Experimental demonstrations of DSP-enabled flexibility, adaptability and elasticity of multi-channel >72Gb/s over 25 km IMDD transmission systems

DSP-enabled multi-channel aggregation techniques are promising for cost-effectively improving the flexibility, adaptability and elasticity of fronthaul transport networks. By utilizing orthogonal digital filtering in IMDD transmission systems, two matching filter (MF)-free respectively based on SSB OFDM DSB have been reported; however, (DSB) technique has a drawback relatively high DSP complexity (reduced to physical layer system characteristics). To effectively overcome these drawbacks associated with techniques, this paper, MF-free adaptively variable SSB/DSB is proposed experimentally demonstrated, which >72Gb/s@25 km transmissions achieved. This work also evaluates, first time, adaptability, filtering-enabled techniques. The results show that not only maintains technique’s excellent but possesses low features.