Abstract: Disclosed herein are a method and apparatus for generating a Grover oracle quantum circuit, and the Grover oracle quantum circuit using the same. The method may include analyzing data qubits and sub-qubits used for a design of an analysis target cipher quantum circuit configured to implement an analysis target cipher based on the analysis target cipher quantum circuit, generating a dagger quantum circuit based on the analysis target cipher quantum circuit, generating a phase inversion quantum circuit configured to invert a phase of a target qubit by comparing output qubits of the analysis target cipher quantum circuit with a preset comparison target value, configuring a Grover oracle using the analysis target cipher quantum circuit, the dagger quantum circuit, and the phase inversion quantum circuit, allocating the data qubits and the sub-qubits, and generating a Grover oracle quantum circuit based on allocation information of the data qubits and the sub-qubits.

Abstract: Disclosed herein are a cryptographic operation apparatus and method using a quantum circuit. The cryptographic operation apparatus includes one or more processors, and execution memory configured to store at least one program executed by the one or more processors, wherein the processors are configured to allocate input data corresponding to a finite field for calculating a substitution box to qubits, perform a field transformation on the input data allocated to the qubits from a finite field into data qubits corresponding to a composite field, set auxiliary qubits corresponding to the data qubits, calculate a multiplicative inverse for the data qubits using the data qubits and the auxiliary qubits, perform a field inverse transformation on a result of calculation of the multiplicative inverse into a finite field, and output a result of calculation of the substation box from a result of calculation of the field inverse transformation through affine transformation.

Abstract: A control device for breeding insects includes a database storing a combination of environmental factors relating to the growth of a feed insect and the nutrient after feed processing. Sensors detect an environmental factor relating to a breeding farm and a growth and development state of the insect. A processing unit receives input on expected demand and shipment time of feed produced from the feed insect, calculates a growth rate of the feed insect, required from the current farm according to input expected demand and shipment time and the detected growth and development state, and reads a combination of environmental factors from the database in consideration of the detected environmental factor and the calculated growth rate. A control unit controls growth of the feed insect by adjusting a growth and development control factor corresponding to each environmental factor according to the combination of environmental factors from the processing unit.

Abstract: When a disaster occurs, a disaster information transmitting apparatus generates disaster information, spreads the disaster information with a spreading code, modulates the spread disaster information, and transmits the modulated disaster information using a guard band of a broadcasting frequency band.

Abstract: An apparatus and method for calculating a correlation value using a first channel impulse response estimated from a received signal, determining a weight value based on the correlation value, applying the weight value to the first channel impulse response, and estimating a second channel impulse response is provided.

Abstract: An apparatus for transmitting a main broadcasting signal and additional data in a digital broadcasting system includes: an orthogonal sequence generation unit configured to generate an orthogonal sequence having orthogonality with the main broadcasting signal; an orthogonal sequence delay unit configured to delay the generated orthogonal sequence according to inputted additional data; a signal mixing unit configured to mix the delayed orthogonal sequence with the main broadcasting signal and generate a mixed signal; and a transmission unit configured to transmit the mixed signal.

Abstract: Provided is an apparatus for channel equalization in frequency domain, including: a channel estimation unit for estimating a channel on received signal from outside, a channel matched filter for changing channel characteristic of the channel estimated by the channel estimation unit and the received signal to channel characteristic to meet condition required for noncausal filtering, a noncausal filter for changing the channel characteristic changed by the channel matched filter from nonminimum phase channel to minimum phase channel, a reverse channel calculation unit for calculating a reverse of the channel changed by the noncausal filter in frequency domain, and a frequency domain equalization unit for performing channel equalization with respect to the channel changed by the noncausal filter in the frequency domain by using the reverse obtained by the reverse channel calculation unit as coefficients of the frequency domain equalization apparatus.

Abstract: A data transmission apparatus of a communication system includes a main data generator configured to generate main data corresponding to a main broadcasting service of broadcasting services; a main signal generator configured to generate a main signal of the main data; an additional data generator configured to generate a plurality of additional data corresponding to various additional services of the broadcasting services; an additional signal generator configured to generate a plurality of additional signals of the plurality of additional data; a power controller configured to control average power of the plurality of additional signals; a coupler configured to couple the main signal and the plurality of additional signals controlled in the average power thereof, and generate a broadcasting signal; and a transmitter configured to transmit the broadcasting signal.

Abstract: A decision feedback equalization apparatus includes a channel estimation unit estimating a channel on received signal based on the received signal and a training sequence; a channel matched filter maximizing SNR from the channel estimated by the channel estimation unit changing channel characteristics of the received signal; a noncausal filter approximating the changed channel; an equalizer input signal storage unit storing received symbols passed through the channel matched and the noncausal filters; a channel equalization unit performing a decision feedback equalization; a Trellis decoder detecting symbol from a channel-equalized signal; a mode selection unit selecting a specific mode; an error signal calculator comparing an output signal of the selected mode with an output signal of the channel equalization unit to calculate an error signal; and a tap coefficient updater updating tap coefficients to the channel equalization unit, an output signal from the storage unit, and an output signal from the Trellis

Abstract: Provided is a decision feedback equalization apparatus including a channel estimation unit for estimating a channel on received signal based on the received signal and a training sequence; a channel matched filter for maximizing SNR from the channel estimated by the channel estimation unit to change channel characteristic of the received signal; a noncausal filter for approximating the channel changed by the channel matched filter from nonminimum phase channel to minimum phase channel; an equalizer input signal storage unit for storing received symbols passed through the channel matched filter and the noncausal filter; a channel equalization unit for performing a decision feedback equalization through filtering of a signal passed through the channel matched filter and the noncausal filter; a Trellis decoder for detecting symbol from a signal channel-equalized by the channel equalization unit; a mode selection unit for selecting a specific mode; an error signal calculator for comparing an output signal of the

Abstract: Provided is an apparatus for channel equalization in frequency domain, including: a channel estimation unit for estimating a channel on received signal from outside, a channel matched filter for changing channel characteristic of the channel estimated by the channel estimation unit and the received signal to channel characteristic to meet condition required for noncausal filtering, a noncausal filter for changing the channel characteristic changed by the channel matched filter from nonminimum phase channel to minimum phase channel, a reverse channel calculation unit for calculating a reverse of the channel changed by the non-causal filter in frequency domain, and a frequency domain equalization unit for performing channel equalization with respect to the channel changed by the noncausal filter in the frequency domain by using the reverse obtained by the reverse channel calculation unit as coefficients of the frequency domain equalization apparatus.