Abstract: A visible light communication (VLC) method in which a transmission device having a display transmits a signal to a reception device having a camera according to the present invention includes outputting, by the transmission device, a visible light signal including data for transmission (referred to as “transmission data” below) through the display using at least one of a color and a pattern, and receiving, by the reception device, the visible light signal through the camera and extracting the transmission data.

Abstract: A visible light communication (VLC) method in which a transmission device having a display transmits a signal to a reception device having a camera according to the present invention includes outputting, by the transmission device, a visible light signal including data for transmission (referred to as “transmission data” below) through the display using at least one of a color and a pattern, and receiving, by the reception device, the visible light signal through the camera and extracting the transmission data.

Abstract: The present invention provides a smart device which can receive, by an image sensor of a camera, a visible light signal generated by a light-emitting source such as a lighting apparatus or a display, and which can transmit the visible light signal to another terminal and light-emitting source by an LED flash of the camera, thereby enabling transmission and reception of visible light communication by the camera, which is equipped as standard in the smart device, as well as enabling transmission and relay of data by connecting to RF communication such as WiFi, Bluetooth and UWB.

Abstract: The present invention provides a smart device which can receive, by an image sensor of a camera, a visible light signal generated by a light-emitting source such as a lighting apparatus or a display, and which can transmit the visible light signal to another terminal and light-emitting source by an LED flash of the camera, thereby enabling transmission and reception of visible light communication by the camera, which is equipped as standard in the smart device, as well as enabling transmission and relay of data by connecting to RF communication such as WiFi, Bluetooth and UWB.

Abstract: This invention is concerned with a transmission control method and apparatus in a collision interval for a collision of multidimensional hopping patterns. In the present invention, each orthogonal wireless resource in the coordinate of the multidimensional orthogonal resource can hop according to the hopping pattern negotiated between a transmitter and a receiver, and each corresponding channel is distinguished by the hopping pattern. A specific multidimensional hopping pattern is allocated to each secondary station. The hopping pattern is either permanently allocated to the secondary stations or temporarily allocated from the primary station during a call set-up. The permanent allocation of the hopping pattern to the secondary stations is achieved when the hopping pattern is identified based on a unique identifier, such as ESN of the secondary station.

Abstract: A communication system generates a continuously orthogonal spreading code for a user, a user signal is spreading-modulated by using the continuously orthogonal spreading codes, and then the spread signal is pre-rake combined and transmitted. A receiver processes the received signal by using a matched filter for one path.

Abstract: The proposed invention relates to the interference-free Ultra-Wide Band (UWB) wireless communication system using spreading codes with low correlation duration or Zero Correlation Duration (ZCD) property, the communication processing technique of the system and the record media of the program through the computer.

Abstract: This invention is concerned with a transmission control method and apparatus in a collision interval for a collision of multidimensional hopping patterns. In the present invention, each orthogonal wireless resource in the coordinate of the multidimensional orthogonal resource can hop according to the hopping pattern negotiated between a transmitter and a receiver, and each corresponding channel is distinguished by the hopping pattern. A specific multidimensional hopping pattern is allocated to each secondary station. The hopping pattern is either permanently allocated to the secondary stations or temporarily allocated from the primary station during a call set-up. The permanent allocation of the hopping pattern to the secondary stations is achieved when the hopping pattern is identified based on a unique identifier, such as ESN of the secondary station.

Abstract: The proposed invention relates to the interference-free Ultra-Wide Band (UWB) wireless communication system using spreading codes with low correlation duration or Zero Correlation Duration (ZCD) property, the communication processing technique of the system and the record media of the program through the computer.

Abstract: Ternary spreading codes in which side lobes near a peak of auth-correlation and cross-correlation are zero for a duration equal to or less than (0.75N+1) chips for a N chip period code are generated. The ternary spreading codes of the present invention is generated by (a) generating ternary zero correlation duration preferred pair codes, in which the zero correlation duration of (0.75N+1) chips is retained, by expanding a N chip period of a code, N being a natural number; and (b) generating a plurality of ternary zero correlation duration code sets having zero correlation characteristic equal to or less than (0.75N+1) chips by shifting the generated ternary zero correlation duration preferred pair codes in chips.

Abstract: Ternary spreading codes in which side lobes near a peak of auth-correlation and cross-correlation are zero for a duration equal to or less than (0.75N+1) chips for a N chip period code are generated. The ternary spreading codes of the present invention is generated by (a) generating ternary zero correlation duration preferred pair codes, in which the zero correlation duration of (0.75N+1) chips is retained, by expanding a N chip period of a code, N being a natural number; and (b) generating a plurality of ternary zero correlation duration code sets having zero correlation characteristic equal to or less than (0.75N+1) chips by shifting the generated ternary zero correlation duration preferred pair codes in chips.