  Orthogonal Frequency Division Multiplexing (OFDM) is an efficient method of
data transmission for high speed communication systems. However, the main
drawback of OFDM system is the high Peak to Average Power Ratio (PAPR) of the
transmitted signals. OFDM consist of large number of independent subcarriers,
as a result of which the amplitude of such a signal can have high peak values.
Coding, phase rotation and clipping are among many PAPR reduction schemes that
have been proposed to overcome this problem. Here two different PAPR reduction
methods e.g. partial transmit sequence (PTS) and selective mapping (SLM) are
used to reduce PAPR. Significant reduction in PAPR has been achieved using
these techniques. The performances of the two methods are then compared.

Networking and Internet Architecture