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PAPR reduction performance analysis of Optimized Matrix based Phase Sequences in OFDM systems

Orthogonal Frequency Division Multiplexing (OFDM) is the digital multicarrier modulation scheme for high speed communication systems. One of the major problems in OFDM is the occurrence of high Peak to Average Power Ratio (PAPR). Due to high PAPR the signal leads to out-of-band (OBO) distortion and increase in Bit Error Rate (BER). The reduction in PAPR is desirable in order to obtain the power efficiency of the amplifier at the transmitter. This paper proposes a Matrix based Phase Sequences (MPS) using special matrices for reducing PAPR of the OFDM signals, in addition to greater reduction in computational complexity. This technique does not require the transmission of Side Information (SI) to the receiver for original phase recovery. OFDM system is implemented in several broadband communication systems like Wireless Local Area Network (WLAN), Worldwide interoperability for Microwave Access (WiMax), Digital Video Broadcasting (DVB) and Digital Audio Broadcasting (DAB). The results show that the proposed scheme offers better PAPR reduction with less computational complexity. Power Saving gain analysis also performed for the proposed scheme.