Differential Phase-Shift Keying in Spatial Diversity Transmitters for Fade Mitigation

作者：Ulmer Todd G^*; Henion Scott R; Walther Frederick G; Schulz Peter A

来源：IEEE Journal of Selected Topics in Quantum Electronics, 2010, 16(5): 1091-1098.

DOI：10.1109/JSTQE.2009.2036861

• Differential phase-shift keying (DPSK)
• diversity methods
• fading channels
• optical amplifiers
• optical communication
• random media

We investigate the use of differential phase-shift keying (DPSK) in multiwavelength spatial diversity transmitters for mitigation of atmospheric fading. By selecting the transmitter wavelengths to coincide with the transmission peaks of the delay-line interferometer in the receiver, the only modification required to a standard DPSK receiver is a wider optical filter. We examine the wavelength separation required to minimize penalties from beating between the wavelengths and find that a separation of twice the data rate is sufficient for a four-wavelength system with narrow filtering. We also demonstrate a reduction in scintillation loss for a four-wavelength DPSK system in a fading channel.

• 出版日期2010-10