Axxcelera: Dynamic Frequency Selection
The purpose of this document is to explain the purpose and the mechanisms for Dynamic Frequency Selection (DFS) as it relates to the Axxcelera Broadband Wireless family of wireless communication devices.
As the proliferation of wireless devices increases, the need to share radio spectrum with other radio systems becomes a paramount concern. Regulatory bodies have begun to require DFS operation in select frequency bands to make the spectrum available to Wireless Wide Area Network (WWAN) operators while minimizing interference to incumbent radio systems, primarily Radio Detection and Ranging (radar) systems. The mechanism required to detect and avoid frequency channels used by radar systems is called Dynamic Frequency Selection.
The main purpose of DFS is to assure WWAN systems do not interfere with radar systems. Specifically in the United States, the mid-U-NII band (5250-5350 MHz) and the worldwide-U-NII band (5470-5725MHz) bands are required to employ a DFS mechanism to serve this purpose. The requirements can vary widely based on the country of operation and Regulatory Body with jurisdiction over the deployment area. Consult your local Regulatory Authority to obtain the regulations relevant to your area prior to deployment.
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