Title :
A peak power reduction method for multicarrier transmission
Author_Institution :
Digital Commun. Lab., Samsung Adv. Inst. of Technol., Suwon, South Korea
Abstract :
We developed a method to reduce peak to average power-ratio (PAR) of multicarrier signals. The method enlarged the quadrature amplitude modulation (QAM) constellation size at a number of tones so that several signal points represent the same information. It chose a signal point among equivalent signal points that minimized PAR. This method achieved more than 4 dB PAR reduction when 64 QAM was used to represent 16 QAM constellation in a 64-subcarrier system. Also we could trade the PAR reduction for complexity and power increase by changing the size of the extended constellation
Keywords :
quadrature amplitude modulation; 16 QAM constellation; 64 QAM; 64 QAM constellation; QAM constellation size; iterative algorithm; modified tone injection method; multicarrier signals; multicarrier transmission; peak power reduction method; peak to average power-ratio reduction; quadrature amplitude modulation; search algorithms; signal points; subcarrier system; tone injection method; Block codes; Channel capacity; Constellation diagram; Costs; Digital communication; Digital-analog conversion; OFDM modulation; Peak to average power ratio; Quadrature amplitude modulation; Transmitters;
Conference_Titel :
Communications, 2001. ICC 2001. IEEE International Conference on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-7097-1
DOI :
10.1109/ICC.2001.937170
