Patent application number | Description | Published |
20080246639 | Decoding Apparatus and Communications Apparatus - A decoding apparatus includes a row processing unit | 10-09-2008 |
20090031186 | Error correction coding apparatus - An error correction coding apparatus is disposed to generate a low-density parity-check code | 01-29-2009 |
20090063930 | CHECK MATRIX GENERATING METHOD, ENCODING METHOD, DECODING METHOD, COMMUNICATION DEVICE, ENCODER, AND DECODER - A regular quasi-cyclic matrix is generated with cyclic permutation matrices and specific regularity given to the cyclic permutation matrices. A mask matrix for making the regular quasi-cyclic matrix into an irregular quasi-cyclic matrix is generated. An irregular masked quasi-cyclic matrix is generated by converting a specific cyclic permutation matrix in the regular quasi-cyclic matrix into a zero-matrix using a mask matrix supporting a specific encoding rate. An irregular parity check matrix with an LDGM structure is generated with a masked quasi-cyclic matrix and a matrix in which the cyclic permutation matrices are arranged in a staircase manner. | 03-05-2009 |
20090132887 | Communication Apparatus and Decoding Method - A communication apparatus includes a storage unit, a row processing unit, and a column processing unit. The row processing unit repeatedly performs row processing to calculate a column-processing LLR for each column and each row in a check matrix. The column processing unit calculates a row-processing LLR for each column and each row of the check matrix, and repeatedly performs column processing to store in the storage unit the minimum value k of absolute values of the row-processing LLR. The row processing unit and the column processing unit alternately performs their processing. The row processing unit performs calculation using an approximate minimum value while the column processing unit cyclically updates the minimum k value of each row. | 05-21-2009 |
20090138785 | COMMUNICATION DEVICE, DECODING DEVICE, INFORMATION TRANSMISSION METHOD, AND DECODING METHOD - A communication device that transmits and receives LDPC-encoded information by using MIMO technology. The communication device includes a transmission sorting unit that sorts LDPC-encoded bits constituting the LDPC-encoded information in a descending order of column degree of a check matrix used for generating the LDPC-encoded bits; and a signal transmitting unit that transmits the LDPC-encoded bits sorted by the transmission sorting unit by allocating the LDPC-encoded bits from a transmission line having a lower noise level in sorted order. | 05-28-2009 |
20090164864 | INSPECTION MATRIX GENERATION METHOD, ENCODING METHOD, COMMUNICATION DEVICE, COMMUNICATION SYSTEM, AND ENCODER - A regular qc matrix is generated in which cyclic permutation matrices with specific regularity are arranged in row and column directions. A mask matrix supporting multiple encoding rates is generated for making the regular qc matrix into irregular. A specific cyclic permutation matrix in the regular qc matrix is converted into a zero-matrix using a mask matrix corresponding to a specific encoding rate to generate an irregular masking qc matrix. An irregular parity check matrix with a LDGM structure is generated, in which the masking qc matrix and a matrix in which the cyclic permutation matrices are arranged in a staircase manner are arranged in a predetermined location. | 06-25-2009 |
20090164866 | INTERLEAVING METHOD AND COMMUNICATION APPARATUS - An interleaving method according to the present invention is an interleaving method implemented when interleaving is performed on an encoded sequence after being error-correction encoded in a communication device on a data transmission side. This method is implemented in such a manner that an inter-carrier interleaver ( | 06-25-2009 |
20090265600 | TEST MATRIX GENERATING METHOD, ENCODING METHOD, DECODING METHOD, COMMUNICATION APPARATUS, COMMUNICATION SYSTEM, ENCODER AND DECODER - A regular quasi-cyclic matrix is prepared, a conditional expression for assuring a predetermined minimum loop in a parity check matrix is derived, and a mask matrix for converting a specific cyclic permutation matrix into a zero-matrix based on the conditional expression and a predetermined weight distribution is generated. The specific cyclic permutation matrix is converted into the zero-matrix to generate an irregular masking quasi-cyclic matrix. An irregular parity check matrix in which the masking quasi-cyclic matrix and a matrix in which the cyclic permutation matrices are arranged in a staircase manner are arranged in a predetermined location. | 10-22-2009 |
20100058140 | CHECK-MATRIX GENERATING METHOD, ENCODING METHOD, COMMUNICATION APPARATUS, COMMUNICATION SYSTEM, AND ENCODER - A regular quasi-cyclic matrix is generated in which specific regularity is given to cyclic permutation matrices. A mask matrix capable of supporting a plurality of encoding rates is generated. A specific cyclic permutation matrix in the regular quasi-cyclic matrix is converted into a zero-matrix using a mask matrix corresponding to a specific encoding rate to generate an irregular masking quasi-cyclic matrix. An irregular parity check matrix with an LDGM structure is generated in which the masking quasi-cyclic matrix and a matrix in which the cyclic permutation matrices are arranged in a staircase manner are arranged in a predetermined location. | 03-04-2010 |
20100070820 | CODING APPARATUS, CODING METHOD, CODING AND DECODING APPARATUS, AND COMMUNICATION APPARATUS - When carrying out puncturing of some redundant bits in an LDPC code having a check matrix of QC structure and LDGM structure, a puncture rule for preventing redundant bits which are chained to one another from being punctured is set up, and some redundant bits out of an LDPC-coded signal are punctured out of the LDPC-coded signal according to the puncture rule. As a result, redundant bits which are chained to one another can be left. | 03-18-2010 |
20100211846 | CHECK MATRIX GENERATING DEVICE, CHECK MATRIX GENERATING METHOD, ENCODER, TRANSMITTER, DECODER, AND RECEIVER - When arranging J cyclic permutation matrices I(p | 08-19-2010 |
20100272202 | DATA TRANSMISSION DEVICE, DATA RECEPTION DEVICE, AND WIRELESS COMMUNICATIONS SYSTEM - When an error correction decoding unit | 10-28-2010 |
20100275104 | ERROR CORRECTING DEVICE AND ERROR CORRECTING METHOD - An error correcting device in an optical communication system that transmits a transmission frame formed by adding an overhead and an error correction code to information data uses a concatenated code or an iterated code of at least two error correction codes as an outer code and an error correction code for soft-decision decoding as an inner code. | 10-28-2010 |
20100293432 | ERROR-CORRECTION CODING METHOD, ERROR-CORRECTION DECODING METHOD, ERROR-CORRECTION CODING APPARATUS, AND ERROR-CORRECTION DECODING APPARATUS - An error-correction coding method that includes outer coding of performing a coding process for an outer code; and inner coding of performing a coding process for an inner code that has an error correction capability adjusted based on an error correction capability of the outer code. | 11-18-2010 |
20100325514 | DECODING METHOD AND DECODING DEVICE - In row calculation, a value which is obtained by subtracting an offset according to a minimum of the absolute values of column LLRs from the minimum of the absolute values of the column LLRs is set as a row LLR corresponding to a column of the column LLRs. | 12-23-2010 |
20110154151 | CHECK MATRIX CREATION DEVICE, CHECK MATRIX CREATION METHOD, CHECK MATRIX CREATION PROGRAM, TRANSMITTER, RECEIVER, AND COMMUNICATION SYSTEM - A check matrix creation device includes a circulant permutation matrix setting unit | 06-23-2011 |
20110173511 | METHOD AND DEVICE FOR ENCODING OF ERROR CORRECTING CODES, AND METHOD AND DEVICE FOR DECODING OF ERROR CORRECTING CODES - Provided is an error correction encoding device including: an outer encoding circuit ( | 07-14-2011 |
20120069594 | INTERNAL LIGHTING DISPLAY DEVICE AND DISPLAY PANEL THEREOF - An interior lighting display device and a display panel thereof capable of effectively preventing a dark area from being formed in the display panel. A film or sheet that reflects light is disposed on a back surface and a side surface of a display panel of an interior lighting display device. For example, the film or sheet is disposed on a back surface and a side surface of a region that is a colored area having low transmittance of the display panel, and an area in which a light source is not present behind the display panel. In addition, a light reflective body is placed in an area in which the light source is not present within the interior lighting display device. | 03-22-2012 |
20120128368 | DIFFERENTIAL CODE OPTICAL TRANSMISSION AND RECEPTION DEVICE - A differential code optical transmission and reception device including: a digital signal processing optical transceiver that converts information data into an optical signal and transmits it to a communication channel, a reception front end part that receives the optical signal from the communication channel, an O/E conversion part that converts the optical signal received from the communication channel into an electrical signal, a skew correction part that regulates or correct a skew between lanes contained in the electrical signal, a differential decoder that decodes a differential code of the skew corrected electrical signal, and a lane exchange/rotation part that rearranges the electrical signal having passed through the differential decoder into a lane state thereof at the time of transmission in cases where lane exchange has occurred in the communication channel. | 05-24-2012 |
20120210189 | ERROR CORRECTION ENCODING METHOD AND DEVICE, AND COMMUNICATION SYSTEM USING THE SAME - An error correction method and device and a communication system using them, including an LDPC code generation method capable of adjusting an encoding rate of an LDPC code in a variable manner while leaving the length of the code constant by use of an efficient encoding method or mechanism supporting a variable encoding rate, so that the encoding rate of the LDPC code can be adjusted without changing the code length. An error correction method includes a row dividing to divide each of a part or all of rows into two or more rows based on one parity check matrix, and a code construction to construct a plurality of LDPC codes with arbitrary code rates, respectively. | 08-16-2012 |
20130311840 | METHOD AND DEVICE FOR ESTIMATING INPUT BIT ERROR RATIO - An input bit error ratio estimating method executed by a communication control unit includes a computing, a condition determining, a first input BER estimating, a second input BER estimating, a third input BER estimating, and an input BER estimation result outputting. In the condition determining, the communication control unit determines which of a plurality of conditions set in advance to be narrowed down to one has been established, based on a post-internal decoding residual error detection ratio. Based on the condition that is determined in the condition determining as one that has been established, the communication control unit selects one out of a plurality of processing procedures for estimating the input BER, namely, selects one of the first input BER estimating to the third input BER estimating and executes the selected processing. | 11-21-2013 |
20130311847 | ERROR CORRECTION CODING DEVICE, ERROR CORRECTION DECODING DEVICE AND METHOD THEREFOR - Provided is an error correction encoder that performs coding on both a transmission area and a redundancy area of the transmission frame by using a product code, and when excess or deficiency is arisen with respect to allocation of an information sequence area and/or a parity sequence area in a product code frame generated by the coding using the product code, non-uniformly allocate the information sequence area to the parity sequence area, and/or non-uniformly allocate the parity sequence area to the information sequence area, where each of the non-uniform allocations is performed in accordance with the arisen excess or deficiency. | 11-21-2013 |