Frequency Offset Estimation in a Polarization-Multiplexed Coherent OFDM system stressed by chromatic dispersion and PMD

Dual-polarization multi-band optical OFDM transmission and transceiver limitations for up to 500 Gb/s uncompensated long-haul links

“…The DAC/ADC clipping ratio and quantization have been taken into account and set to 13 dB and 10-bits, respectively, which have no impact on the performance of OFDM signals for subcarrier number >32 [12,14,16]. Similar observations occur when no DAC/ADC clipping ratio and quantization bits are considered [12,14,16]. The DP-MB-OFDM system is generated by four OFDM sub-bands per polarization.…”

“…The adopted SSMF parameters in this paper are the following: fiber nonlinear Kerr parameter, CD, CD-slope, fiber loss, and PMD coefficient of 1.1 W −1 km −1 , 16 ps/nm/km, 0.06 ps/km/nm 2 , 0.2 dB/km and 0.1 ps/km 0.5 , respectively. It should be noted that the transceivers parameters of DP-MB-OFDM are similarly to those described in [12][13][14]. The DP-MB-OFDM transceiver parameters are summarized on Table 1.…”

“…Another main advantage of MB-OFDM is its capability to optically switch at the sub-wavelength granularities thanks to the MB structure [11]. It should be noted that MB-OFDM approach is a pertinent alternative to single-carrier modulations providing similar transmission distances and offering natural rectangular spectrum [12][13][14]. In contrast to Nyquist-WDM [15], MB-OFDM technology does not require complex digital signal processing (DSP) to mitigate signal distortion induced by the transceivers filtering and additionally the ROADM cascadability is more efficient.…”

“…After having answered to the aforementioned statement in [12][13][14], where it was shown that 100 Gb/s DP-MB-OFDM and single-carrier DP-QPSK have nearly the same performance after 10 × 100 km of G.652 fiber; here, we thoroughly explore the DP-MB-OFDM transmission and transceiver limitations to maximize performance. This paper addresses for the first time the following issues:…”

Dual-polarization multi-band OFDM signals for next generation core networks

“…It should be noted that MB-OFDM approach is a pertinent alternative to single-carrier modulations providing similar transmission distances and offering natural rectangular spectrum [12][13][14]. In contrast to Nyquist-WDM, MB-OFDM technology does not require complex digital signal processing (DSP) to mitigate signal distortion induced by the transceivers filtering and additionally the ROADM cascadability is more efficient.…”