Probabilistic shaping QAM dynamic equalization and digital signal processing method

Abstract

Probabilistic shaping quadrature amplitude modulation based on Maxwell-Boltzmann distribution is particularly important in coherent optical communication, and can more ideally approach the Shannon limit under the condition of limited signal-to-noise ratio. However, a standard coherent optical digital signal processing algorithm is not optimal for demodulation of PS high-order QAM signals, and the invention provides a probabilistic shaping QAM dynamic equalization method, equipment and device, a computer storage medium and a probabilistic shaping QAM digital signal processing method. A convergence radius and a region of a traditional blind dynamic channel equalization algorithm are updated by using a peak density K-means clustering algorithm, the peak density clustering algorithm gives a center point label and a classification number required by K-means, and the K-means does not need to carry out a large amount of iteration, so that the overall complexity is reduced, the accuracy is improved, and the method is suitable for large-scale popularization and application. The updated decision area and decision radius enable the error of the dynamic equalization algorithm to be reduced, thereby further improving the precision of probabilistic shaping QAM digital signal processing.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a probability shaping QAM dynamic equalization method, equipment, device, computer storage medium and probability shaping QAM digital signal processing method. Background technique [0002] The advancement of digital coherent transceivers and the use of complex modulation formats has further promoted the development of optical fiber communication. In particular, the demand for data center load capacity is increasing, and intensity modulation direct detection (IM / DD) is about to face a bottleneck. High-capacity, high-spectrum transmission between data centers is driving the development of high-order quadrature amplitude modulation (QAM) coherent optical communications. Recently, the emergence of probability shaping has brought innovations to coherent optical communication, bringing the transmission system closer to the Shannon limit, and further promoting the ultra...

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Problems solved by technology

[0004] For this reason, the technical problem to be solved by the present invention is to overcome the impact of strong shaping and non-optimal OSNR on dynamic equalization in the prior art, thus resulting in digital signal processing accuracy low problem

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