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We review the progresses made towards real-time implementation of optical OFDM, with emphasis on the needed digital signal processing (DSP). Various OFDM procedures and algorithms are discussed in the context of DSP-efficiency and resource requirement.
Recent results of real-time coherent optical OFDM receiver are reviewed. Requirements and challenges pertaining to high-speed real-time implementation of CO-OFDM receiver are discussed. An implemented receiver in a FPGA at 2.5GSamples/s is described.
We demonstrate the real-time implementation of a FPGA-based coherent optical OFDM (CO-OFDM) receiver at 2.5-G samples/s, which successfully receives a subband of a 54-Gb/s multi-band CO-OFDM signal with a record-low error floor of 3.7 times 10-8.
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