Title :
A new SLM OFDM scheme with low complexity for PAPR reduction in CR system
Author :
Xin, Liu ; Qihui, Wu ; Yang, Yang
Author_Institution :
PLA Univ. of Sicence & Technol., Nanjing, China
fDate :
Aug. 28 2010-Sept. 3 2010
Abstract :
The ever growing demand for wireless services has placed enormous burden on valuable resources such as spectral bandwidth. Cognitive Radio (CR) with dynamic access is becoming the main trend of the next generation wireless communication system as it can greatly increase the efficiency of spectrum utilization. OFDM, which can allocate spectrum resource conveniently, is the main modulation scheme of CR. Recently, OFDMA has been adopted by IEEE802.22 Wireless Regional Area Network (WRAN) as the transmission technique of physics layer and multi-address access technique. However, high peak-to-average power ratio (PAPR) of signal is a major problem of OFDM system. High peak value would result in distortion of signals for the non-linearity of power amplifier, which would create interference to licensed users.
Keywords :
OFDM modulation; cognitive radio; frequency division multiple access; interference (signal); power amplifiers; radio spectrum management; spectral analysis; wireless LAN; CR system; IEEE802.22 wireless regional area network; OFDMA; PAPR reduction; SLM OFDM scheme; WRAN; cognitive radio; dynamic access; high peak-to-average power ratio; interference; low complexity; main modulation scheme; multiaddress access technique; next generation wireless communication system; power amplifier; spectral bandwidth; spectrum resource allocation; spectrum utilization; transmission technique; wireless services; Complexity theory; Partial transmit sequences; Peak to average power ratio; Simulation; Time domain analysis; Transforms;
Conference_Titel :
Wireless Information Technology and Systems (ICWITS), 2010 IEEE International Conference on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-7091-4
DOI :
10.1109/ICWITS.2010.5611962
