Abstract: Provided are a wireless communication apparatus and a channel estimation methods of the wireless communication apparatus. The channel estimation methods includes receiving a first sub-frame and a second sub-frame, the first sub-frame including a plurality of first reference signals pre-coded based on a first pre-coding matrix and the second sub-frame including a plurality of second reference signals pre-coded based on a second pre-coding matrix; determining whether the first pre-coding matrix and the second pre-coding matrix are the same, based on a channel variation in the time domain; and performing, in response to determining that the first pre-coding matrix and the second pre-coding matrix are the same, channel estimation with respect to a resource element included in the second sub-frame based on at least of the plurality of first reference signals and at least one of the plurality of second reference signals.

Abstract: Some example embodiments include methods of operating a wireless communication device supporting carrier aggregation, the methods include allocating a memory of a plurality of memories to each of a plurality of component carriers based on a memory allocation priority; determining a demodulation priority for each of the plurality of component carriers based on one of a size of each memory allocated to each of the plurality of component carriers, and the memory allocation priority; and demodulating signals received via the plurality of component carriers based on the demodulation priority.

Abstract: A device for performing wireless communication at least one processor configured to generate a condition signal based on at least one parameter associated with the device or the wireless communication, and select at least one of a plurality of signal processing algorithms for performing at least one of a plurality of signal processing functions based on the condition signal, each of the plurality of signal processing functions being associated with the wireless communication.

Abstract: A wafer cleaning apparatus includes a wafer roller to rotate a wafer in a first direction, first and second roller brushes disposed to be parallel to each other, the first and second roller brushes to be brought into contact with opposing surfaces of the wafer to clean the opposing surfaces of the wafer, respectively, while rotating in mutually opposing directions, first and second pipes having a longitudinal direction parallel to each other, the first and second pipes being above the first and second roller brushes and conveying a cleaning liquid for cleaning the wafer, first and second nozzle groups disposed along the longitudinal direction of the pipes, respectively, and including a plurality of nozzles to spray the cleaning liquid onto the opposing surfaces of the wafer at a predetermined angle, respectively, and a binding part connecting the first and second pipes to restrain movement of the first and second pipes.

Abstract: An apparatus and a method for controlling power consumption of a terminal in a wireless communication system are provided. The method includes deactivating one or more of hardware components for signal reception in a transmission interval if there is no data to be received in the transmission interval, and receiving a control signal by activating all the components in a next transmission interval.

Abstract: Provided is a data decoding method of a wireless communication device. The method includes receiving a plurality of sub-frames. The method further includes accumulating data signals respectively included in each of the plurality of sub-frames. The method further includes updating a channel estimation value based on reference signals included in a most recent sub-frame of the plurality of sub-frames. The method further includes calculating a log likelihood ratio (LLR) based on the accumulated data signals and the updated channel estimation value. Furthermore, the method includes decoding data based on the LLR.

Abstract: A wireless communication method using a plurality of antennas performed by a controller, the wireless communication method including obtaining a target transmission power level and beam forming information, determining at least one inactive antenna from among the plurality of antennas, based on the target transmission power level and the beam forming information, and controlling transmission signals provided to the plurality of antennas such that transmission via the at least one inactive antenna does not occur.

Abstract: Provided is a data decoding method of a wireless communication device. The method includes receiving a plurality of sub-frames. The method further includes accumulating data signals respectively included in each of the plurality of sub-frames. The method further includes updating a channel estimation value based on reference signals included in a most recent sub-frame of the plurality of sub-frames. The method further includes calculating a log likelihood ratio (LLR) based on the accumulated data signals and the updated channel estimation value. Furthermore, the method includes decoding data based on the LLR.

Abstract: An apparatus and a method for controlling power consumption of a terminal in a wireless communication system are provided. The method includes deactivating one or more of hardware components for signal reception in a transmission interval if there is no data to be received in the transmission interval, and receiving a control signal by activating all the components in a next transmission interval.

Abstract: A method of processing a plurality of component carriers (CCs) included in a signal received by a user equipment includes receiving a first CC and a second CC, in which the first and second CCs have different reception timings, front-processing the first and second CCs asynchronously, controlling a timing between the first and second CCs using an alignment buffer memory, and processing the timing-controlled first and second CCs synchronously. The plurality of CCs includes at least the first and second CCs.

Abstract: A wireless communication method including receiving, through a wireless channel, table indication information indicating one of a first Modulation and Coding Scheme (MCS) table supporting up to 64 Quadrature Amplitude Modulation (QAM) and second and third MCS tables supporting up to 256 QAM, the third MCS table including a same number of MCS indices as the second MCS table and including less MCS indices corresponding to 256 QAM than the second MCS table, and identifying one of the first to third MCS tables according to the received table indication information to recognize a demodulation scheme for data to be received through the wireless channel may be provided.

Abstract: Some example embodiments include methods of operating a wireless communication device supporting carrier aggregation, the methods include allocating a memory of a plurality of memories to each of a plurality of component carriers based on a memory allocation priority; determining a demodulation priority for each of the plurality of component carriers based on one of a size of each memory allocated to each of the plurality of component carriers, and the memory allocation priority; and demodulating signals received via the plurality of component carriers based on the demodulation priority.

Abstract: An apparatus and a method for controlling power consumption of a terminal in a wireless communication system are provided. The method includes deactivating one or more of hardware components for signal reception in a transmission interval if there is no data to be received in the transmission interval, and receiving a control signal by activating all the components in a next transmission interval.

Abstract: A semiconductor device comprises a semiconductor chip which includes at least one gate structure on a substrate, the gate structure including a first region, a second region different from the first region, and a third region between the first and the second region, a first redistribution layer on a top surface of the semiconductor chip, the first redistribution layer configured to electrically connect a first electrode pad of the semiconductor chip to a first solder ball and overlap the first region of the gate structure, a second redistribution layer on the top surface of the semiconductor chip, the second redistribution layer configured to electrically connect a second electrode pad of the semiconductor chip to a second solder ball and overlap the second region of the gate structure such that the third region is exposed, and an insulating layer on the first redistribution layer and the second redistribution layer.

Abstract: Provided are a wireless communication apparatus and a channel estimation methods of the wireless communication apparatus. The channel estimation methods includes receiving a first sub-frame and a second sub-frame, the first sub-frame including a plurality of first reference signals pre-coded based on a first pre-coding matrix and the second sub-frame including a plurality of second reference signals pre-coded based on a second pre-coding matrix; determining whether the first pre-coding matrix and the second pre-coding matrix are the same, based on a channel variation in the time domain; and performing, in response to determining that the first pre-coding matrix and the second pre-coding matrix are the same, channel estimation with respect to a resource element included in the second sub-frame based on at least of the plurality of first reference signals and at least one of the plurality of second reference signals.

Abstract: A chipset is provided. The chipset is configured to detect an interference characteristic of a neighbor cell corresponding to groups and perform an interference whitening operation based on the interference characteristic. The groups are generated by dividing a time interval occupied by a first reference signal region by dividing a frequency band occupied by the first reference signal region, or by dividing a time interval occupied by a second reference signal region. A frequency band occupied by the second reference signal region is wider than the frequency band occupied by the first reference signal region.

Abstract: A chipset including at least one processor is provided. The at least one processor of the chipset is configured to acquire an interference whitening (IW) and detection scheme and demodulate an interference signal based on the acquired IW and detection scheme, wherein the IW and detection scheme is determined based on an interference characteristic of the interference signal, and the interference characteristic is determined based on whether a region in which the interference signal is included collides with a reference signal region of a serving cell and whether the interference signal is a reference signal.

Abstract: A method and apparatus are provided for performing a channel decoding operation based on effective noise in a mobile communication system. The method includes detecting effective noise including additive noise that occurs in a channel environment between the signal receiving apparatus and a signal transmitting apparatus and channel estimation noise that occurs during a channel estimating operation the signal receiving apparatus; generating a log likelihood ratio (LLR) based on the detected effective noise; and performing channel decoding based on the generated LLR.

Abstract: A technique for avoiding reception performance deterioration caused by a tone interference that occurs at a position carrying a pilot signal in a wireless communication system is provided. A receiving end includes an operator for converting a time-axis signal into a frequency-axis signal, an extractor for generating channel values in positions carrying pilot signals among the frequency-axis signals, a compensator for compensating for a channel value of a position at which tone interference occurs by using at least one channel value of a position at which no tone interference occurs among the channel values.

Abstract: A method of processing a plurality of component carriers (CCs) included in a signal received by a user equipment includes receiving a first CC and a second CC, in which the first and second CCs have different reception timings, front-processing the first and second CCs asynchronously, controlling a timing between the first and second CCs using an alignment buffer memory, and processing the timing-controlled first and second CCs synchronously. The plurality of CCs includes at least the first and second CCs.