Abstract: An interference determination apparatus, including a signal receiver to receive a first signal of a primary network and a second signal of a secondary network; a correlator to compute a correlation value of a first cyclic prefix included in the first signal and a correlation value of a second cyclic prefix included in the second signal; and an interference determination unit to determine an interference level or whether the interference occurs between the primary network and the secondary network, using the correlation value of the first cyclic prefix and the correlation value of the second cyclic prefix.

Abstract: A system on chip (SoC) structure of a video codec-embedded image sensor and a method of driving an image sensor using the same are provided. The image sensor includes a first domain including a codec processing unit processing image data using a video codec and a core processor, a second domain including an image sensor pixel and an analog-to-digital converter (ADC), a third domain including an image signal processor (ISP) performing signal processing on the image data obtained from the second domain, a fourth domain including a formatter converting a data format of the data generated in the first to third domains to the outside, an a clock generation unit providing system clocks to the first to fourth domains, respectively.

Abstract: A communication method for at least one mobile station that includes a target mobile station that performs a Cooperative Multi-Point (CoMP) communication with at least two base stations, is provided. The communication method includes determining a beamforming vector used by the at least two base stations based on channel vectors and at least one channel matrix such that a signal-to-leakage-plus-noise-ratio (SLNR) for a target antenna from among antennas of a target mobile station is maximized. A Cholesky factorization may be used to determine an optimal beamforming vector with a low complexity.

Abstract: A method of assigning and managing reference signals in a multi-cell environment, and a network device and a terminal for applying the method, are provided. Reference signal patterns may be assigned to multiple femtocells through a long term coordination of a central control unit that is used to control multiple cells.

Abstract: Provided is a radio communication system for ultra wideband (UWB) impulse communications and a radio communication apparatus and method thereof. The present patent provides a radio communication system that can minimize power consumption by eliminating a need for carrier detection and sharing transmission/reception time information in UWB impulse communications. The system includes a network coordinator; and one or more devices communicating on a superframe basis in subordination to the network coordinator. The devices perform data transmission/reception in predetermined time slots and then they are inactivated to thereby reduce power consumption.

Abstract: A low density parity code (LDPC) encoding and decoding devices and encoding and decoding methods thereof are provided. An LDPC encoding device includes an information obtaining unit which obtains status information of at least two frequency bands, a matrix generation unit which generates a parity check matrix based on the status information, the parity check matrix including sub matrices which correspond to the at least two frequency bands, and an encoder which generates data bits and parity bits using an LDPC with the generated parity check matrix.

Abstract: A cognitive radio (CR) communication apparatus and method is provided. A cognitive radio (CR) communication apparatus includes a signal receiving unit which receives signals from a primary user of a primary system and a secondary transmitter of a secondary system, the received signals including an element associated with at least one known signal of the secondary transmitter, and a determination unit which determines whether a signal of the primary user exists from among the received signals based on the element associated with the at least one known signal.

Abstract: An interference determination apparatus, including a signal receiver to receive a first signal of a primary network and a second signal of a secondary network; a correlator to compute a correlation value of a first cyclic prefix included in the first signal and a correlation value of a second cyclic prefix included in the second signal; and an interference determination unit to determine an interference level or whether the interference occurs between the primary network and the secondary network, using the correlation value of the first cyclic prefix and the correlation value of the second cyclic prefix.

Abstract: Provided is a radio communication system for ultra wideband (UWB) impulse communications and a radio communication apparatus and method thereof. The present patent provides a radio communication system that can minimize power consumption by eliminating a need for carrier detection and sharing transmission/reception time information in UWB impulse communications. The system includes a network coordinator; and one or more devices communicating on a superframe basis in subordination to the network coordinator. The devices perform data transmission/reception in predetermined time slots and then they are inactivated to thereby reduce power consumption.

Abstract: Provided is a communication system for ultra wide band impulse communication, and more particularly, to a communication apparatus and method that can be used in a sensor network or a low-rate wireless personal area network. To be more specific, the present research suggests a transmitter employing multi-coded bi-orthogonal pulse position modulation/demodulation and a method thereof.

Abstract: An apparatus generates a scrambling code in a mobile communication system by performing one or more mask operations on an input state value. The apparatus includes a register memory which receives the state value from an upper layer of the system, a generator which generates an extended state value by performing a mask operation based on initial values of the state value, and a code generator which generates a scrambling code based on at least a first state value which is continuously selected from among the extended state value, a second state value generated based on at least state values (L,R) which correspond to the first state value, and an initial value which has not been used from the initial values.

Abstract: The present invention discloses a method for searching multipaths of a mobile communication system, which includes the steps of: performing a coherent detection on a reversed I and Q channel signals of a DPCCH transmitted form a mobile station, multiplying the detected signal by a pilot pattern to accumulate a pilot symbol section in a corresponding section, and performing a coherent accumulation on the other symbol section in a symbol basis; calculating energy value for each coherently accumulated I and Q channel signals; multiplying the calculated energy values by a weight that has been multiplied by the pilot symbol section and another weight that has been multiplied by the other symbol section, respectively; noncoherently accumulating the energy values multiplied by variable weights, and saving the energy values; comparing the saved energy values with a periodically designated threshold; and searching timing information as many as a number of fingers in order of highest energy value according to the compa

Abstract: A method for generating scrambling codes in a mobile communications system generates an extended code performing a masking operation. A movable selector performs the mask operation to extract continued bits from the extended code under control of a controller. A masked code is selected by the selector, and the selected code and another masked code are subjected to an EXOR operation to generate a scrambling code.

Abstract: The present invention discloses a method for searching multipaths of a mobile communication system, which includes the steps of: performing a coherent detection on a reversed I and Q channel signals of a DPCCH transmitted form a mobile station, multiplying the detected signal by a pilot pattern to accumulate a pilot symbol section in a corresponding section, and performing a coherent accumulation on the other symbol section in a symbol basis; calculating energy value for each coherently accumulated I and Q channel signals; multiplying the calculated energy values by a weight that has been multiplied by the pilot symbol section and another weight that has been multiplied by the other symbol section, respectively; noncoherently accumulating the energy values multiplied by variable weights, and saving the energy values; comparing the saved energy values with a periodically designated threshold; and searching timing information as many as a number of fingers in order of highest energy value according to the compa