Hybrid optical–digital signal processing applied to an optimal nonlinear phase estimator
W. E. Stephens, William H. Steier · Applied Optics · 1983
An electrooptical realization of an optimal phase estimator for phase modulated communication signals is described in this work. The realization uses an electrooptical processor to perform a 1-D convolution in a 2-D space and a computer to complete the calculations. The processor is a realization of the time domain recursive nonlinear filter. This paper describes the nonlinear filter theory, the electrooptical realization,and the performance of the processor.