Performance evaluation of turbo transmit diversity for mobile communication systems over the frequency nonselective fading channel | |
| Author | Elyas Palantei |
| Call Number | AIT RSPR no. TC-01-08 |
| Subject(s) | Wireless communication systems Mobile communication systems |
| Note | A research study submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Advanced Technologies |
| Publisher | Asian Institute of Technology |
| Series Statement | Research studies project report ; no. TC-01-08 |
| Abstract | In practical implementations, the fundamental characteristics of the channel in wireless communication systems are often affected by fading. There are a number of techniques for fading mitigation to achieve more reliable transmission of data. Right now, there are some efforts to combine the space-time processing and turbo coding methods to perform transmit and receive diversity. This research study is intended to improve the performance of wireless communication by exploiting the powerful combination of multiple turbo code and space time processing. This combination technique, so-called as turbo transmit diversity (TTD), is evaluated over the flat fading channel with a limited number of transmit and receive antennas. On the simulation, an ideal channel estimation is used and there are no multipaths considered. The results demonstrated the BER performance of our TTD system, are found by comparing the BER curve at the fifth iteration affected by an increasing of the number transmit antennas or the number of receive antennas, separately. It could be shown that the performance of our system will increase when the number of transmit antennas is varied from 1 up to 3 transmit antennas for the case of one receive antenna used in the scenario. In case of TTD with code rate Yi, there is BER-performance gain about 0.25 dB if we increase the number of Tx-antenna from 1 to 2 at BER 10- 3 and only 1.0 dB gain achievement for increasing Tx-antenna from l to 3 at BER 10-5 • Therefore we could state here that the diversity character of our system is much better achieved when the number transmit antennas increased. Meanwhile, on the other scenario, the increasing of number receive antennas at the receiver will also affect the BER performance gain increased by 0.125 dB for a fixed number of transmit antennas as demonstrated in 2 Tx-antenna case in the region of BER 10· 4 . The diversity performance will be better when the number of Tx-antennas increased for a fixed Rx-antenna, and vice versa. |
| Year | 2001 |
| Corresponding Series Added Entry | Asian Institute of Technology. Research studies project report ; no. TC-01-08 |
| Type | Research Study Project Report (RSPR) |
| School | School of Advanced Technologies (SAT) |
| 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.;Makelainen, Kimmo; |
| Scholarship Donor(s) | DAAD - Germany; |
| Degree | Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 2001 |