Date Added: Sep 2012
Communication methods are increasing day by day. Orthogonal Frequency Division Multiplexing (OFDM) systems are one of the most recent emerging trends in wireless communication. However, the major drawback of OFDM is the high Peak-to-Average Power Ratio (PAPR) which results in the Bit Error Rate (BER) performance degradation. A number of approaches have been proposed to deal with the PAPR problem. In this paper, PAPR reduction in OFDM systems is based on combining Low-Density Parity Check (LDPC) codes and Discrete Cosine Transform (DCT) with companding technique.