PAPR Reduction by Partial Transmit Sequence and Complexity Reduction by ABC Algorithm

摘要

In the LTE, OFDM is the multicarrier technology used for the downlink data transmission of the multicarrier signal. OFDM (orthogonal frequency division multiplexing) the main well known drawback is peak average power ratio (PAPR). Due to the increase in the PAPR the power amplifier of the transmission must be operated in high back-off region in order to be in the linear region. The system efficiency will be decreased so PAPR is considered as the primary concern to be eliminated. PTS is the technique used for the reduction of PAPR. The PTS(partial transmit sequence) has the high complexity factor in IFFT and FFT computations, this paper gives the study of the PAPR with modified partial transmit sequence and the complexity of the PTS has been reduced by using the artificial bee algorithm(ABC). The desired PAPR can be achieved by using the noise shaping, this reduction technique is performed by using 16QAM, with 2048 sub carriers having the block size of 4 different phase factors a 4.1db PAPR reduction at complementary cumulative distribution function (CCDF) level and EVM of 6% is achieved.