Abstract
Orthogonal frequency division multiplex (OFDM) is a very effective technique for the wireless high-speed data transmission and robust for selective fading channel and inter-symbol interference (ISI). Recently, OFDM has been used widely in many kinds of communication transmission systems and method such as digital audio broadcasting (DAB), wireless local-area network (WLAN), IEEE 802.11, WiMAX (IEEE 802. 16) and Asymmetric Digital Subscriber Line (ADSL). However, it has some drawbacks to improve. One serious disadvantage is high peak-to-average power ratio (PAPR). If the transmitted signal has high PAPR, the D/A converters and amplifiers need to have large dynamic range. Otherwise output signal will have serious distortion. In recent years, many schemes are efficient to reduce PAPR. Although a lot of schemes can reduce PAPR efficiently, we only focus on PTS algorithm and have a modified one in this thesis. In the thesis, we propose a non-uniform phase set in PTS and show it has better performance than original phase set in PTS.