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{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T14:48:36Z","timestamp":1740149316945,"version":"3.37.3"},"reference-count":37,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2019,7,19]],"date-time":"2019-07-19T00:00:00Z","timestamp":1563494400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["61471393","61771487"],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"This paper investigates the secrecy performance of a cognitive millimeter wave (mmWave) wiretap sensor network, where the secondary transmitter (SU-Tx) intends to communicate with a secondary sensor node under the interference temperature constraint of the primary sensor node. We consider that the random-location eavesdroppers may reside in the signal beam of the secondary network, so that confidential information can still be intercepted. Also, the interference to the primary network is one of the critical issues when the signal beam of the secondary network is aligned with the primary sensor node. Key features of mmWave networks, such as large number of antennas, variable propagation law and sensitivity to blockages, are taken into consideration. Moreover, an eavesdropper-exclusion sector guard zone around SU-Tx is introduced to improve the secrecy performance of the secondary network. By using stochastic geometry, closed-form expression for secrecy throughput (ST) achieved by the secondary sensor node is obtained to investigate secrecy performance. We also carry out the asymptotic analysis to facilitate the performance evaluation in the high transmit power region. Numerical results demonstrate that the interference temperature constraint of the primary sensor node enables us to balance secrecy performance of the secondary network, and provides interesting insights into how the system performance of the secondary network that is influenced by various system parameters: eavesdropper density, antenna gain and sector guard zone radius. Furthermore, blockages are beneficial to improve ST of the secondary sensor node under certain conditions.<\/jats:p>","DOI":"10.3390\/s19143184","type":"journal-article","created":{"date-parts":[[2019,7,22]],"date-time":"2019-07-22T06:55:37Z","timestamp":1563778537000},"page":"3184","source":"Crossref","is-referenced-by-count":2,"title":["On the Performance of Random Cognitive mmWave Sensor Networks"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1999-627X","authenticated-orcid":false,"given":"Yi","family":"Song","sequence":"first","affiliation":[{"name":"School of Physics and Electronic Electrical Engineering, Huaiyin Normal University, Huai\u2019an 223300, China"},{"name":"College of Communications Engineering, Army Engineering University of PLA, No. 88 Houbiaoying, Qinhuai District, Nanjing 210007, China"},{"name":"Jiangsu Province Key Construction Laboratory of Modern Measurement Technology and Intelligent System, Huai\u2019an 223300, China"}]},{"given":"Weiwei","family":"Yang","sequence":"additional","affiliation":[{"name":"College of Communications Engineering, Army Engineering University of PLA, No. 88 Houbiaoying, Qinhuai District, Nanjing 210007, China"}]},{"given":"Zhongwu","family":"Xiang","sequence":"additional","affiliation":[{"name":"College of Communications Engineering, Army Engineering University of PLA, No. 88 Houbiaoying, Qinhuai District, Nanjing 210007, China"}]},{"given":"Biao","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Electronic and Information, Jiangsu University of Science and Technology, Zhenjiang 212003, China"}]},{"given":"Yueming","family":"Cai","sequence":"additional","affiliation":[{"name":"College of Communications Engineering, Army Engineering University of PLA, No. 88 Houbiaoying, Qinhuai District, Nanjing 210007, China"}]}],"member":"1968","published-online":{"date-parts":[[2019,7,19]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"679","DOI":"10.1109\/JSAC.2018.2825560","article-title":"A Survey of Physical Layer Security Techniques for 5G Wireless Networks and Challenges Ahead","volume":"36","author":"Wu","year":"2018","journal-title":"IEEE J. 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