Performance investigation of concatenated reed solomon coding and turbo trellis coded modulation for MC-CDMA wireless networks | |
| Author | Win Myat Tun |
| Call Number | AIT RSPR no. TC-03-16 |
| Subject(s) | Code division multiple access Wireless communication systems Network performance (Telecommunication) |
| 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 |
| Series Statement | Research studies project report ; no. TC-03-16 |
| Abstract | The demands for multimedia services increase rapidly. High data rate wireless communication systems are, therefore, indispensable to fulfill these demands. Multicarrier Code Division Multiple Access (MC-CDMA) system is considered as a suitable candidate for future generation broadband wireless networks due to its favorable properties to provide high data rate and high capacity and to overcome many channel impairments. In addition, the wireless mobile systems are in need of powerful channel codes to combat burst errors in severely distorted mobile radio channel which exhibits random and time variant nature. In this research study, bit error rate (BER) performance of the MC-CDMA downlink system with the concatenated Reed Solomon (RS) coding and Turbo Trellis Coded Modulation (TTCM) schemes, (RS-TTCM), is investigated and compared with individual RS and TTCM coding schemes. The comparisons are also made with serial concatenation of convolutional code and TCM, (SC-TCM). The simulations are carried out in A WGN and multipath fading channels. Performance comparisons are made in different mobile speed as well as different number of active users for both coded and uncoded cases. Based on the simulation results, the performance of TTCM is better than RS at low SNR value. However RS outperforms TTCM at high SNR since TTCM has an error floor occur around BER of 1 o·6 at high SNR. Such an error floor is not occurred with the concatenated RS and TTCM coding scheme that outperforms RS and TTCM in A WGN and multipath fading channels. The performance of RS-TTCM is worse than that of SC-TCM. The decoder complexity of RS-TTCM is also higher than that of SC-TCM. However, with the same bandwidth, the data rate of SC-TCM is nearly half that of RSTTCM and to get the same data rate, the bandwidth requirement for SC-TCM is twice as compared to RS-TTCM. Due to limited bandwidth and requirement of high data rate of multimedia applications, the investigated RS-TTCM coding scheme with the requirement of high decoder complexity, will be applicable for such environment and could be potential candidate for future high-speed mobile wireless system such as MC-CDMA system. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Research studies project report ; no. TC-03-16 |
| 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) | Ahmed, Kazi M.; |
| Examination Committee(s) | Teerapat Sanguankotchakom ;Erke, Tapio J.; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship.; |
| Degree | Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 2003 |