An algorithm for PAPR reduction by SLM technique in OFDM with hadamard matrix row factor

PAPR Reduction in Cyclic Prefix OFDM (5G) System using Group Codeword Shifting Technique

“…In SLM technique it reduces PAPR value but at the same time it compromises the data rate of the system and also the computational complexity. For to choosing which technique that can reduce high PAPR value few criteria need to taking into account such as BER degradation at receiver, data rate loss, computational complexity, power increment in transmitted signal, PAPR reduction capability and bandwidth expansion [13][14][15]. The Selective Codeword Shift (SCS) technique has shown significant improvement reducing PAPR compared original signal and conventional SLM, however this technique only effective for modulation higher than 4 QAM or higher than 2 bits per symbol.…”

New Efficient PAPR Reduction Schemes in LTE OFDM Systems

“…Signal scrambling techniques do not twist the structure of the OFDM signal and no spectral regrowth occur. These schemes incorporate coding schemes [1][2][3] which cause no distortion and make no out of band radiation, but experience from bandwidth efficiency as the code rate is lessened and also suffer from complexity to discover best codes for an expansive number of subcarriers, both PTS [4][5][6][7][8][9] and SLM [10][11][12][13][14][15] schemes accomplish significant PAPR reduction at the expense of high computational complexity and data rate loss (side information). Signal distortion methods introduce spectral regrowth or distort the spectrum of the signal and transmit a PAPR signal with no extra data.…”