Abstract:
Disclosed are blockchain type contract terminal and method using position information. There are provided: an input module that is inputted with a contract term regarding an object of contract; a position information collection module that collects, in real time, position information of the object at the time of contract; a contract creation module that creates a contract by using the contract term inputted by the input module and the position information at the time of contract collected in real time by the position information collection module; a blockchain creation module that encrypts the contract created by the contract creation module to create a blockchain; and a blockchain distributed storage control module that transmits the blockchain created at the blockchain creation module to another terminal in a P2P manner for storing on a network in a distributed manner.
Abstract:
Disclosed are blockchain type contract terminal and method using a digital contents original confirmation key. There are provided: an input module that is inputted with a contract term regarding an object of contract; a position information collection module that collects, in real time, position information of the object at the time of contract; a contract creation module that creates a contract by using the contract term inputted by the input module and the position information at the time of contract collected in real time by the position information collection module; a digital contents original confirmation key interface module that provides the contract term inputted by the input module and the position information at the time of contract collected in real time by the position information collection module to a contents initializer and an international authentication adjustment server, and receives a digital contents original confirmation key from the contents initializer or the international authentication adjustment server; a digital contents original contract creation module that combines the digital contents original confirmation key received at the digital original confirmation key interface module with the contract created at the contract creation module to create a digital contents original contract; a blockchain creation module that encrypts the contract created by the digital contents original contract creation module to create a blockchain; and a blockchain distributed storage control module that transmits the blockchain created at the blockchain creation module to another terminal in a P2P manner for storing on a network in a distributed manner.
Abstract:
Provided is an apparatus and method for generating I/Q signals in a multi-port network, which can generate I/Q signals with accurate coordinates and sizes by repeatedly controlling the coordinates and size of an initial parameter in accordance with a predetermined reference condition. The I/Q signal generating apparatus of a multi-port network includes a multi-port network unit, a signal generation unit, and a control unit. The multi-port network unit converts a receive (RX) signal into a plurality of phase signals with different phases in accordance with a predetermined reference signal. The signal generation unit restores original data on the basis of the power of the phase signals received from the multi-port network unit. The control unit controls the restoration operation of the signal generation unit to be repeated so that the original data restored by the signal generation unit satisfies a predetermined reference range.
Abstract:
There are provided a direct sampling type wireless receiver and a method using the same that reduce nonlinearity and DC offset by using a multi-port network and a carrier frequency direct conversion method with a low sampling rate of a direct sampling method in a wireless communication receiver. A direct sampling type wireless receiver according to an aspect of the invention includes: a reference signal generation unit supplying a first reference signal having a predetermined frequency and a second reference signal having a higher frequency than the first reference signal; a down sampling unit sampling an input RF signal according to the first reference signal; an analog-to-digital converting unit converting the signal sampled by the down sampling unit into a digital signal according to the second reference signal; and a multiple-input multiple-output port unit dividing the digital signal from the analog-to-digital converting unit into a plurality of digital signals, generating a plurality of carrier signals having different phases from each other by shifting phases of the digital signals, and outputting a plurality of phase signals having different phases from each other by adding the plurality of carrier signals and the plurality of digital signals to each other.
Abstract:
There is provided a distance measuring apparatus having system flexibility by varying a distance measuring range and a distance measuring resolution according to an environment and circumstance. The apparatus includes a reference pulse generator and a delay pulse generator capable of controlling frequencies of a reference pulse and a delay pulse and duty ratios of the reference pulse and the delay pulse. The reference pulse generator and the delay pulse generator include a programmable clock generation unit generating a clock of a frequency determined by a frequency control signal and a duty ratio control unit controlling a duty ratio of the clock generated by the programmable clock generation unit.
Abstract:
A parallel sequence spread spectrum type chaotic signal transmission device is disclosed to convert a serial data signal into a parallel data signal and transmit a chaotic signal according to the converted data signal. The parallel sequence spread spectrum type chaotic signal transmission device includes: a signal converting unit that converts serial data desired to be transmitted into parallel data having a pre-set unit; a chaotic signal generating unit that generates a pre-set chaotic signal; and an amplifying unit that amplifies the chaotic signal from the chaotic signal generating unit according to the data which has been converted by the signal converting unit.
Abstract:
A ranging apparatus includes a reference pulse generator generating a reference pulse having a first frequency at a first point in time of transmitting a ranging signal from a first device; a delay pulse generator generating a delay pulse signal having a second frequency at a second point in time of receiving the a response signal transmitted from the second device in response to the ranging signal; an overlap detector detecting a third point in time that the reference and delay pulses overlap each other; a counter counting one of the reference and delay pulses until the third point; and a distance calculator calculating an amount of time from the first point to the second point by applying the first and second frequencies, and a count value of the counter and calculating the distance between the first device and the second device by using the amount of time.
Abstract:
Provided is a digital modulation circuit constructed with only a digital circuit. The digital modulation circuit includes: a clock generator which generates a reference clock pulse having a predetermined period; an up/down counter which generates a count value having predetermined bits by up-counting or down-counting the reference clock pulse and outputs a bit in the count value as a transmission signal; a controller which determines a counting start/end time point of the up/down counter and determine which one of the up-counting operation and the down-counting operation of the up/down counter is to be performed, according to a value of digital transmission data that is to be transmitted; and a band-pass filter which converts a waveform of the transmission signal output from the up/down counter into a sine waveform.
Abstract:
A location awareness system using RFID and a wireless communication apparatus for the location awareness are provided. The location awareness system includes a RFID tag, a wireless communication apparatus for location awareness, more than three anchors, a coordinator, and a server. The wireless communication apparatus identifies the target object with the RFID attached through communicating with the RFID tag. The anchors receive information about the identified target object and measuring a distance by communication with the wireless communication apparatus using a predetermined wireless communication scheme. The coordinator collects the measure distance and the information from each of the anchors. The server calculates a location of the target object by receiving information about the measured distances and the target objects from the coordinator and calculating the location of the wireless communication apparatus using the received information.
Abstract:
A visible light communication apparatus for a vehicle is provided. The visible light communication apparatus for the vehicle includes a vehicle optical receiver for receiving a visible light signal including a tunnel light node ID, a front passing vehicle node ID, and tunnel environment data, from a tunnel light and converting the visible light signal to an electric signal; and a vehicular visible light emitting diode unit arranged to face the optical receiver for converting vehicle speed and location information calculated by counting tunnel light node IDs received over a certain time, to a visible light signal and sending the visible light signal to the tunnel light. Using the vehicular visible light communication apparatus and the tunnel light having the visible light communication function, an efficient vehicular communication system can be built in the tunnel.