| 1. |
- Kilic, Yakup, et al.
(författare)
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An Experimental Study of UWB Device-Free Person Detection and Ranging
- 2013
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Ingår i: 2013 IEEE International Conference on Ultra-Wideband, ICUWB 2013; Sydney, NSW; Australia; 15 September 2013 through 18 September 2013. - 9781479909698 ; , s. 43-48
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Konferensbidrag (refereegranskat)abstract
- Passive person detection and localization is an emerging area in UWB localization systems, whereby people are not required to carry any UWB ranging device. Based on experimental data, we propose a novel method to detect static persons in the absence of template waveforms, and to compute distances to these persons. Our method makes very little assumptions on the environment and can achieve ranging performances on the order of 50 cm, using off-the-shelf UWB devices.
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| 2. |
- Kilic, Yakup, et al.
(författare)
-
Device-Free Person Detection and Ranging in UWB Networks
- 2014
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Ingår i: IEEE Journal on Selected Topics in Signal Processing. - : Institute of Electrical and Electronics Engineers (IEEE). - 1941-0484 .- 1932-4553. ; 8:1, s. 43-54
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Tidskriftsartikel (refereegranskat)abstract
- We present a novel device-free stationary person detection and ranging method, that is applicable to ultra-wide bandwidth (UWB) networks. The method utilizes a fixed UWB infrastructure and does not require a training database of template waveforms. Instead, the method capitalizes on the fact that a human presence induces small low-frequency variations that stand out against the background signal, which is mainly affected by wideband noise. We analyze the detection probability, and validate our findings with numerical simulations and experiments with off-the-shelf UWB transceivers in an indoor environment.
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| 3. |
- Mahfouz, MHD Zaher, et al.
(författare)
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Impact of Ultra-Narrowband Interference on Wi-Fi Links: An Experimental Study
- 2021
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Ingår i: IEEE Transactions on Wireless Communications. - 1558-2248 .- 1536-1276. ; 20:5, s. 3016-3030
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Tidskriftsartikel (refereegranskat)abstract
- 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.
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