Title :
Improving PA efficiency by chaos-based spreading in multicarrier DS-CDMA systems
Author :
Vitali, Stefano ; Rovatti, Riccardo ; Setti, Gianluca
Author_Institution :
Bologna Univ.
Abstract :
In this paper, we investigate the effect of spreading sequences on the peak-to-average power ratio (PAPR) in order to improve the power amplifier efficiency of multicarrier direct-sequence code-division multiple access systems. Baseband shaping has been identified to have a key role in reducing PAPR by spreading and we have found that chaos-based spreading sequences give good results as compared with Gold and i.i.d. sequences behaving differently depending on the number of subcarriers
Keywords :
chaos; code division multiple access; power amplifiers; spread spectrum communication; subcarrier multiplexing; baseband shaping; chaos-based spreading; multicarrier DS-CDMA systems; multicarrier direct-sequence code-division multiple access systems; peak-to-average power ratio; power amplifier efficiency; spreading sequences; Analytical models; Baseband; Chaos; Computational modeling; Computer simulation; Multiaccess communication; OFDM modulation; Peak to average power ratio; Power amplifiers; Radio transmitters;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1692805
