dc.contributor.advisor |
Wavegedara KCB |
|
dc.contributor.author |
Tennakoon TMP |
|
dc.date.accessioned |
2021 |
|
dc.date.available |
2021 |
|
dc.date.issued |
2021 |
|
dc.identifier.citation |
Tennakoon, T.M.P. (2021). 3-Dimensional spatial channel model for multi-storeyed indoor environments [Master's theses, University of Moratuwa]. Institutional Repository University of Moratuwa. http://dl.lib.uom.lk/handle/123/21399 |
|
dc.identifier.uri |
http://dl.lib.uom.lk/handle/123/21399 |
|
dc.description.abstract |
A three-dimensional (3-D) geometry-based stochastic model (GBSM) is presented
for various types of multi-story indoor environments. The proposed model assumed
that the scatterers are distributed within a spheroid, where the transmitter
and the receiver are located at the focal points of the spheroid. The proposed
model provides the probability density functions (PDFs) of the angle of arrival
(AoA), the time of arrival (ToA) and the spatial correlation coe cients correspondence
with several channel parameters of the channel.
By considering non-uniform scatterer distributions, the spheroid GBSM is
extended for multistory indoor environments. Closed-form expressions are derived
for the joint and marginal PDFs of the AoA in both the elevation and azimuth
planes and the ToA. The analytically-derived PDFs of the AoA and ToA obtained
for Gaussian and Rayleigh scatterer distributions are compared against those
obtained from the ray-tracing simulation of typical indoor environments. The
standard deviation values of Gaussian and Rayleigh scatterer distributions are
chosen to provide the best possible approximation to the PDFs of the AoA and the
ToA obtained from simulation. Our results clearly indicate that the analyticallyderived
PDFs of the AOA and the TOA for Gaussian and Rayleigh scatterer
distributions are in much closer agreement with those obtained from ray-tracing
simulation than for uniform scatterer distribution. However, analytically-derived
PDFs of the AOA and the TOA for Gaussian scatterer distribution show closest
agreement with those PDFs obtained from the simulations.
A generalized 3D channel model with an arbitrator scatterer distribution point
is proposed based on the spheroid GBMS. The proposed channel model is assumed
that the scatterers to be distributed according to the Gaussian distribution about
an arbitrary point within the spheroid. Closed-form expressions are derived for
the joint PDFs of the AoA, marginal PDFs in both the elevation and azimuth
planes, as well as for the marginal PDF of the ToA. Numerical results are utilized
for the veri cation of the derived-closed form mathematical expressions. More-over, the obtained marginal PDFs of AoA and TOA are compared against PDFs
obtained from the simulation of an indoor environment using ray-tracing tool.
By choosing a proper scatterer distribution center point based on the actual indoor
propagation environment and a suitable value for the standard deviation of
the scatterer region, the proposed 3-D model of the channel can be exploit the
performance of the wireless communication technologies and systems in indoor
environments.
The spheroid GBSM is extended to a 3D geometry-based spatial correlation
model for multiple-input multiple-output (MIMO) communication environments.
Approximated closed-form expressions are obtained for the normalized spatial
correlation coe cients of frequency non-selective Rician fading channels. As a
special case, the normalized spatial coe cients are derived for Gaussian scatterer
distribution. Closed-form expressions developed are veri ed by the simulation results
obtained using the WINNER Phase II channel model (WIM2). Furthermore,
the capacity performance of MIMO channels is investigated using the proposed
geometry-based correlation model. Our results have clearly demonstrated that
the proposed 3D spatial correlation model can be used to investigate the performance
of the frequency non-selective Rician or Rayleigh fading MIMO channels
with di erent antenna con gurations accurately. |
en_US |
dc.language.iso |
en |
en_US |
dc.subject |
3D STOCHASTIC CHANNEL MODEL |
en_US |
dc.subject |
3-DIMENSIONAL SPATIAL CHANNEL MODEL |
en_US |
dc.subject |
MULTI-STOREYED INDOOR ENVIRONMENTS |
en_US |
dc.subject |
ELECTRONIC & TELECOMMUNICATION ENGINEERING - Dissertation |
en_US |
dc.title |
3-Dimensional spatial channel model for multi-storeyed indoor environments |
en_US |
dc.type |
Thesis-Abstract |
en_US |
dc.identifier.faculty |
Engineering |
en_US |
dc.identifier.degree |
Master of Philosophy |
en_US |
dc.identifier.department |
Department of Electronic and Telecommunication Engineering |
en_US |
dc.date.accept |
2021 |
|
dc.identifier.accno |
TH5052 |
en_US |