Abstract:
PROBLEM TO BE SOLVED: To provide a transmission/reception beam formation device for an active phased-array antenna in which not only a microwave amplifier, a digital phase shifter, and a digital attenuator, but also a digital circuit for controlling them are integrated in one MMIC chip so that a small, light, and low-costed active phased-array antenna system can be achieved.SOLUTION: A transmission/reception beam formation device for an active phased-array antenna includes: an amplifier amplifying an inputted RF signal; at least one attenuator adjusting an amplitude of the RF signal by a first control signal; at least one phase shifter adjusting a phase of the RF signal by a second control signal; and a serial-to-parallel converter converting an inputted serial data signal into parallel first and second control signals, and applying the first and second control signals to the attenuator and the phase shifter respectively. The amplifier, the attenuator, the phase shifter, and the serial-to-parallel converter are integrated in one MMIC chip.
Abstract:
PROBLEM TO BE SOLVED: To provide a sensor automatic vending system.SOLUTION: By automatically selling a sensor without a manual operation, a sensor automatic vending system allows a user to easily purchase a desired sensor whenever anywhere and easily use sensing information and allows a personalized sensor network service to be easily applicable.
Abstract:
PROBLEM TO BE SOLVED: To provide a method of correcting a depth image based on a relation between a depth sensor and an image capturing camera.SOLUTION: A depth image correction device includes: a three-dimensional point determination part for determining a point in the three dimensions of a camera image and a point in the three dimensions of a depth image simultaneously captured with the camera image; a correction information determination part for determining correction information for correcting the error of a depth sensor that has captured the depth image and a geometric relation between the depth sensor and the image capturing camera using the point in the three dimensions of the camera image and the point in the three dimensions of the depth image; and a depth image correction part for correcting the depth image based on the correction information and the point in the three dimensions of the depth image.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for conveniently and safely encrypting and decrypting session state information which is resident in a resistor or a volatile memory such as an RAM while a software encryption product for information protection performs an encryption arithmetic operation by a computer.SOLUTION: The encryption method of session state information includes: a step of, on the basis of the ID of an encryption session corresponding to session state information to be encrypted and the value of a session annihilation counter corresponding to the encryption session, calculating the value of the counter corresponding to the session state information to be encrypted; and a step of, on the basis of the value of the counter calculated in the step of calculating the value of the counter and a predetermined key, encrypting the session state information to be encrypted.
Abstract:
PROBLEM TO BE SOLVED: To provide a system, a terminal, a server, and a method for providing a rich application-based multi-screen IPTV service.SOLUTION: The present invention provides a system, a terminal, a server, and a method for providing a rich application-based multi-screen IPTV service. The system includes: an IPTV system providing an IPTV service to two or more terminals; and a multi-screen management server supporting a multi-screen service of the IPTV service provided by the IPTV system by interworking with a multi-screen management module.