Impact of Ultra-Narrowband Interference on Wi-Fi Links: An Experimental Study
Journal article, 2021

We develop a systematic methodology to experimentally investigate the impact of interference from a non-listen-before-talk ultra-narrowband (UNB) signaling technique on Wi-Fi links. The methodology is based on a worst-case interference scenario, and consists of three investigating steps. This methodology is then applied to a measurement setup to practically study the case of 100 bps UNB signals interfering with an IEEE 802.11n transmission in the 2.4GHz band. Five different Wi-Fi devices are tested. The UNB signal is generated in two modulation schemes, the on-off-keying (OOK) and the Gaussian minimum-shift-keying. Both single and multiple simultaneous UNB interferers are considered. An analysis of the measurement results shows that three of the tested Wi-Fi devices cannot coexist with the considered non-listen-before-talk UNB communication system. The throughput performance analysis of the other tested devices shows that the OOK-modulated UNB signal has the least interfering impact, and the Wi-Fi pilot subcarriers are the most vulnerable to UNB interference. However, if a single UNB interferer avoids these subcarriers and employs the OOK-modulation scheme, then wireless coexistence is possible as long as the signal-to-interference ratio of Wi-Fi to UNB is greater than 30 dB, given that a drop to 75% of the maximum Wi-Fi throughput is acceptable.





2.4 GHz ISM band




wireless coexistence


Wireless communication


Wireless sensor networks

Wireless fidelity


MHD Zaher Mahfouz

University of Twente

Andre B.J. Kokkeler

University of Twente

Arjan Meijerink

University of Twente

Andres Alayon Glazunov

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks

IEEE Transactions on Wireless Communications

1536-1276 (ISSN)

Vol. 20 5 3016-3030 9314243

Subject Categories


Communication Systems

Signal Processing



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Latest update

4/5/2022 5