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Feedforward carrier recovery via pilot-aided transmission for single-carrier systems with arbitrary M-QAM constellations
We exploit pilot-aided (PA) transmission enabled by singlesideband (SSB) subcarrier modulation of both quadrature signals in the DSP domain to achieve fully feedforward carrier recovery (FFCR) in singlecarrier (SC) coherent systems with arbitrary M-QAM constellations. A thorough mathematical description of the proposed PA-FFCR is presented, its linewidth tolerance is assessed by simulations and compared to other FFCR schemes in literature. Also, implementation and complexity issues of PA-FFCRdoi:10.1364/oe.19.024331 pmid:22109460 fatcat:vo2skn2navdbjld2xuaw6pfnnu