Theoretical and Experimental Investigation of Direct Detection Optical OFDM Systems with Clipping and Normalization

Table 1

Simulation parameters.

Dispersion coefficient,	17 ps/(nm km)
Optical carrier wavelength ()	1550 nm
Modulation	QPSK
Sample rate	4 Gs/s
FFT size	256
Number of data subcarriers	192
Number of pilot subcarriers	8
Null subcarriers	56
Length of CP	32
L (length of the fiber)	100 km