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In this paper, an indoor channel measurement campaign in conference room and corridor is introduced, using multi-dimension wideband channel sounder to obtain spatial channel characteristics at 25.5, 28, 37.5 and 39.5 GHz in various elevation angles. Due to proper separation of frequency, two multi-frequency path loss models considering cross polarization discrimination (XPD) factor are proposed to...
The channel measurement and modeling of fading characteristics of 25.5 and 39.5 GHz bands in corridor environment are investigated. An automatic measurement system owning a sufficient dynamic range is designed to overcome the prominent attenuation in the millimeter-wave band. After conducting extensive measurements, large-scale and small-scale fading characteristics are obtained and compared. Good-of-fit...
In this paper, the dynamic channel characteristics at 23.5 GHz in an indoor scenario are investigated according to measurement and deterministic simulation. In order to obtain accurate channel realizations, the ray tracing (RT) software is calibrated on both the power delay profile and the path levels. For the measurement data, the propagation paths are identified using the non-parametric peak detection...
This paper presents an effective scheduling scheme called semi-persistent scheduling for VoIP service in LTE system. The main challenges of effectively supporting VoIP service in LTE system are 1) the tight delay requirement combined with the frequent arrival of small packets of VoIP traffic and 2) the scarcity of radio resources along with control channel restriction in LTE system. Simulation results...
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