Optical receiver for receiving digitally transmitted data
AssigneeAlcatel
InventorBerthold Wedding
Life of this patent
Estimating the term…
Abstract
An optical receiver for receiving digitally transmitted data, the receiver containing connected a digital filter 2 and a decision circuit 3 to it for detecting the incoming data signals 1, and a clock contact 15, the decision circuit being connected with a computing unit 5 and containing a pseudo-error monitor circuit for detecting bit errors, and parameters of the digital filter 2 and of the decider/pseudo-error monitor circuit 3 being adjustable by the computing unit 5 connected to them.
Claims20
An optical receiver for receiving digitally transmitted data (1) that is distorted especially because of linear and/or non-linear effects of the data transmission line, the receiver containing a filter (2) and a decision circuit (3) for detecting the incoming data signals (1), and a clock contact (15), the decision circuit (3) being connected to a computing unit (5), whereby the decider circuit (3) contains a pseudo-error monitor circuit for threshold-value-dependent and phase-dependent detection of bit errors, and parameters of the filter (2) and of the decider/pseudo-error monitor circuit (3) can be adjusted by the computing unit (5) connected to them.
An optical receiver according to one of the preceding claims whereby the RS flip-flop (13) stores a bit error temporarily and the computing unit (5) returns the RS flip-flop (13) to its original state with an individual error reset (10) after the second bit error signal (9A) has been read out.
An optical receiver as per one of the preceding claims whereby several deciders (FS1 . . . FSN) are connected together in parallel with a switch (19) that is connected to the EXOR circuit (12), and a signal level adjustment (6) of the computing unit (5) causes the switch (19) to change state.
Optical receiver as per one of the preceding claims whereby the filter is constructed of amplifiers (22) with fixed or variable delay time, the input amplifier (22) being connected to the output amplifiers (25) by adjustable digital multiplier units (23).
Dependencies are inferred from the claim text.