Title :
A comparison of several gradient based optimization algorithms for PAPR reduction in OFDM systems
Author :
Koussa, B. ; Bachir, S. ; Perrine, Clency ; Duvanaud, C. ; Vauzelle, R.
Author_Institution :
XLIM-SIC Lab., Univ. of Poitiers, Poitiers, France
Abstract :
The aim of this paper is to evaluate and compare different optimization algorithms for Peak to Average Power Ratio (PAPR) reduction in Orthogonal Frequency Division Multiplexing (OFDM) systems. Based on Tone Reservation (TR) method, we exploit the unused subcarriers of the studied standard to generate the peak canceling signal without data rate loss. Gradient, Conjugate-Gradient with two directions search and QuasiNewton methods have been investigated and evaluated on the basis of spectral regrowth, convergence speed and ability to improve the high peak-to-average reduction in multicarriers systems. As an example, the simulations are performed in the case of Local Area Network WLAN (IEEE 802.11a standard). Simulation results show that a PAPR reduction gain around 3 dB can be achieved.
Keywords :
Newton method; OFDM modulation; conjugate gradient methods; optimisation; wireless LAN; IEEE 802.11a; OFDM systems; PAPR reduction; TR method; WLAN; conjugate gradient methods; gradient based optimization algorithms; orthogonal frequency division multiplexing; peak to average power ratio; quasi-Newton methods; tone reservation method; wireless local area network; Convergence; Optimization; Peak to average power ratio; Standards; Time domain analysis; Vectors; Gradient based optimization methods; OFDM system; PAPR reduction; Tone Reservation;
Conference_Titel :
Communications, Computing and Control Applications (CCCA), 2012 2nd International Conference on
Conference_Location :
Marseilles
Print_ISBN :
978-1-4673-4694-8
DOI :
10.1109/CCCA.2012.6417865
