TY - JOUR
T1 - Evaluation of performance improvement capabilities of PAPR-reducing methods
AU - Deumal, Marc
AU - Behravan, Ali
AU - Eriksson, Thomas
AU - Pijoan, Joan Lluís
N1 - Funding Information:
Acknowledgements This work has been funded by COST289 “Spectrum and Power Efficient Broadband Communications”, the Spanish Government under the project CGL2006-12437-C02-01 and the PCC++ program from Sweden.
PY - 2008/10
Y1 - 2008/10
N2 - One of the major drawbacks of multicarrier modulation is the large envelope fluctuations which either require an inefficient use of high power amplifiers or decrease the system performance. Peak-to-average power ratio (PAPR) is a very well known measure of the envelope fluctuations and has become the cost function used to evaluate and design multicarrier systems. Several PAPR-reducing techniques have been proposed with the aim to alleviate back-off specifications or increase the system performance. Besides the fact that these techniques have varying PAPR-reduction capabilities, power, bandwidth and complexity requirements, it is interesting to notice that the performance of a system employing these techniques has not been fully analyzed. In this paper we, first, develop a theoretical framework for both PAPR and the distortion introduced by a nonlinearity, and then simulate an OFDM system employing several well known PAPR-reducing techniques from the literature. By means of the theoretical analysis and the simulation results we will show the relation between PAPR and the performance of OFDM systems when a clipping device is present and we will evaluate the real performance improvement capabilities of the PAPR-reducing methods. The agreement between the theoretical and the simulation results demonstrate the validity of the analysis.
AB - One of the major drawbacks of multicarrier modulation is the large envelope fluctuations which either require an inefficient use of high power amplifiers or decrease the system performance. Peak-to-average power ratio (PAPR) is a very well known measure of the envelope fluctuations and has become the cost function used to evaluate and design multicarrier systems. Several PAPR-reducing techniques have been proposed with the aim to alleviate back-off specifications or increase the system performance. Besides the fact that these techniques have varying PAPR-reduction capabilities, power, bandwidth and complexity requirements, it is interesting to notice that the performance of a system employing these techniques has not been fully analyzed. In this paper we, first, develop a theoretical framework for both PAPR and the distortion introduced by a nonlinearity, and then simulate an OFDM system employing several well known PAPR-reducing techniques from the literature. By means of the theoretical analysis and the simulation results we will show the relation between PAPR and the performance of OFDM systems when a clipping device is present and we will evaluate the real performance improvement capabilities of the PAPR-reducing methods. The agreement between the theoretical and the simulation results demonstrate the validity of the analysis.
KW - Nonlinear distortion
KW - Orthogonal frequency division multiplexing (OFDM)
KW - Peak-to-average power ratio (PAPR)
UR - http://www.scopus.com/inward/record.url?scp=50249089685&partnerID=8YFLogxK
U2 - 10.1007/s11277-007-9397-6
DO - 10.1007/s11277-007-9397-6
M3 - Article
AN - SCOPUS:50249089685
SN - 0929-6212
VL - 47
SP - 137
EP - 147
JO - Wireless Personal Communications
JF - Wireless Personal Communications
IS - 1
ER -