Abstract
Impact of broadband and out-of-band RFI noise on WiFi performance is quantitatively characterized in comparison to narrowband and in-band noise. Broadband RFI noise starts to decrease throughput at the level of −117 dBm/100kHz, while narrowband noise impacts throughput at level of −106 dBm/100kHz. Broadband noise causes throughput degradation at higher rate than narrowband noise. Regarding out-of-channel RFI noise, WiFi throughput is decreased depending on out-of-channel noise amplitude and frequency spacing between noise and WiFi subcarrier. It is found that WiFi radio gains higher immunity to RFI noise with increasing the frequency spacing. When RFI noise is located at the edge or out of the channel, WiFi radio can sustain noise higher than −80 dBm/100kHz. This study can help understand RFI noise characteristics and quantitative RFI impact on WiFi performance. It can provide good insights for designers to design low RFI-risk platforms.
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