Realistic channel model for capacity analysis of multi-user MIMO system | |
| Author | Senthuran, Sivasothy |
| Call Number | AIT Thesis no.TC-06-08 |
| Subject(s) | MIMO systems Space time codes Spatial systems |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. TC-06-08 |
| Abstract | A modified elliptic model is proposed for the multi-user environment considering the real scatterer distribution. In this model the properties of transmit and receive antennas and the scatterer locations are considered. In addition to amplitude of the electromagnetic field, the directional properties also analyzed. This helps to analyze the polarization effect of the antenna. This generalized model best suits for frequency flat indoor, urban and outdoor to indoor environment with the signal band width less than 3.6 MHz. Even though this channel model is based on the principle of fundamental wave propagation, it is relatively simple. Using the real measurements, the scatterers can be located in the ellipse then the model can be used for any kind of application by reflecting the practical scenario. This model shows that in a rich scattering environment, typically 17% of the mobiles having directional channel but it varies widely with the scatterer distribution. In this thesis, this model has been used to assess the individual MIMO channel matrix of the receivers and the channel capacity enhancement is considered by selecting the users exploiting the multi-user diversity. It is very useful to improve the cell through put in a multi-user environment as well as spatial filter design. In addition to that, new systems can be verified in a site specific environment using this model. The simulation results show that, this channel model is very useful to check a proposed new system in a site specific environment before implementing and to predict the scatterer influence on the system capacity. This model has been used to predict the capacity enhancement of an indoor system, and it shows while using the water filling algorithm at the transmitter side for power allocation gives for 16 transmit receive antenna rich scatterer MIMO system, 5bps/Hz spectral efficiency compared to classical MIMO system and when the receiver side beam forming is applied, it gives further 5bps/Hz spectral efficiency. (Some of the confidential issues related to the thesis work have been done in INT,Evry, France during the exchange dual degree program are not given in detail in this report) |
| Year | 2006 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. TC-06-08 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Rajatheva, R.M.A.P.; |
| Examination Committee(s) | Ahmed, Kazi M.;Poompat Saengudomlert;Marzouki, Abdelwaheb; |
| Scholarship Donor(s) | Royal Thai Government; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2006 |