OptiX OSN 9800 ePDM-QPSK (enhanced Polarization Division Multiplexing-Quadrature Phase Shift Keying) modulation, i.e. Polarization Multiplexing QPSK, is a technology based on the DQPSK modulation technique, which makes use of the orthogonal polarization characteristics of light, and performs QPSK modulation on both X/Y polarization modes of light separately. QPSK modulation is based on the DQPSK modulation technique, using the orthogonal polarization characteristics of light, in the light of the X / Y two polarization modes, respectively, QPSK modulation technology.

The ePDM-QPSK technique enables twice as much data to be transmitted at the same wavelength compared to the DQPSK technique. If ePDM-QPSK is used while increasing the baud rate by 1.25 times, the rate of a single wavelength of 40 Gbit/s can be increased to 2 × 1.25 × 40 = 100 Gbit/s, thus accomplishing 100G wavelength transmission, making the bandwidth of WDM optical transmission increase by 2.5 times.

ePDM-QPSK is the best solution for 100G WDM transmission.

The related technical information in this chapter and the troubleshooting process of SDH equipment are collected and organized by Shenzhen Optical Transmission Network Technology Company Limited (www.opticaltrans.com), please retain! Our company specializes in Huawei SDH optical transmission equipment,SDH transmission equipment sales.