Information capacity of direct detection optical transmission systems
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💻 cs.IT
math.ITphysics.optics
keywords
detectiondirectcapacityefficiencyspectralsystemsystemstransmission
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We show that the spectral efficiency of a direct detection transmission system is at most 1 bit/s/Hz less than the spectral efficiency of a system employing coherent detection with the same modulation format. Correspondingly, the capacity per complex degree of freedom in systems using direct detection is lower by at most 1 bit.
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