Huawei consolidates its strategy around in the high-speed transmission field: Stakes and opportunities.

Progressively this Chinese company paves its way around the 400G technologies.

Until now, Connectikpeople.co has captured several achievements including: in June 2012, Huawei and KPN International completed the ‘world's’ first 400G field trial. In December 2012, Huawei conducted the ‘world's’ first 2T field trial with Vodafone, achieving 2 Tbit/s transmission over a distance of up to 3,325 km. In March 2013, Huawei unveiled a 40T WDM

prototype, at the OFC/NFOEC2013 event in America.

In the same momentum, last week, Huawei and EXATEL, a telecommunications operator in Poland, had jointly declared that they have successfully tested the first 400G WDM (Wavelength Division Multiplexing) system.

Connectikpeople.co recalls that, according to Huawei, currently, the mainstream commercial 40G/100G WDM systems use a single carrier wave. However, on a 400 Gbit/s system, the baud rate doubles, which causes serious distortion of high-speed signals and unstable clocks. To solve these issues, existing 400G systems use multiple aggregated carrier waves, that is, multiple sub-carrier waves are aggregated to form a super channel.

We have also observed that, Huawei adopts the Faster than Nyquist (FTN) compensation and recovery algorithm, proprietary clock recovery technology, and adaptive soft decision FEC (Adaptive-SDFEC) technology, to address the problems of high-speed signal distortion and unstable clocks.