Peak-To-Average Power Ratio (PAPR) Reduction in Ofdm Systems Using Dummy Signal Hybrid Slm-Pts Technique

摘要

OFDM is a promising technique for the present generation communication systems where high data rate and fading channels are of major concern. However still some challenging issues remain unresolved in the design of OFDM systems. One of the major problem is high PAPR. The high PAPR of transmitted systems reduces the system efficiency and hence increases the cost of Radio Frequency(RF) Power Amplifier and also degrades the BER. In this paper, a Dummy Signal H ybrid (DH) SLM-PTS scheme is proposed to obtain the better PAPR reduction performance with reduced computational complexity. The simulation results are examined with other hybrid schemes and found that DH scheme provides better PAPR reduction performance compared to other hybrid schemes but at the cost of computational speed , because each time it compares the PAPR o f the signal with threshold value and generates dummy signal accordingly with reduced PAPR