The carrier to signal power ratio (CSPR) in a directdetection
optical orthogonal frequency division multiplexing
(OFDM) system based on remote heterodyne scheme is optimized
in a passive optical network (PON) downlink. A numerical
investigation shows that nonlinearities in fiber have the effects
of increasing the optimum CSPR and making the system more
vulnerable to CSPR changes.
Cano, I., Santos, M., Prat, J. Optimum carrier to signal power ratio for remote heterodyne DD-OFDM in PONs. "IEEE photonics technology letters", Juliol 2013, vol. 25, núm. 13, p. 1242-1245.