The investigation of MTCM schemes in frequency-selective Rayleigh fading channels with soft-output equalizers | |
| Author | Somchai Singkhorn |
| Call Number | AIT RSPR no. TC-98-15 |
| Subject(s) | Telecommunication Wireless communication systems |
| Note | A research study submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Advanced Technologies |
| Publisher | Asian Institute of Technology |
| Abstract | The primary advantage of TCM/MTCM is its ability to achieve increased power efficiency without the expansion of bandwidth introduced by the coding process. Thus any channel that is both power-limited and bandwidth-limited would be suited to TCMIMTCM. This research presents the error performance of MTCM schemes when applied to frequency-selective Rayleigh fading channel. Three powerful soft-output equalizer algorithms are described, Soft-output Viterbi algorithm (SOY A), suboptimum Soft-output algorithm (SSA), and Max-Log-MAP algorithm. The Viterbi algorithm (VA) is considered for the propose of comparison. The error performance of MTCM schemes with soft-output equalizer is evaluated in terms of Bit Error Rate (BER). Perfect knowledge of the channel coefficients are assumed in the simulation works. The comparisons of performance between different types of equalizers and between different schemes of MTCM are made. The simulation results are given for frequency-selective fading channel. The results show that significant coding gain can be achieved by a suitably designed MTCM in fading channels in comparison with uncoded QPSK. The MTCM schemes in this research do not give a better performance than the conventional TCM scheme. |
| Year | 1998 |
| 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. ;Zhang, Jian-Guo; |
| Scholarship Donor(s) | Telephone Organization of Thailand (TOT) ; |
| Degree | Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 1998 |