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The localization principle and error source of DV-Hop algorithm which is classic self-localization algorithm in wireless network are introduced in this paper. Aiming at the disadvantage of DV-Hop algorithm on localization accuracy, an improved scheme by modifying the average hop distance is proposed. The simulation results show that the comprehensive properties of the improved algorithm (including...
This paper introduces a modulation scheme, dicode pulse position modulation (DiPPM) for optical wireless communications using intensity modulation with direct detection (IM/DD). The modulation structure of DiPPM and expressions for the bandwidth-utilization efficiency, average optical power requirement and packet error rate (PER) are presented. We show that there is a built-in error checking-out performance...
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