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URN etd-0817106-164151 Statistics This thesis had been viewed 2728 times. Download 1425 times. Author yeong-fu ho Author's Email Address No Public. Department Communication Engineering Year 2005 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 77 Title PAPR Reduction For OFDM By Using Selective Discrete Sinusodial Transform Keyword Reduction PAPR by using sinusodial Reduction PAPR PAPR PAPR Reduction PAPR Reduction PAPR by using sinusodial Abstract OFDM (Orthogonal Frequency Division Multiplexing) is a promising technique for achieving high data rate and combating multipath fading in wideband data communications. OFDM can be thought as a hybrid of multi-carrier modulation (MCM) and frequency shift keying (FSK) modulation, The transmitted data by dividing into several parallel bit stream and modulating each of these data streams onto individual carriers or subcarriers.
OFDM was exploited for wideband data communications over wireless LAN(IEEE802.11a/g), WIMAX(IEEE802.16a) , high-bit-rate digital subscriber lines (HDSL; 1.6 Mbps),.asymmetric digital subscriber lines (ADSL; up to 6 Mbps), very-high-speed digital subscriber lines (VDSL; 100 Mbps), digital audio broadcasting (DAB), and high-definition television terrestrial broadcasting.
OFDM has many well-known advantages, such as the robustness to the intersymbol interference (ISI) and multi-path fading, high bandwidth efficiency, and so on. But it has suffer from the high Peak-to-average power ratio (PAPR). The PAPR reduces the power efficiency of the RF high power amplifier in the transmitter and cause distortion in the system.
In this thesis, we propose a new PAPR reduction method, which use a Select Discrete Sinusoidal Transform in the frequency domain of OFDM to reduce PAPR, The simulation result shows that the proposed method can reduce PAPR value of a 64 to 8192 sub-carrier OFDM system utilizing BPSK, QPSK, 16 QAM, 64 QAM modulation to 4db above than the peak PAPR, The proposed technique is very simple, but require 2 bits side information to be transmitted from the transmitter to the receiver.
Advisor Committee Chau-Yun Hsu - advisor
none - co-chair
none - co-chair
Files Date of Defense 2006-07-06 Date of Submission 2006-08-17