximize the total throughput of SUs by jointly optimizing the detection threshold and transmission strategy in multiband CR systems. A set of iteration based algorithms are proposed to solve this mix-integer programming problem, which show better performance compared with uniform detection threshold selection algorithm suggested by IEEE 802.22 standard.In cognitive radio （CR） systems, efficient spectrum sensing ensures the secondary user （SU） to successfully access the spectrum hole. Typically, the detection problem has been considered separately from the optimization of transmission strategy. However, in practice, due to non-zero probabilities of miss detection and false alarm, the sensing phase has an impact on the throughput of SUs as well as on the transmission of primary user （PU）. In this paper, using energy detection, we maximize the total throughput of SUs by jointly optimizing the detection threshold and transmission strategy in multiband CR systems. A set of iteration based algorithms are proposed to solve this mix-integer programming problem, which show better performance compared with uniform detection threshold selection algorithm suggested by IEEE 802.22 standard.

关 键 词：iteration optimization energy detection resource allocation multiband cognitive radio system 

分 类 号：TN92[电子电信—通信与信息系统] TM732[电子电信—信息与通信工程]