scholarly journals EFFICIENT RADIO PROPAGATION PREDICTION ALGORITHM INCLUDING ROUGH SURFACE SCATTERING WITH IMPROVED TIME COMPLEXITY

2013 ◽  
Vol 53 ◽  
pp. 127-145 ◽  
Author(s):  
Abu Sulaiman Mohammad Zahid Kausar ◽  
Ahmed Wasif Reza ◽  
Kamarul Ariffin Noordin ◽  
Mohammad Jakirul Islam ◽  
Harikrishnan Ramiah
Keyword(s):  
Rough Surface ◽  
Time Complexity ◽  
Radio Propagation ◽  
Surface Scattering ◽  
Prediction Algorithm ◽  
Rough Surface Scattering ◽  
Propagation Prediction

scholarly journals A Comprehensive Propagation Prediction Model Comprising Microfacet Based Scattering and Probability Based Coverage Optimization Algorithm

2014 ◽  
Vol 2014 ◽  
pp. 1-17
Author(s):  
A. S. M. Zahid Kausar ◽  
Ahmed Wasif Reza ◽  
Lau Chun Wo ◽  
Harikrishnan Ramiah
Keyword(s):  
Ray Tracing ◽  
Rough Surface ◽  
Optimization Algorithm ◽  
Prediction Models ◽  
Integrated Approach ◽  
Optimization Techniques ◽  
Surface Scattering ◽  
Rough Surface Scattering ◽  
Coverage Optimization ◽  
Propagation Prediction

Although ray tracing based propagation prediction models are popular for indoor radio wave propagation characterization, most of them do not provide an integrated approach for achieving the goal of optimum coverage, which is a key part in designing wireless network. In this paper, an accelerated technique of three-dimensional ray tracing is presented, where rough surface scattering is included for making a more accurate ray tracing technique. Here, the rough surface scattering is represented by microfacets, for which it becomes possible to compute the scattering field in all possible directions. New optimization techniques, like dual quadrant skipping (DQS) and closest object finder (COF), are implemented for fast characterization of wireless communications and making the ray tracing technique more efficient. In conjunction with the ray tracing technique, probability based coverage optimization algorithm is accumulated with the ray tracing technique to make a compact solution for indoor propagation prediction. The proposed technique decreases the ray tracing time by omitting the unnecessary objects for ray tracing using the DQS technique and by decreasing the ray-object intersection time using the COF technique. On the other hand, the coverage optimization algorithm is based on probability theory, which finds out the minimum number of transmitters and their corresponding positions in order to achieve optimal indoor wireless coverage. Both of the space and time complexities of the proposed algorithm surpass the existing algorithms. For the verification of the proposed ray tracing technique and coverage algorithm, detailed simulation results for different scattering factors, different antenna types, and different operating frequencies are presented. Furthermore, the proposed technique is verified by the experimental results.

A Two-scale Model for Composite Rough Surface Scattering

PIERS Online ◽  
2007 ◽  
Vol 3 (5) ◽  
pp. 718-722 ◽  
Author(s):  
Wenzhe Yan ◽  
L. X. Xu ◽  
Yang Du ◽  
F. Sheng ◽  
Z. N. Li ◽  
...  
Keyword(s):  
Rough Surface ◽  
Surface Scattering ◽  
Scale Model ◽  
Rough Surface Scattering

Rough surface scattering

1991 ◽  
Vol 1 (3) ◽  
pp. S41-S56 ◽  
Author(s):  
John A Desanto ◽  
Richard J Wombell
Keyword(s):  
Rough Surface ◽  
Surface Scattering ◽  
Rough Surface Scattering
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