Author : Monika Patil 1
Date of Publication :7th May 2016
Abstract: Clipping and filtering methods is considered one of the simplest ways to cut down high peak to average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. The existing simplified CF method clips the high PAPR in single iteration with reduced complexity. However, these low complexity methods depend upon large complicated fast Fourier transform procedures. In this paper we come up with an advanced method which adopts trained ANN to incorporate with the SCF algorithm. Compared to SCF method, the advanced proposal based on ANN and SCF method provides good performance with respect to bit error rate (BER) with incomparably shortened computing complications. In addition to this it also presents an attractive metric which is a more efficient predictor than peak to average power ratio.
Reference :
- [1] Y. Jabrane, V. P. G. Jimenez, A. G. Armada, B.
A.E. Said, and A. A. Ouahman, Reduction of
power envelope fluctuations in OFDM signals by
using neural networks,IEEE Commun. Lett., vol.
14, no. 7, pp. 599601, Jul. 2010.
[2] Sohn, A low complexity PAPR reduction scheme
for OFDM systems via neural networks, IEEE
Commun.Lett., vol. 18, no. 2, pp. 225228, Feb.
2014.
[3] J. Armstrong, Peak-to-average power reduction
for OFDM by repeated clipping and frequency
domain filtering, Electron. Lett., vol. 38, no. 5,pp.
246247, Feb.2002.
[4] Ahmad, Uzair, et al. "CompoNet:
programmatically embedding neural networks
into AI applications as software
components." Tools with Artificial Intelligence,
2007. ICTAI 2007. 19th IEEE International
Conference on. Vol. 1. IEEE, 2007.
[5] L.Wang and C. Tellambura, A simplified clipping
and filtering technique for PAR reduction in
OFDM systems, IEEE Signal Process. Lett., vol.
12, no. 6, pp. 453456, Jun. 2005.
[6] S. H. Han and J. H. Lee, An overview of peak-to
average power ratio reduction techniques for
multicarrier transmission, IEEE Wireless
Commun., vol. 12, no. 2, pp. 5665, Apr. 2005.
[7] T. Jiang and Y.Wu, An overview: Peak-toaverage power ratio reduction techniques for OFDM signals,IEEE Trans. Broadcast., vol. 54,
no. 2, pp. 257268, Jun. 2008.
[8] “Cubic metric in 3GP-LTE,†3rd Generation
Partnershp Project (3GPP), Sophia-Antipolis,
France, TSG RAN WG1, Tech. Rep. TDoc R1-
060023,Jan. 2006.