PAPR Reduction in All-optical OFDM Systems Based on Phase Pre-emphasis

Abstract

Abstract. This paper investigates the peak-to-average power ratio (PAPR) theory in all-optical orthogonal frequency division multiplexing (OFDM) optical fibre communication systems. We find out that phase pre-emphasis could effectively reduce PAPR in all-optical OFDM communication systems which employ intensity modulation-direct detection (IM-DD) method. An equation is developed and proposed to calculate suitable phasing values for pre-emphasis. Furthermore, we find out that phase pre-emphasis cannot reduce PAPR effectively in all-optical OFDM systems that employ Phase Shift Keying (PSK) or Quadracture Amplitude Modulation (QAM) method.

International Journal of Electronics and Telecommunications

“…Finding an effective solution of nonlinear mitigation has been an attractive research topic for last decade [5][6][7][8][9][10][11][12][13][14][15][16][17]. For optical OFDM systems, the nonlinear compensation methods can be classified into two groups, namely optical domain and digital domain methods.…”

“…Although the optical domain methods based on optical phase conjugation (OPC) show a remarkable performance improvement in long-range OFDM systems [5][6][7], they require a strict setup of the fiber link that is unsuitable for NG-PONs. Digital domain methods are implemented in digital domain to compensate the nonlinear impairments in both fiber transmission and electronic components [8][9][10][11][12][13][14][15][16][17]. In which many methods inherited from wireless communication systems have been investigated to improve the performance of the IM-DD OFDM communication systems by reducing the PAPR of the OFDM signal [8][9][10][11][12].…”

“…Digital domain methods are implemented in digital domain to compensate the nonlinear impairments in both fiber transmission and electronic components [8][9][10][11][12][13][14][15][16][17]. In which many methods inherited from wireless communication systems have been investigated to improve the performance of the IM-DD OFDM communication systems by reducing the PAPR of the OFDM signal [8][9][10][11][12]. In general, these techniques provide a good PAPR reduction, but they also add more complexity to both the transmitter and the receiver of the OFDM system.…”