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Orthogonal frequency division multiplexing achieved predominant applications in both wired and wireless communication systems, for its flexibility when transmission comprises of multipath distortion. Bipolar waveform can't be used in IM/DD system. New methods for OFDM called DC biased OFDM, ACO OFDM and SSB OFDM allow unipolar waveform which has been implemented in recent days. In this paper, a linear...
An injection-locked laser based pilot carrier enhancement technique is proposed for self-coherent OFDM. An improvement of 2.2 dB is observed when compared to Fabry-Perot filter based self-coherent OFDM.
We theoretically study the stability of single-sideband-modulator based recirculating frequency shifter (RFS) used for Tb/s multi-carrier optical transmission, in the presence of modulator nonlinearity and optical amplifier noise. Optimum operation conditions are found for various scenarios.
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