Seung Sik Lee

TL;DR: In this article, a planar monopole antenna with a staircase shape and small volume (25times26times1 mm3) was proposed for ultrawideband (UWB) systems.

TL;DR: In this paper, a reception signal including an STF (short training field) in which a plurality of patterns are repeatedly transmitted is received, the STF including a first number of STF patterns and a second number of StF patterns having an opposite code to that of the first STF pattern.

TL;DR: In this paper, a base station and a terminal for supporting a low power mode are provided, where the base station transmits a first type of beacon signal for a terminal operating in a normal mode, a second type of beacons signal for an operating terminal in a low-power mode, and a charging signal for the operating terminal.

TL;DR: In this paper, the authors proposed a watermarking method for protecting the copyright of digital data, which includes the step of dividing each of two successive frames into at least two sub-groups, adding and subtracting a value, which varies according to pixel locations, to and from a specific component value at each pixel location of the subgroups using Just Noticeable Difference (JND) values and averages of the specific component values at pixel locations of corresponding subgroups of the two consecutive frames.

TL;DR: In this article, a digital phase-locked loop apparatus using FSK includes a PFD detecting phase differences between a reference clock and a frequency-divided signal, and a first adder for generating first digital control codes by adding first digital codes, second digital codes and channel frequency codes including channel information to each other.