Title :
Improved DCM for PAPR reduction in MB-OFDM systems
Author :
Kim, Yunsung ; Park, Sang Kyu ; Choi, Mangue
Author_Institution :
Dept. of Electron. & Comput. Eng., Hanyang Univ., Seoul, South Korea
Abstract :
The DCM scheme is exploited as the modulation scheme for high-data rate transmission in the MB-OFDM system. However, since the DCM modulated symbols are repeatedly fed into the IFFT block, the MB-OFDM system has a high PAPR problem. In this paper, improved DCM is proposed for PAPR reduction in the MB-OFDM systems. The proposed scheme uses a circular shifting operation of the gray coded 16-QAM constellation to reduce the PAPR. The simulation results show that the proposed scheme has a better PAPR performance than DCM.
Keywords :
Gray codes; OFDM modulation; quadrature amplitude modulation; DCM modulated symbols; IFFT block; MB-OFDM systems; PAPR reduction; circular shifting operation; dual carrier modulation; gray coded 16-QAM constellation; high-data rate transmission; modulation scheme; Bandwidth; Peak to average power ratio; Phase shift keying; Physical layer; Simulation; DCM; MB-OFDM; PAPR; UWB; circular shift;
Conference_Titel :
Advanced Communication Technology (ICACT), 2011 13th International Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-8830-8
