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Real-Time 2.5 GS/s Coherent Optical Receiver for 53.3-Gb/s Sub-Banded OFDM

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6 Author(s)
Kaneda, N. ; Bell Labs., Alcatel-Lucent, Murray Hill, NJ, USA ; Qi Yang ; Xiang Liu ; Chandrasekhar, S.
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A real-time receiver for the coherent optical orthogonal frequency-division multiplexing (CO-OFDM) detection is realized in a field-programmable gate array (FPGA). Each building block of the CO-OFDM receiver, such as symbol synchronization, channel estimation, and phase estimation is described and discussed in respect of special technical requirements of real-time implementation. The real-time receiver is successfully demonstrated with a receiver sampling rate of 2.5-Gsamples/s to receive a subband of 53.3-Gb/s multiband CO-OFDM signal. The measured bit error rate (BER) is as low as 3.7 ?? 10-8 which is a record in real-time or offline CO-OFDM demonstration.

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Lightwave Technology, Journal of  (Volume:28 ,  Issue: 4 )