A microcellular ray-tracing propagation model and evaluation of its narrow-band and wide-band predictions

Abstract

Abstract-Due to the site specific nature of microcellular operational environments, propagation models are required to take into account the exact position, orientation and electrical properties of individual buildings, and hence, ray tracing techniques have emerged as the dominant methods to predict propagation in such environments. A novel hybrid three-dimensional (3-D) ray tracing algorithm which can evaluate scenarios incorporating many thousands of objects by utilising the concept of "illumination zones," is presented in this paper.In order to evaluate the accuracy of the presented model, comparisons of narrow-band and wide-band predictions with measurements are performed for a variety of scenarios. First, power comparisons show that very accurate predictions can be achieved (rms errors less than 3.7 dB). Then, wide-band analysis shows that since the rms delay spread for systems with finite bandwidth is a function of the multipath phase, only average measured and predicted rms delay spread values can be compared and as a result, limited averaging can produce large rms errors. With sufficient averaging the achieved wide-band accuracy in terms of the predicted rms delay spread, is adequate for most planning purposes.Index Terms-Narrow-band and wide-band radio channel measurements and predictions, propagation modeling, ray tracing.

Communicating pictures: The test of future wireless networks

“…Tools developed at the University of Bristol [1] offer high levels of spatial and temporal coverage and have been rigorously validated using narrow and wide-band measurements. They support the accurate modelling of antennas (including spatial pattern and polarisation) and hence allow advanced wireless video solutions (eg MIMO) to be fully evaluated before moving to prototype.…”

Quality Measurements on the Radio Interface of the Mobile Communication in the Proximity of the Power System

“…The first model is based on observations and measurements alone and this model is mainly used to predict the path loss, but models that predict rain-fade and multipath have also been proposed by (Hata, 1980) and evaluated by (Singh et al, 2006). The second make use of the laws governing electromagnetic wave propagation to determine the received signal power at a particular location (Capsoni et al, 2009) and the third; often require a complete 3-D map of the propagation environment (Athanasiadou et al, 2000). These models are also very useful for performing interference and coupling studies as the deployment proceeds particularly for conducting feasibility studies during initial deployment requiring the least information about the environment (Abhayawardhana et al, 2005;Tan et al, 2003).…”

“…The influence of these propagation environments to the GSM cellular mobile network are widely used by many authors in the real-time requirements of mobile telecommunication systems (Hata, 1980;Capsoni et al, 2009;Athanasiadou et al, 2000;Anderson, 2003;Abhayawardhana et al, 2005;Tan et al, 2003;Low, 1992;Jawhar and Wu, 2005;Chen et al, 2005;Srivastava and Mishra, 1997;Ronchini and Gaiani, 1998;Tunnicliffe et al, 1997;Sathyendranl and Smith, 1998;Silventoinen et al, 1997;Islam et al, 2006;Ismail et al, 2010;www.anite.com/nemo). Different propagation models are used extensively in GSM network planning and can be broadly categorised into three types models respectively, empirical, deterministic and stochastic (Hata, 1980;Capsoni et al, 2009;Athanasiadou et al, 2000;Anderson, 2003). The first model is based on observations and measurements alone and this model is mainly used to predict the path loss, but models that predict rain-fade and multipath have also been proposed by (Hata, 1980) and evaluated by (Singh et al, 2006).…”

Efficient Radio Propagation Prediction Algorithm Including Rough Surface Scattering With Improved Time Complexity

“…Although an indoor wireless communication network can be designed either by estimation through simulation or through extensive field measurements, it is preferable to use estimation through simulation. For estimation through simulation, the ray tracing based methods are very popular and widely used [1][2][3][4][5][6].…”