TVWS extension of the 3GPP/ITU channel model

Abstract

Recently many cellular and WLAN standards are considering operation in the TV bands due to enhanced coverage and access to additional bandwidth. To accurately assess the performance of wireless communication systems operating in the TeleVision White Space (TVWS) spectrum, a new channel model is required that accounts for the unique propagation characteristics in the UHF band. This paper proposes an extension to the existing 3GPP/ITU channel model for operation at frequencies from 400 MHz (bottom of the TVWS band) up to 5 GHz (top of the WLAN band). The channel model is suitable for urban environments and the raw propagation data was generated using a state-of-the-art 3D ray-tracing tool. Results are presented as cumulative distribution functions of total received power, RMS delay spread, K-factor and RMS angular spread (azimuth and elevation). The probability of line-of-sight as function of distance and best-fit parameters for large and small scale fading are also presented.

TV White Spaces for Digital Inclusion in Brazil

“…• Programme Making and Special Events (PMSE) equipment such as microphones may not be considered, since PMSE are likely to be rare in hard-to-reach locations [10]; • The regulations must be based on the models of FCC and Ofcom, as these approaches provide the most straightforward TVWS regulatory system [14], [15]; • It must be considered suitable propagation models during the development of the GLDB to enhance the system's performance. Works in [21], [22] present appropriate models to work with UHF band. Since in Brazil there is no regulation about TVWS, this resource could be considered here as a license-exempt service for secondary use.…”

Analysis of radio access network performance for M2M communications in LTE-A at 800 MHz

“…The PL model used in this study is based on a 3D ray tracer tool for the macro-cell environment of (4 km x 4.4 km) area in the center of Bristol [16]. Assuming all the devices are non-line-of-sight (NLOS), the PL model at 800 MHz can be expressed as:…”