| Author | Nguyen Thai Hoang |
| Call Number | AIT RSPR no.TC-03-03 |
| Subject(s) | Data transmission systems
Multiplexing
|
| 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-03-03 |
| Abstract | Orthogonal Frequency Division Multiplexing (OFDM), which is a modulation
technique for multicarrier communication systems, is a promising candidate for 40
systems since it is less susceptible to intersymbol interference (ISI) introduced in the
multipath fading channel. But with appearing of spectral nulls in transmission line, the
performance of OFDM systems can be degraded. Therefore, Precoded and Vector OFDM
systems are proposed to improve the performance of the OFDM systems in spectral null
channel. In addition, beside many of its advantages, OFDM has two major disadvantages:
high Peak to Average Power Ratio (P APR) and frequency offset. Hence, the issue of
PAPR reduction in POFDM and VOFDM systems is investigated in this research study.
P APR of conventional OFDM, POFDM and VOFDM are analyzed with PTS and
ESA algorithms. Simulation results show ESA can gain up to 3.5 dB compared to the
PTS. BER performance is also investigated for all three systems and results suggests that
ESA with 0.8 scaling factor and PTS perform equally in a multipath fading channel with
4 taps. Therefore ESA is a better algorithm to reduce P APR in OFDM, POFDM, and
VOFDM systems. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Research studies project report ; no. TC-03-03 |
| 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) | Fernando, W.A.C.; |
| Examination Committee(s) | Ahmed, Kazi M.;
Teerapat Sanguankotchakorn; |
| Scholarship Donor(s) | Viet Nam Post and Telecommunications (VNPT); |
| Degree | Research report (M.Sc.) - Asian Institute of Technology, 2003 |
