1998 Volume 52 Issue 11 Pages 1637-1642
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 10-11 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 that can achieve QPSK coherent detection more easily than the direct optical phase modulation technology proposed so far.
The Proceedings of the Circle of Television Engineers
The Proceedings of the Institute of Television Engineers
The Proceedings of the Institute of Television Engineers
The Institute of Image Information and Televistion Engineers
The Journal of the Institute of Television Engineers of Japan
The Journal of the Institute of Television Engineers of Japan