Jani Saloranta

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— In the Wireless Body Area Network (WBAN), radio propagations from devices that are close to or inside the human body are complex and distinctive comparing to the other environments since the human body has a complex shape consisting of different tissues. Therefore, the channel models are different from the ones in the other environments. We present a(More)
This paper presents the results of a coexistence study investigating the impact of ultra wideband (UWB) interference on an IEEE802.11b network. Results are based on the experimental test measurements made at the University of Oulu, Finland using simple non-FCC compatible , high power UWB transmitters as interference sources. Preliminary results showed that(More)
In this paper the impact of ultra wideband (UWB) interference on IEEE802.11b WLAN performance is studied through experimental tests. Extremely high power UWB transmitters, that are not FCC compliant, were used in the tests to simulate the impact of very high UWB device concentration. The measurement setup was organized to allow the UWB transmitters to(More)
—New automated solutions are needed, e.g., in mining industry to improve efficiency and productivity of every process. In addition, costs have to be reduced, and health and safety of employees need to be enhanced. This paper studies vehicle-to-vehicle (V2V) communication to be utilized in, e.g., mining vehicles in a tunnel to increase safety and(More)
This paper presents the results of a coexistence study investigating the impact of ultra-wideband (UWB) interference on IEEE 802.11b and Bluetooth networks. The results are based on the experimental test measurements made at the University of Oulu, Finland. Simple high-power UWB transmitters are used to interfere with victim networks. Preliminary results(More)
The paper presents results of a coexistence measurement study between multiple ultra wideband (UWB) transmitters and a Universal Mobile Telecommunications System (UMTS) mobile phone. Two environments were explored: an anechoic chamber with one operating UMTS link and a true operational UMTS network. A large number of FCC compatible UWB transmitters were(More)
—Wireless local area networks (WLANs) gained ever-growing importance in public transportation systems where they are selected to reduce installation costs and introduce new services. However, the introduction of a wireless interface in safety critical applications implies different communication protocol analysis and the introduction of a security layer is(More)
— This paper presents the results of a coexistence study investigating the impact of ultra wideband (UWB) interference on IEEE802.11b and Bluetooth networks. Results are based on the experimental test measurements made at the University of Oulu, Finland using simple high power UWB transmitter prototypes as interference sources. Preliminary results showed(More)
We consider the problem of 3D multiple-input-multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) channel estimation, a key for the future development of 3D beamforming techniques. Our main contribution is a novel algorithm, namely the adaptive-LASSO, that can jointly exploit the sparsity structure of the MIMO-OFDM channel in the spatial(More)