MULTIPLE DMB1C DMB1M CODING SCHEME FOR HIGH-SPEED OPTICAL MULTIPLEX TRANSMISSION/

This paper describes a new multiple DmB1C (Differential m Binary 1 Com plement insertion) /DmB1M (Differential m Binary with 1 Mark insertion ) coding scheme for high-speed optical multiplex transmission. The cod ing scheme has the characteristics of small consecutive identical digi ts and a good balance between marks and spaces. Furthermore, it has al so good synchronization characteristics and higher flexibility for ext ension to high capacity transmission than the conventional mB1C or DmB 1M coding schemes. We describe a design methodology for a multiplex tr ansmission system using the proposed coding scheme, and verify the cha racteristics of the proposed coding scheme using an experimental setup of a 2.8 Gbit/s serial optical interconnection circuit, which has 16 parallel 156 Mbit/s inputs. The coding scheme realizes transmission sy stems with simple analog circuit configuration, and small digital circ uit complexity with wide dynamic range and good mark ratio tolerance.