Characterization of the performance of optical amplitude-shift keying-differential phase-shift keying orthogonally modulated signals.
We analytically investigate the signal performance of orthogonal modulation with slow amplitude-shift keying (ASK) data superimposed upon a high-speed differential phase-shift keying (DPSK) signal. The receiver sensitivities for both the ASK and the demodulated DPSK signals are formulated based on a probability model, and their dependence on the bit rate and the extinction ratio of the ASK data is theoretically investigated. A simple result of analysis of DPSK data performance has been derived. We verified the analytical results by experimental measurements.
Deng
Ning
N
Department of Information Engineering, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China. ndeng@ieee.org
Chan
Chun-Kit
CK
Chen
Lian-Kuan
LK