An Emperical Evaluation of the Received Signal Strength Indicator for fixed outdoor 802.11 links

Konferenz: Mobilkommunikation - 20. ITG-Fachtagung Mobilkommunikation
07.05.2015 - 08.05.2015 in Osnabrück, Deutschland

Tagungsband: Mobilkommunikation

Seiten: 6Sprache: EnglischTyp: PDF

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Rademacher, Michael; Jonas, Karl; Kessel, Markus (Hochschule Bonn-Rhein-Sieg, Sankt Augustin, Germany)

For the evaluation of the received signal strength indication (RSSI) a different methodology compared to previous publications is introduced in this paper by exploiting a spectral scan feature of recent Qualcomm Atheros WiFi NICs. This method is compared to driver reports and to an industrial grade spectrum analyzer. During the conducted outdoor experiments a decreased scattering of the RSSI compared to previous publications is observed. By applying well-known mathematical tests for normality it is possible to show that the RSSI does not follow a normal distribution in a line-of-sight outdoor environment. The evaluated spectral scan features offers additional possibilities to develop interference classifiers which is an important step for frequency allocation in long-distance 802.11 networks.