# Coexistence of Outdoor Wi-Fi and Radar at 3.5 GHz

## TL;DR

This paper proposes a novel Wi-Fi transmission method to coexist with radar at 3.5 GHz, reducing interference while maintaining Wi-Fi operation, addressing regulatory and technical challenges in shared spectrum use.

## Contribution

It introduces a beam angle-based Wi-Fi transmission scheme that suppresses interference to radar without compromising Wi-Fi functionality.

## Key findings

- Effective suppression of Wi-Fi-to-radar interference demonstrated.
- Wi-Fi remains fully operational while minimizing interference.
- Method suitable for shared spectrum regulations at 3.5 GHz.

## Abstract

Coexistence between radar and outdoor Wireless Fidelity (Wi-Fi) needs thorough study since the IEEE 802.11 Working Group (WG) opposed the latest rules in 3550-3700 MHz (the 3.5 GHz band) that require "exclusion zones." This letter proposes a method that suppresses Wi-Fi-to-radar (WtR) interference, in which a Wi-Fi transmitter (TX) is selected to avoid beam angles toward the victim radar. It is distinguished from prior schemes since it ensures that the Wi-Fi remains operable while suppressing the WtR interference.