| 摘要 |
The invention refers to a device (1) for decoding an optical multi-level DPSK signal (E), the device (1) comprising: means for receiving the multi-level DPSK signal (E); at least two means (3) for transforming optical multi-level DPSK signals (E) into corresponding analog electrical signals (i); means (2) for splitting up the received multi-level DPSK signal (E) into at least two optical multi-level DPSK signals (E0), one for each of the opto-electrical transforming means (3); means (8) for processing electrical signals (i, e); and at least two means (6) for transforming the analog electrical signals (i) into corresponding electrical logical binary signals (e). In order to provide multi-level DPSK receiver (1) with a reduced complexity, it is suggested that concerning the signal flow within the device (1) the analog-to-logical-binary transformation means (6) are disposed before the processing means (8) and that the processing means (8) process electrical logical binary signals (e).
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