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arXiv 0903.1820cs.ITmath.IT
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自由空间光强信道容量的研究

On the Capacity of Free-Space Optical Intensity Channels

Amos Lapidoth, Stefan M. Moser, Michele A. Wigger

摘要:

给出了自由空间光强信道容量的新的上界和下界。该信道的特征在于非负输入(表示传输的光强度)和被加性高斯白噪声破坏的输出(因为在自由空间中,干扰来自许多独立的源)。由于电池和安全原因,输入同时受到平均和峰值功率的限制。对于平均功率与峰值功率的固定比率,当平均功率趋于无穷大时,上界与下界之间的差趋于零,并且当平均功率趋于零时,上界与下界的比率趋于一。单独处理的情况下,只有平均功率约束施加在输入上。在这种情况下,当平均功率趋于无穷大时,上界和下界的差趋于0,并且当功率趋于零时,它们的比率趋于常数。

英文摘要:

New upper and lower bounds are presented on the capacity of the free-space optical intensity channel. This channel is characterized by inputs that are nonnegative (representing the transmitted optical intensity) and by outputs that are corrupted by additive white Gaussian noise (because in free space the disturbances arise from many independent sources). Due to battery and safety reasons the inputs are simultaneously constrained in both their average and peak power. For a fixed ratio of the average power to the peak power the difference between the upper and the lower bounds tends to zero as the average power tends to infinity, and the ratio of the upper and lower bounds tends to one as the average power tends to zero. The case where only an average-power constraint is imposed on the input is treated separately. In this case, the difference of the upper and lower bound tends to 0 as the average power tends to infinity, and their ratio tends to a constant as the power tends to zero.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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