In this chapter, an aspect of spectrum sharing between a monostatic radar and 802.11 wireless local area networks (WLANs) (Wi-Fi) is explored. Specifically, it focuses on the determination of protection regions around the radar to keep the aggregate interference caused by activeWi-Fi (secondary) sources to within acceptable limits. Of particular interest is the impact of the deployment geometry of the Wi-Fi networks- modeled via suitable random spatial processes-on the statistics of the aggregate interference. The impact of various stochastic geometries on the resulting protection region is explored through both (Monte Carlo) simulation and analytical approaches.

Chapter Contents:

• 13.1 Background
• 13.2 Search radar: noise limited operation
• 13.2.1 Noise-limited radar operation: design equations
• 13.3 Cumulative interference to radar from randomly deployed Wi-Fi APs
• 13.3.1 Average and variance of aggregate interference (I, σI 2 ): Campbell's theorem
• 13.3.1.1 Homogeneous Poisson point process (PPP)
• 13.3.1.2 Nonhomogeneous Poisson process
• 13.4 Simulation results for omni antenna gain pattern
• 13.4.1 Campbell's theorem verification
• 13.4.2 Optimizing the protection region for homogenous PPP
• 13.4.2.1 Numerical brute-force approach for omniprotection region
• 13.4.2.2 Iterative Monte-Carlo approach to determine dopt()
• 13.4.2.3 Gaussian assumption for distribution of Iaggr
• 13.4.2.4 Comparison of the Gaussian assumption with Monte-Carlo simulation
• 13.4.3 Poisson cluster process
• 13.4.3.1 Campbell's theorem verification
• 13.4.4 Inhomogeneous PPP
• 13.5 Simulation results for typical radar gain pattern
• 13.5.1 Homogeneous PPP
• 13.5.2 Inhomogeneous PPP
• 13.6 Looking ahead: future work
• Acknowledgment
• Appendix A
• References

Inspec keywords: stochastic processes; search radar; wireless LAN; radiofrequency interference; radar interference

Other keywords: various stochastic geometries; suitable random spatial processes; analytical approaches; deployment geometry; Monte Carlo simulation; radar protection regions; WLAN; radar/Wi-Fi spectrum sharing; 802.11 wireless local area networks; monostatic radar

Subjects: Radar equipment, systems and applications; Local area networks; Other topics in statistics; Other topics in statistics; Electromagnetic compatibility and interference; Radio links and equipment