Physical Layer Coexistence: WLAN/Radar Case Study
Spectrum sharing of 802.11 wireless local area network (WLAN) and radars operating in co-/adjacent channel scenarios (notably 5 GHz) is a problem of considerable importance that requires new innovations. The spectrum sharing explored in this chapter is ba
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Morteza Mehrnoush and Sumit Roy
Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DFS Requirement in 5 GHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Radar Pulse Detection Using Quiet Periods in Wi-Fi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Model of Wi-Fi Network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Challenges in Radar Pulse Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wi-Fi Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Analytical Evaluation of Radar Detection in Wi-Fi Quiet Periods . . . . . . . . . . . . . . . . . . . . Detection Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Simulation Results and Discussion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WLAN Modifications for Radar Interference Mitigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . WLAN Generic System Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Exclusion Region Calculation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wi-Fi System Modifications for Interference Mitigation . . . . . . . . . . . . . . . . . . . . . . . . . . . Simulation Results for Interference Mitigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Radar Pulse Detection During Wi-Fi Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Conclusion and Future Directions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Abstract
Spectrum sharing of 802.11 wireless local area network (WLAN) and radars operating in co-/adjacent channel scenarios (notably 5 GHz) is a problem of considerable importance that requires new innovations. The spectrum sharing explored in this chapter is based on unilateral action by Wi-Fi networks to prevent
This work was supported in part by AFRL CERFER Under Contract FA8650-14-D-1722 M. Mehrnoush () S. Roy University of Washington, Seattle, WA, USA e-mail: [email protected]; [email protected]; [email protected] © Springer Nature Singapore Pte Ltd. 2019 W. Zhang (ed.), Handbook of Cognitive Radio, https://doi.org/10.1007/978-981-10-1394-2_44
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unacceptable interference to incumbent radar and also mitigating the interference from radar to Wi-Fi. Specifically, the ability of a single Wi-Fi ne
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