Cyclic based maximum likelihood detection for unknown channel and interferences : differential unitary space time codes | |
| Author | Kyaw Moe Aung |
| Call Number | AIT Thesis no.TC-05-2 |
| Subject(s) | Astronautics--Communication systems Space time codes MIMO systems |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Space time coding for multiple transmit and multiple receive antenna systems has recently become a very attractive mean to wireless communications area. Many researches have been made for space time coding technique. Most of them are making on assumption of getting complete channel state information (CSI) or estimation of CSI, which is not common in real cases. When the channel is changing continuously, estimation of CSI is very inaccurate or even impossible. For such conditions, differential space time modulation (DSTM) is among simplest and popular choice. The transmitted signal is contaminated not only by thermal noise, but there could be strong unstructured interference which can degrade the performance. In this work, differential unitary space time codes are used for channel coding. In the maximum likelihood (ML) decoding algorithm, estimated added noise covariance is used to overcome the impact of unstructured interference. It is shown that differential unitary space time modulation (DUSTM) has better performance than recently proposed orthogonal space time block coding (OSTBC) algorithm on the same unstructured interference issue, when channel fading rate becomes faster. |
| Year | 2005 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Ahmed, Kazi M. |
| Examination Committee(s) | Erke, Tapio J.;Rajatheva, R.M.A.P. |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship and Cetana Educational Foundation (USA) |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2005 |