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The selected mapping (SLM) scheme is a competent method for reducing the high peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. One drawback of the conventional SLM (C-SLM) scheme is the high computational complexity. To reduce the complexity of C-SLM, the real and imaginary parts of the OFDM signals are treated separately. The even and odd sequences of the real and imaginary parts are obtained using the Fourier transform properties. More candidates are generated by the different combination of all the sub-sequences. The proposed scheme has a lower computational complexity using only M inverse fast Fourier transform (IFFT) operations to generate M 4 candidates. The simulation results show that the proposed scheme achieves good PAPR reduction performance and also reduces the computational complexity significantly compared with the C-SLM scheme.
References
-
-
1)
-
5. Fischer, R.F.H.: ‘Widely-linear selected mapping for peak-to-average power ratio reduction in OFDM’, Electron. Lett., 2007, 43, (14), pp. 766–767 (doi: 10.1049/el:20071177).
-
2)
-
Y. Li ,
L.J. Cimini
.
Bounds on the interchannel interference of OFDM in time-varying impairments.
IEEE Trans. Commun.
,
401 -
404
-
3)
-
4. Li, D.Y., Yu, J.C., Wang, M.Q.: ‘An improved SLM scheme with low implementation complexity to reduce PAPR performance of OFDM systems’. Int. Congress on Image and Signal Processing, Hangzhou, China, December2013, pp. 1499–1503, .
-
4)
-
A. Jayalath ,
C. Tellambura
.
SLM and PTS peak-power reduction of OFDM signals without side information.
IEEE Trans. Wirel. Commun.
,
2006 -
2013
-
5)
-
1. Nee, R.V., Prasad, R.: ‘OFDM for Wireless Multimedia Communications’ (Artech House, Norwell, MA, USA, 2000).
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