Digital Signal Processing Algorithms and Systems Performance
Digital signal processing (DSP) is the principal functionality of modern optical communications systems, employed at both the coherent optical receivers and the transmitter. At the transmitter, the DSP is employed to shape the pulse at the output of optical modulators, and compensate for the limited bandwidth of the digital-to-analog converter (DAC) as well as that of the transfer characteristics of the electro-optic external modulators, deskewing of the electrical path differences between the inphase and quadrature phase signals that occur often in ultra-high speed systems. It is noted that the mixing of the received signals and the local oscillator (LO) ...
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