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In this paper, a novel phase noise estimation method (PNE) for multi-level modulations is proposed based on local optimization (LO PNE). The effectiveness of this method is demonstrated and discussed in a 200G bit/s coherent transmission system. It has been proved, the usage of throwing-point (TP) test rotation and convex programming in LO_PNE reduce the complexity of phase estimation for arbitrary...
A new feedback symbol timing recovery technique using timing estimation joint equalization is presented for digital receivers with two samples/symbol or higher sampling rate. The clock recovery algorithm in this paper is different from the traditional method, using different algorithm by distinguishing the phase of adjacent symbols. A new timing algorithm is proposed for the adjacent signals with...
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