EXPERIMENTAL CHARACTERISATION OF MILLIMETRE-WAVE CHANNEL AT 28GHZ IN AN OUTDOOR ENVIRONMENT IN A NON-LINE OF SIGHT SCENARIO

The present study provides an experimental characterisation of a millimetre-wave (mm-W) channel at a frequency of 28GHz for an outdoor environment with a non-line of sight (NLOS) scenario. The channel sounder system (CSS) correlation was employed to record the channel response, and the power delay profile (PDP) and path loss values were measured [1]. For vertically polarised antenna configurations, RMS delay spread across the band was employed along with a highly directional horn receiver antenna as well as an omnidirectional transmitter antenna. We considered a typical urban threshold of 10dB and an urban threshold of 20dB for areas operating at 28GHz frequency. The measurements for 10dB and 20dB urban threshold environments considered the values of path loss exponent (n) use models: cost-231 (CI) and free space (FI) [2]. The path loss was compared and analysed with regard to the 10dB and 20dB measured urban threshold data. As per the results pertaining to this research, for 10 dB urban threshold areas, the path loss estimation had an observed impact as distance increased. At the start of the measurements pertaining to the 10dB urban threshold environment, the losses were found to be around 112dB post 110m distance from the measurement survey. The measurement analysis anticipates normal signal quality near the collector set for the specified removal from the transmitter and also the variation in the signal quality with regard to the specific environment. The results based on this work are regarded as beneficial for planning and installation of any base station in similar environments or locations. These outcomes provide rules for arranging cells in remote communication frameworks since path loss is important for calculations within the plan pertaining to any radio communications framework system [3].