Open AccessMeasurement and empirical modelling of root mean square delay spread in indoor femtocells scenarios
Author(s) -
Yu Yu,
Liu Yang,
Lu WenJun,
Zhu HongBo
Publication year - 2017
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2017.0410
Subject(s) - delay spread , root mean square , path loss , standard deviation , mean squared error , cumulative distribution function , log normal distribution , femtocell , computer science , square root , statistics , mathematics , channel (broadcasting) , probability density function , telecommunications , fading , physics , wireless , geometry , quantum mechanics , base station
A root mean square (RMS) delay spread model in indoor femtocell scenarios is proposed. The proposed model is based on extensive channel sounding of indoor stair, corridor and office environments. In this model, the RMS delay spread is described as a linear function of the path loss, and a normal stochastic variable is introduced and utilised to characterise the deviation of the measured RMS delay spread from the linear function. The proposed model can be used to simulate the RMS delay spread directly from extracted model parameters and the separation of the transmitting and receiving antennas. The closed‐form formulas for fast calculating the mean value and variance of the RMS delay spread using some deterministic values, including the femtocell coverage distance and the parameters of the proposed model, are derived. The validity of the proposed model is verified by comparing the cumulative distribution functions and the statistical values of the measured and simulated RMS delay spread.