Capacity of polarization and amplitude modulated links in the presence of atomospheric scintillation.
A transmission channel may be characterized by its capacity, i.e., the largest quantity of mean mutual information transmitted between the emitter and the receiver. The channel we have studied is a light beam traveling in the low atmosphere, and the capacity has been calculated for polarization (PCM/PL) and intensity (IM) modulation, assuming a Poisson detection process and log-normal fluctuations for scintillation. The depolarization of light has been neglected, and the polarizers have been considered perfect. The appended graphs show that PCM/PL modulation has a greater capacity in all investigated cases.
Lamouroux
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Prade
B S
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