Digital Transmission. Phase Diversity Optical Coherent Reception Experiment of DQPSK Signals
ディジタル伝送 光DQPSK信号の光位相ダイバーシチコヒーレント受信実験

Masao Yamamoto, Hiroyuki Furuta, Mikio Maeda, Kimiyuki Oyamada, Noboru Toyama
1998 The Journal of The Institute of Image Information and Television Engineers  
A phase-diversity technique is a viable technique for transmitting wideband TV programs with closely-arranged optical signals in broadcasting stations. This paper describes DQPSK coherent detection using phase diversity. An excellent BER of 10-" was achieved with a received optical power of -27 dBm at 2.97 Gb/s. 2.97 Gb/s corresponds to the transmission rate of two channels of the uncompressed digitalized HDTV signals. Optical intensity modulation with a microwave subcarrier is a key technology
more » ... that can achieve QPSK coherent detection more easily than the direct optical phase modulation technology proposed so far.
doi:10.3169/itej.52.1637 fatcat:f72bltxw7rh25ppc4rdnzxd3oy