Abstract:
The present invention relates to a method for manufacturing large lighting which uses a power LED, such as for large LED lighting for street lamps, which incorporates a heat dissipation device that has the ability to dissipate heat with natural convection to maintain ambient temperature. The disclosed method is novel applied technology for producing a large LED lighting, such as for street lamps, which has a power LED device with a unique, rear heat dissipation capability. In addition to maximum thermal efficiency by heat dissipation, the present LED lighting system also increases luminous efficiency by providing high light emission with only a small quantity of LED power.,
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 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, high¬ speed 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 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:
An encoding and decoding method and apparatus.is disclosed. The method and apparatus improves encoding and decoding performance without using a large memory capacity and also reduces the complexity of hardware for implementation. According to the method, an encoded signal is received from a transmitting side, and the received signal is decoded using the parity check matrix. The parity check matrix includes layers where nonzero elements of a specific number of layers do not overlap in column direction.
Abstract:
An encoding and decoding method and apparatus.is disclosed. The method and apparatus improves encoding and decoding performance without using a large memory capacity and also reduces the complexity of hardware for implementation. According to the method, an encoded signal is received from a transmitting side, and the received signal is decoded using the parity check matrix. The parity check matrix includes layers where nonzero elements of a specific number of layers do not overlap in column direction.
Abstract:
A method and apparatus of transmitting control information in a wireless communication system is provided. A sequence corresponding to control information from a sequence set is determined. A reference modulation symbol set corresponding to a mini unit by modulating the sequence is generated. At least one reordered modulation symbol set is generated by reordering and repeating the reference modulation symbol set. The at least one reordered modulation symbol set is reordered in a unit of a subgroup. The reference modulation symbol set and the at least one reordered modulation symbol set are mapped to the plurality of mini units in the resource unit respectively.
Abstract:
A method of transmitting a control signal in a wireless communication system includes receiving data or a control signal, and transmitting a feedback signal through a control channel in response to the data or the control signal, wherein the control channel comprises a plurality of mini-tiles in a plurality of tiles, each of which consists of at least one orthogonal frequency division multiplexing (OFDM) symbol in a time domain and at least one subcarrier in a frequency domain, and if the plurality of tiles have the same pilot pattern, the plurality of mini-tiles are cyclically selected from the plurality of tiles, and if the plurality of tiles have cyclically-arranged pilot patterns, the plurality of mini-tiles are selected at the same position from the plurality of tiles.
Abstract:
A method for interleaving continuous length sequence is disclosed. The interleaving method selects a basic interleaver (S601 ) having a proper length from among the basic interleaver set, which is predetermined to have the length represented by a multiple of the ARP fluctuation vector period. The interleaving method performs the dummy insertion (S602) and the pruning process to have the length acting as the basic-interleaver length, so that it can provide the ARP interleaver (S603) having a continuous length.
Abstract:
The present invention relates to a method and a transmitter for matching a size of codeword encoded by low density parity check (LDPC) code to a size of a transmission channel and in a mobile communication system. A method of adjusting a codeword size in a communication system supporting an LDPC coding scheme, comprises steps of encoding source data by using a parity check matrix, and adjusting a size of the encoded codeword to be matched to a size of a transmission channel which is determined in accordance with a capacity of the transmission channel, the size of the encoded codeword being adjusted using information associated with column weights of the parity check matrix.