José R. F. da Rocha John J. O'Reilly Linear Direct-Detection Fiber-Optic Receiver Optimization in the Presence of Intersymbol Interference. 365-374 1986 34 IEEE Trans. Commun. 4 https://doi.org/10.1109/TCOM.1986.1096543 db/journals/tcom/tcom34.html#RochaO86