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OFDM is based on multicarrier modulation technique. In OFDM systems the bit streams is divided into many different sub streams and send these over to many different sub channels. A subcarrier carrying the portion of the user information is transmitted in each band .Each subcarrier is orthogonal with every other subcarrier. Presence of large number of subcarriers with varying amplitude results in high Peak to Average Power Ratio (PAPR) which is the major drawback in OFDM systems. In this paper, the authors propose a SLM technique using hadamard transform to reduce the PAPR of OFDM systems. For further reduction of PAPR a new SLM method is proposed.
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