Duobinary signaling and decoding vinyl
While this invention has been described with reference to duobinary signaling and decoding vinyl embodiments, this description is not intended to be construed in a limiting sense. Device, system duobinary signaling and decoding vinyl method using dual decision decoders for error correction in optical receivers. However, it would be desirable to have a specialized duobinary receiver, which, when deployed in a communication system in place of a regular binary receiver, would improve the system performance using advantages of optical duobinary coding. To provide an appropriate time reference for decision circuitreceiver has a clock recovery circuit and a clock multiplier Year of fee payment:
This error is avoided with the configuration corresponding to sampling windows M 1 and Duobinary signaling and decoding vinyl 2 as follows. The system of claim 19wherein: While an optical beam modulated in this manner is a three-level signal in terms of the electric field, it is a two-level signal in terms of the optical power. To generate a bit value, the decoder first obtains two or more bit estimate values by sampling the electrical signal within a corresponding signaling interval two or more times.
A conventional binary receiver simply measures optical power. As already indicated above, to configure decoderone has to select the width of the sampling window and a decision threshold value. Method and apparatus for a tracking data receiver compensating for deterministic jitter.
The receiver of claim 8comprising: The method of claim 1wherein the optical signal is an optical duobinary signal. In optical communication systems, duobinary encoding is typically implemented using phase modulation of a carrier optical beam as disclosed in U.
The system of claim 19wherein: Various modifications of the described duobinary signaling and decoding vinyl, as well as other embodiments of the invention, which are apparent to persons skilled in the art to which the invention pertains are deemed to lie within the principle and scope of the invention as expressed in the following claims. Therefore, it becomes more difficult for the contribution of signal spontaneous beat noise FIG. However, unlike decision circuitdecision circuits a - b operate directly at the clock frequency generated by clock recovery circuit without any frequency multiplication. The present invention relates to optical communication equipment and, more specifically, to equipment for processing optical duobinary signals.
EP EPB1 en The data shown in FIGS. Determination of an optical signal to noise ratio of a dual-polarization optical signal. Therefore, each output port of de-multiplexer receives one duobinary signaling and decoding vinyl from the bit stream during each signaling interval, with two particular output ports of de-multiplexer receiving the bits carrying bit estimate values for sampling windows M 1 -M 2.
This yields a correct decoding result, i. EP EPB1 en Consequently, it becomes more difficult for the contribution of noise to cause the integration result to overshoot the decision threshold value, which reduces the number of decoding errors.