Mitsubishi Electric has developed an error-correction method for optical communications that achieves a coding gain of 12.0dB.
Mitsubishi Electric said its new error-correction technology enables transmissions four times longer than conventional codes, such as Reed-Solomon codes standardized by ITU-T G.709. As a result, the technology enables long-haul transoceanic transmissions, such as those between Japan and the United States (about 9,000km), at 100 Gbps per wavelength for high-capacity communication systems.
The new technology leverages low-density parity-check (LDPC) code, which uses sparse parity check matrices for high-level error correction. The R&D was conducted under the "Lambda Reach Project" of Japan's National Institute of Information and Communication Technology (NICT).