Characterisation of the Indoor Mobile channel using a Ray Tracing Model (original) (raw)
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The use of Ray Tracing in Characterising the Indoor Mobile Radio Channel
2007
This paper presents a technique of modelling the indoor radio channel that provides an insight into the propagation mechanisms involved. The model by its nature provides a detailed account of the channel, with access to all of the system parameters. To demonstrate the validity of this model, results are presented which show the close match between the real environment and the simulated environment. Although gross approximations are made about the environment, the model still gives good results, highlighting the important parameters that need to be considered in channel models.
Characterisation of the indoor mobile radio channel using a ray tracing technique
1992 IEEE International Conference on Selected Topics in Wireless Communications, 1992
Investigation of the mechanisms of radio propagation in the indoor environment can only be performed using a detailed simulation of the environment. To this end, a model of the environment has been developed using ray tracing techniques. The model inherently incorporates the near-eld e ects of multipath environment where the transmitter and receiver are in close proximity. Statistical analysis of the resulting model has shown that an adequate match between the real environment and the simulation can be achieved. A Nakagami model is found to describe the fast fading component of the channel well.
Propagation modelling for indoor wireless communication
Electronics & Communication Engineering Journal, 1995
It is important to characterise the indoor radio propagation channel to ensure satisfactory performance of a wireless communication system. Site measurements can be costly; propagation models have been developed as a suitable low-cost alternative. The existing models can be classified into two major classes: statistical models and site-specific propagation models. Statistical models rely on measurement data; site-specific propagation models are based on electromagnetic-wave propagation theory. The ray-tracing technique is very useful in site-specific propagation modelling. This paper gives an overview of indoor propagation modelling and concentrates on a discussion of the raytracing modelling technique because of its practical appeal and its applicability t o any environment.
2001
Abstract A statistical space-time model for indoor wireless propagation based on empirical measurements is compared with results from the deterministic ray-tracing simulation tool WiSE for the same environment. Excellent agreement is found in terms of the distributions of arrival times and angular spread for both modeling approaches. The WiSE package is also use to synthesize MIMO channel matrices and determine the theoretical capacity, available in the tested environments.
Influence of an Accurate Environment Description for the Indoor Propagation Channel Modelling
The European Conference on Wireless Technology, 2005., 2005
The current wireless systems evolve towards multimedia applications demanding more and more high bit rate. Consequently, we observe an important rise in frequency. Then, it becomes necessary to study the influence of particular details of environment such as rough surfaces or small and complex scattering structures. Nowadays, ray tracing techniques, based on the Geometrical Optic (OG) and the Uniform Theory of Diffraction (UTD), are the dominant techniques to predict the channel behaviour over a large bandwidth. Our study aims to improve the ray tracing power for the indoor propagation channel modelling by taking into account particular details of the environment.
A graphical indoor radio channel simulator using 2D ray tracing
[1992 Proceedings] The Third IEEE International Symposium on Personal, Indoor and Mobile Radio Communications
T h i s paper presents a graphical user interface program that uses a ray tracing algorithm to predict the radio propagation in the indoor radio channel from the layout of the floor plan. The program allows the user to interactively specify the location of the walls in the floor plan, the type of material in the construction, and the location of the radio transmitter and receiver. The ray tracing algorithm determines the magnitude, phase, time of arrival, and direction of every signal path between the specified radio transmitter and receiver when an RF pulse is transmitted. The accuracy of the model for a shielded cage is examined by comparing the results with those obtained from empirical measurements. Comparisons are also made between the simulation and the results of measurements in a complex laboratory environment at Worcester Polytechnic Institute.
IEEE Transactions on Antennas and Propagation, 2001
The results of a wide-band indoor measurement campaign are compared with the corresponding simulation results provided by a 3-D ray-tracing field prediction model. A novel comparison criterion based on the "scale level" concept is presented and used in the present work. On the basis of the cited criterion, the validity domain of the ray-tracing tool, the degree of accuracy of the prediction as a function of the scale level, and future necessary improvement of the model have been identified and discussed. The comparisons refer to a variety of propagation parameters such as path loss, delay spread, coherence bandwidth, etc. The influence of environment description (with or without furniture) is also analyzed. The paper shows that the 3-D ray tracing model can be a useful tool for the analysis of indoor propagation and for the design and the implementation of indoor, wide-band applications. Index Terms-Indoor radio communications, multipath channels, ray tracing, wide-band measurements.
STUDY OF VARIOUS INDOOR PROPAGATION MODELS
Indoor Propagation modeling is demanded for the maintenance of indoors-wireless services. Propagation models provide estimates of signal strength and time dispersion in many indoor environments. These data are valuable in the design and installation of indoor radio systems. We propose improving existing channel models by building partitioning technique. Based on the measurement results the easy-to-use empirical propagation predication models were derived for both of the buildings with satisfactory accuracy. The result used to determine the path loss exponent and standard deviation. It similarly shows that the RSS values Vs distance help in determine the variation in multi-wall model and single wall.
Ray tracing prediction of indoor radio propagation
5th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Wireless Networks - Catching the Mobile Future., 1994
Indoor wireless systems will be used in a large variety of office, factory and residential environments. Thus, adequate guidelines for radio port placement are needed to ensure satisfactory performance at the lowest cost. These guidelines must be derived from a large body of site-specific propagation data. However, collecting a statistically significant database through measurements is a daunting task. Alternatively, this database can be generated by using propagation models, validated by measurements. Several models exist for the statistical characterization of microwave propagation within buildings. However, statistical models do not provide site-specific information. We propose a hybrid model in which ray tracing is used to predict, a t any given location, the local mean of the received power and the delay profile. Variations about the mean values can then be captured via a statistical description matched to the local environment. We describe an efficient 3-D ray tracing algorithm which accounts for all (transmitted as well as reflected) rays reaching the receiver location after an arbitrary number of reflections. We include the effects of the angle of incidence, the material dielectric constant and the antenna patterns. The predicted values for the local means of the received power are then compared against measurements to establish the accuracy of this approach.
Advances in Science, Technology and Engineering Systems Journal, 2018
The main target of this article is to study the provision of indoor service (coverage) using outdoor base station at higher frequencies i.e. 10 GHz, 30 GHz and 60 GHz. In an outdoor to indoor propagation, an angular wall loss model is used in the General Building Penetration (GBP) model for estimating the additional loss at the intercept point of the building exterior wall. A novel angular wall loss model based on a separate incidence angle in azimuth and elevation plane is proposed in this paper. In the second part of this study, an Extended Building Penetration (EBP) model is proposed, and the performance of EBP model is compared with the GBP model. In EBP model, the additional fifth path known as the "Direct path" is proposed to be included in the GBP model. Based on the evaluation results, the impact of the direct path is found significant for the indoor users having the same or closed by height as that of the height of the transmitter. For the indoor users located far away from the exterior wall of building, a modified and enhanced approach of ray tracing type is proposed in this article. In the light of acquired simulation results, the impact of a modified ray tracing approach is emphasized.