A New DCT Precoding Based RSLM Method for PAPR Reduction in OFDM System

Prof Girraj Prasad Rathor; Mr. Chandan Premchand Singh; Prof. Vikas Gupta

Orthogonal Frequency Division Multiplexing (OFDM) is one of promising techniques that has the problem of high Peak-to-Average Power Ratio (PAPR) which limits its applications in communications system. In this paper, we present a new Discrete cosine Transform (DCT) precoded based Recursive Selected Mapping (RSLM) technique for PAPR reduction in OFDM system. The proposed system is based on precoding the constellation symbols with DCT precoder after the multiplication of phase rotation factor and before the Inverse Fast Fourier Transform (IFFT) in RSLM-OFDM Systems. By using this technique, the proposed scheme achieves much better PAPR reduction performance as compared to Recursive SLM technique. The performance of the proposed hybrid technique (DCT-RSLM) is verified through the simulations.

Select Volume / Issues:

• Volume 3 Issue 6, Nov. 2012

Year:

2012

Type of Publication:

Article

Keywords:

Orthogonal Frequency Division Multiplexing OFDM; Peak-to-Average Power Ratio PAPR; Direct Cosine Transform DCT; Recursive Selected Mapping RSLM

Journal:

IJECCE

Volume:

3

Number:

6

Pages:

1509-1512

Month:

November