Matched Filter Based Spectrum Sensing When Primary User Has Multiple Power Levels

被引:37
|
作者
Zhang Xinzhi [1 ]
Gao Feifei [2 ]
Chai Rong [1 ]
Jiang Tao [3 ]
机构
[1] Chongqing Univ Posts & Telecommun, Key Lab Mobile Commun Technol, Chongqing 400065, Peoples R China
[2] Tsinghua Univ, Dept Automat, TNList, State Key Lab Intelligent Technol & Syst, Beijing, Peoples R China
[3] Huazhong Univ Sci & Technol, Dept Elect & Informat, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China
基金
中国国家自然科学基金; 北京市自然科学基金;
关键词
spectrum sensing; power recognition; matched filter; multiple primary transmit power; multiple hypothesis testing; power mask; COGNITIVE RADIO; ENERGY DETECTION; ALLOCATION; NETWORKS;
D O I
10.1109/CC.2015.7084399
中图分类号
TN [电子技术、通信技术];
学科分类号
0809 ;
摘要
In this paper, we investigate the matched filter based spectrum sensing in a more reasonable cognitive radio (CR) scenario when the primary user (PU) has more than one transmit power levels, as regulated in most standards, i.e., IEEE 802.11 Series, GSM, LTE, LTE-A, etc. This new multiple primary transmit power (MPTP) scenario is specialized by two different targets: detecting the presence of PU and identifying the power level. Compared to the traditional binary sensing where only the presence of PU is checked, SU may attain more information about the primary network (making CR more "intelligent") and design the subsequent optimization strategy. The key technology is the multiple hypothesis testing as opposed to the traditional binary hypothesis testing. We discuss two situations under whether the channel phase is known or not, and we derive the closed form solutions for decision regions and several performance metrics, from which some interesting phenomenons are observed and the related discussions are presented. Numerical examples are provided to corroborate the proposed studies.
引用
收藏
页码:21 / 31
页数:11
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