TY - GEN

T1 - Frequency Effect on UWB Channel Modelling in a Ray-Tracing Based InteraComm Simulator

AU - Asif, Hafiz

AU - Chadwick, Sam

AU - Honary, Bahram

AU - Ahmed, Hassan

PY - 2010/6

Y1 - 2010/6

N2 - The effect of multipath environment in any wireless channel is a difficult task to handle. Fortunately, in case of Ultra-Wide Band (UWB), this is inherently solved to some extent due to its very fine time resolution or extremely wide bandwidth. Inthis paper, a deterministic channel model was developed based on ray-tracing technique using the art of computer game technology.Both reflection and refraction phenomenon were considered. This work is mainly aimed at incorporating frequency dependent behaviour in the simulator and studying the performance of a UWB channel model over a frequency band of 500MHz and over. If a ray hits a tiny object or corner of the object which size is proportional to the wavelength under consideration, the corresponding frequency was assigned to all the rays in that run of the simulation. The process is repeated for different values of the wavelength by changing the size of the object(s). Ourresults show that there is little scattering, and hence almost frequency independence behaviour of the channel beyond 3GHz.Moreover, more rays are scattered at relatively lower frequency range (500MHz − 3GHz) but this number (scattered rays) is decreased monotonically with increase in frequency. Moreover, the change in frequency does not affect the channel behaviour a lot. However, it does change the pattern of received rays which will be shown in simulation section. Lastly, the RMS delay and other channel parameters almost remain unchanged.

AB - The effect of multipath environment in any wireless channel is a difficult task to handle. Fortunately, in case of Ultra-Wide Band (UWB), this is inherently solved to some extent due to its very fine time resolution or extremely wide bandwidth. Inthis paper, a deterministic channel model was developed based on ray-tracing technique using the art of computer game technology.Both reflection and refraction phenomenon were considered. This work is mainly aimed at incorporating frequency dependent behaviour in the simulator and studying the performance of a UWB channel model over a frequency band of 500MHz and over. If a ray hits a tiny object or corner of the object which size is proportional to the wavelength under consideration, the corresponding frequency was assigned to all the rays in that run of the simulation. The process is repeated for different values of the wavelength by changing the size of the object(s). Ourresults show that there is little scattering, and hence almost frequency independence behaviour of the channel beyond 3GHz.Moreover, more rays are scattered at relatively lower frequency range (500MHz − 3GHz) but this number (scattered rays) is decreased monotonically with increase in frequency. Moreover, the change in frequency does not affect the channel behaviour a lot. However, it does change the pattern of received rays which will be shown in simulation section. Lastly, the RMS delay and other channel parameters almost remain unchanged.

M3 - Conference contribution/Paper

SN - 978-1-902560-24-3

BT - 11th Annual PostGraduate Symposium on the Convergence of Telecommunications, Networking and Broadcasting (PGNET 2010)

PB - Liverpool John Moores University

CY - Liverpool, UK

T2 - 11th Annual PostGraduate Symposium on the Convergence of Telecommunications, Networking and Broadcasting (PGNET 2010)

Y2 - 21 June 2010 through 22 June 2010

ER -