Abstract: A low density parity check (LDPC) coding method, and more particularly, a method of executing LDPC coding using a parity check matrix is disclosed. The present invention comprises providing an information bit stream for channel encoding, and encoding the information bit stream by using a first parity check matrix including at least one row generated by combining at least two rows of a second parity check matrix.

Abstract: The present application discloses a method for mapping a subband/miniband in a wireless communication system. Particularly, the method comprises the steps of: dividing a system frequency band into a plurality of physical resource units (PRU); mapping the plurality of physical resource units to physical resource units of a subband (PRUSB) in accordance with a 1st rule; and mapping the plurality of physical resource units to physical resource units of a miniband (PRUMB) in accordance with a 2nd rule, wherein said 1st rule and said 2nd rule contain factors for limiting the minimum value of the gap between subbands allocated to the system frequency band.

Abstract: The method includes generating coded bits by encoding information bits, dividing the coded bits into a first bit-stream and a second bit-stream, generating a first data symbol by performing anti-gray mapping on the first bit-stream, generating a second data symbol by performing gray mapping on the second bit-stream, and transmitting the first data symbol and the second data symbol. Reliability of bits can be improved in the first bit-stream and the second bit-stream by using different mapping schemes.

Abstract: Disclosed are an apparatus and a method for transmitting data using a CTC (Convolutional Turbo Code) encoder in a mobile communication system.

Abstract: A method of performing interleaving and a data transmission apparatus are disclosed, in which interleaving is performed for input data streams using bit reverse ordering (BRO) operation. A method of performing interleaving for input data streams comprises writing respective bits of the input data stream in a row direction of a memory matrix in accordance with the input order, performing row permutation for index of each row of the memory matrix using an R-bit (R is an integer) bit reverse ordering (BRO) operation, performing pruning for a row which satisfies a given condition, performing column permutation using BRO operation for index of each column of the memory matrix, and reading to output each bit in a column direction of the memory matrix where the column permutation has been performed.

Abstract: A method of receiving control information in a wireless communication system includes receiving position information for searching at least one downlink control channel, a downlink control channel carrying control information of at least one user equipment, receiving multiplexed downlink control channel in which a plurality of downlink control channels are sequentially multiplexed and sequentially searching the downlink control channel on the multiplexed downlink control channel according to the position information. The number of detection attempts to detect its own control information can be reduced.

Abstract: A method and apparatus of transmitting a midamble in a wireless communication system is provided. A base station (BS) generates a midamble sequence for each of a plurality of antennas, and transmits the midamble sequence to a user equipment for each antenna. A location of a subcarrier to which each midamble sequence is mapped is determined based on a frequency reuse factor (FRF).

Abstract: A method of estimating a signal-to-noise ratio by considering user mobility, a method of adjusting feedback information transmission, an adaptive modulation and coding method using the same, and a transceiver thereof are disclosed. The present invention includes measuring a first channel parameter and a second channel parameter using first and second symbols sequentially received, respectively, estimating a channel quality considering a time delay between measurements of the first and second channel parameters using the first and second channel parameters, and transmitting information for the estimated channel quality if a variation of the first and second channel parameters is equal to or greater than a prescribed threshold. Accordingly, the present invention reduces performance degradation and feedback overhead caused by a time delay in channel quality estimation.

Abstract: A method for receiving control information for data reception at a specific user equipment in a communication system in which at least one data transmission mode is used to transmit data of the at least one UE is disclosed. The method receives the control information including a first field and a second field, in which the first field indicates a data transmission mode of the specific user equipment (UE) and the second field indicates a resource block via which the data is transmitted, and receives the data by decoding the control information. As a result, a method for constructing control information required for receiving control data of a localized-mode UE and a distributed-mode UE can be recognized.

Abstract: A method for mapping subband/miniband in a wireless communication system and apparatus therefore are disclosed. The present invention includes dividing the system frequency band into a plurality of physical resource units (PRUs) and mapping a plurality of the physical resource units to a subband physical resource unit (PRUSB) and a miniband physical resource unit (PRUMB), wherein the mapping is based on an interval between contiguous resource units which includes a predetermined number of contiguous PRUs and another interval greater than the former interval and wherein the interval between the contiguous resource units is a roundup value of a value resulting from dividing a maximum number of the contiguous resource units by the number of the contiguous resource units to allocate to the minibands.

Abstract: Particular codebook entries used for a MIMO system of a lower dimension (i.e., having a relatively low number of antennas) can be used to generate a codebook for a MIMO system of a higher dimension (i.e., having a relatively high number of antennas). The entries in rank 1 of the codebook related to the MIMO system having four transmit antennas are used to newly construct entries for rank 1 through rank 8 of two base matrices for a MIMO base codebook related to eight transmit antennas.

Abstract: There are provided a waste collection system and a method for opening/closing a waste receiving device in the waste collecting system. The waste collection system comprises: a cover formed to be opened/closed on a waste receiving device; a damper formed to be opened/closed under the waste receiving device through the cover and an interlocker; and a housing. The waste collection system further comprises: a user recognition system positioned at the front of the housing; and a driving unit for driving the opening/closing of the damper, wherein the driving unit is on/off based on the results of the user recognition system.

Abstract: There is provided an air intake for a vacuum-conveyance waste collection system, to form a high-speed air flow by allowing air to enter a conveying line through which waste being put into a waste receiving device is conveyed to a central waste collection station.

Abstract: There is provided a waste discharge valve for a vacuum-conveyance waste collection system in which waste put in a waste receiving device is automatically conveyed to a central waste collection station through a conveying line.

Abstract: An apparatus and method for transmitting a signal using a bit grouping method in a wireless communication system is disclosed. Interleaved subblocks are maintained, and output bit sequences are modulated in due order after bit grouping and bit selection. The bit grouping method is advantageous in that bit reliability is uniformly distributed.

Abstract: There is provided a capacity-limited waste receiving device for a waste collection system, in which a waste receiving device in a vacuum-conveyance waste collection system (which conveys waste along a line) automatically conveying the waste to a central collecting station is improved to be more efficient.

Abstract: An apparatus for encoding an information bit stream using turbo code is provided. The apparatus includes a temporary bit generator for creating a temporary bit stream, an interleaver for independently receiving the information bit stream and the temporary bit stream, a first constituent encoder for independently receiving the information bit stream and the temporary bit stream and generating a first parity bit stream and a second constituent encoder for receiving an output of the interleaver and generating a second parity bit stream. Performance of a turbo code can be enhanced without changing a code rate by making a decoded bit stream longer.

Abstract: A method of generating a sub-packet in consideration of an offset is disclosed. A method of generating a sub-packet in consideration of an offset, for re-transmission of a packet from systematic bits and parity bits stored in a circular buffer includes turbo-coding an input bitstream at a predetermined code rate and generating and storing the systematic bits and the parity bits in the circular buffer, and deciding a starting position of the sub-packet in the circular buffer in consideration of the offset for puncturing at least a portion of the systematic bits of the circular buffer. Accordingly, it is possible to efficiently decide the starting position of the sub-packet to be transmitted adaptively with respect to a variable packet length, improving a coding gain, reducing complexity and reducing a calculation amount.

Abstract: A data rate matching method is disclosed. More particularly, a rate matching method using at least two parameters is disclosed. The rate matching method includes selecting bits from an input bitstream using a primary-indication parameter for selecting at least one bit and a secondary indication parameter for canceling the selection using the primary indication parameter or additionally selecting unselected bits, and processing the selected bits according to a rate matching mode so as to generate an output bitstream. By using the rate matching method, highspeed processing is realized by a simple calculation and the locations of target bits can be efficiently decided using at least two indication parameters. Accordingly, it is possible to reduce a calculation amount or improve performance.

Abstract: A method and an apparatus of mapping a resource unit is provided. Physical resource units (PRUs) are divided into a plurality of PRU sets. The PRUs are mapped to a subband PRU or a miniband PRU in a granularity of the PRU set. The mapping is based on the greatest common divisor of the maximum number of PRU sets. The resource unit can be effectively mapped while maximizing a frequency diversity gain of a subband PRU and a miniband PRU.