PAPR reduction technique by inserting a power-concentrated subcarrier for CO-OFDM

Experimental emulation of nonlinear distortion suppression by FrOFDM subcarriers

“…Furthermore, OFDM allows high tolerance of residual dispersion and the required performance of the receiver can be reduced by inserting a cyclic prefix (CP) [11]. This multiplexing scheme is, however, characterized by nonlinear distortion resulting from the high peak-to-average power ratio (PAPR) and many methods for suppressing the effects of nonlinear distortion have been proposed [12][13][14][15]. The N-OTDM technique is a multiplexing scheme in which Nyquist pulses are temporally arranged and, hence, PAPR can be reduced [16].…”

A Scaling Scheme for DCT Precoded Optical Intensity-Modulated Direct Detection Systems

“…Therefore, a large number of PAPR reduction schemes have been proposed for applications in optical communication systems, such as clipping [2,3], Hadamard precoding [4], DFT precoding [5,6], combined Hadamard and companding transforms [7], Partial Transmit Sequence (PTS) [8], and Selected Mapping (SLM) [9,10]. There are also other PAPR reduction schemes, such as power-concentrated subcarrier and preemphasis, which have been proposed by other researchers [11,12]. These PAPR reduction methods can be mainly divided into two domain methods: frequency domain method and time domain method [13].…”