naa a22 4500 510798020 CHVBK 20180411083343.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s11277-013-1127-7 doi (NATIONALLICENCE)springer-10.1007/s11277-013-1127-7 Exploiting Temporal Secondary Access Opportunities in Radar Spectrum [Elektronische Daten] [Miurel Tercero, Ki Sung, Jens Zander] In this paper, we quantify the temporal opportunities for secondary access to radar spectrum. Secondary users are assumed to be WLANs which opportunistically share the radar frequency band under the constraint that the aggregate interference does not harm radar operation. Each WLAN device employs dynamic frequency selection (DFS) as a mechanism to protect the radar from the interference. We also consider an advanced interference protection mechanism, which is termed temporal DFS. It exploits the temporal variation of interference power due to the periodic rotation of radar antenna. It is observed that the probability of accessing the radar spectrum is significantly higher when the temporal DFS is used compared to the conventional DFS. As a consequence, more WLANs can utilize the radar spectrum when the temporal DFS mechanism is considered. This shows that having better knowledge of the primary user activity can bring about the increased opportunity of secondary spectrum access to radar band, and thus improve the spectrum utilization. Springer Science+Business Media New York, 2013 Secondary spectrum access nationallicence Radar spectrum nationallicence Aggregate interference nationallicence Dynamic frequency selection nationallicence Temporal opportunity nationallicence Tercero Miurel KTH Royal Institute of Technology, Wireless@KTH, 164 40, Stockholm, Sweden aut Sung Ki KTH Royal Institute of Technology, Wireless@KTH, 164 40, Stockholm, Sweden aut Zander Jens KTH Royal Institute of Technology, Wireless@KTH, 164 40, Stockholm, Sweden aut Wireless Personal Communications Springer US; http://www.springer-ny.com 72/3(2013-10-01), 1663-1674 0929-6212 72:3<1663 2013 72 11277 https://doi.org/10.1007/s11277-013-1127-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-013-1127-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tercero Miurel KTH Royal Institute of Technology, Wireless@KTH, 164 40, Stockholm, Sweden aut NATIONALLICENCE 700 1- Sung Ki KTH Royal Institute of Technology, Wireless@KTH, 164 40, Stockholm, Sweden aut NATIONALLICENCE 700 1- Zander Jens KTH Royal Institute of Technology, Wireless@KTH, 164 40, Stockholm, Sweden aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 72/3(2013-10-01), 1663-1674 0929-6212 72:3<1663 2013 72 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer