Interleaving Technique Implementation to Reduce PAPR of OFDM Signal in Presence of Nonlinear Amplification with Memory Effects

• Published in: Journal of Telecommunications and Information Technology 2018-10, Vol.3 (2018), p.14-22
• Main Authors: Aimer, Younes, Seddik Bouazza, Boubakar, Bachir, Smail, Duvanaud, Claude
• Format: Article
• Language: English
• Subjects: Bit error rate; Computer memory; Computer Science; Computer simulation; Decoding; downward compatibility; Efficiency; Electronics; Engineering Sciences; Expected values; Fourier transforms; interleaver key; interleaving technique; Local area networks; Methods; Networking and Internet Architecture; OFDM systems; PAPR reduction; Power amplifiers; Reduction; Signal and Image Processing; Subcarriers; Transmitters; Wireless communications; Wireless networks
• ISSN: 1509-4553; 1899-8852
• DOI: 10.26636/jtit.2018.123517

In OFDM systems, peak-to-average power ratio (PAPR) reduction of the signal is one of the main challenges that need to be overcome in order to use the transmitter in an efficient manner. As one of attractive techniques, interleaving can be used in PAPR reduction for multicarrier signals without spectrum distortion. In this paper, the authors propose to extend the possibilities of interleaving to improve PAPR reduction, to use a new coding of interleaver keys at the transmitter and a robust decoding procedure at the receiver. In order not to degrade the data rate, the use of null subcarriers to transmit side information to the receiver is proposed and evaluated. Simulation results in the context of the WLAN 802.11a standard in the presence of a nonlinear power amplifier model with memory, show a reduction of PAPR of approximately 5.2 dB, and an improvement of bit error rate and error vector magnitude of about 2 decades and 4% respectively, while respecting the spectral mask specification.