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Apparatus and method for coding/decoding block low density parity check code with variable block length

A technology of parity check and parity check matrix, applied in the field of mobile communication system

Active Publication Date: 2007-07-04
NOKIA TECHNOLOGLES OY
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Problems solved by technology

[0060] The biggest problem with the DLPC code with the parity check matrix of Fig. 7 is that if the length of the block is defined as N s , then generate N whose degree is always 1 in the factor graph of the block DLPC code s checkpoint

Method used

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  • Apparatus and method for coding/decoding block low density parity check code with variable block length
  • Apparatus and method for coding/decoding block low density parity check code with variable block length
  • Apparatus and method for coding/decoding block low density parity check code with variable block length

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Embodiment Construction

[0112] Several preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, detailed descriptions of known functions and configurations incorporated therein are omitted for brevity.

[0113] The present invention proposes an apparatus and method for encoding and decoding a block Low Density Parity Check (LDPC) code having a variable length (hereinafter referred to as "variable length block LDPC code"). That is to say, the present invention proposes that the length of the minimum cycle in the factor graph of encoding and decoding block LDPC codes is maximized, the coding complexity of block LDPC codes is minimized, and the degree distribution in the factor graph of block LDPC codes has 1 An optimal value of and an apparatus and method for a variable length block LDPC code supporting variable block lengths. Although not separately exemplified in the specification, the encoding and decod...

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Abstract

Disclosed is a device and procedure for coding a block low density parity check (LDPC) code having a variable length. The a device and procedure includes receiving an information word; and coding the information word into a block LDPC code according to a first parity check matrix or a second parity check matrix depending on a length to be applied when generating the information word into the block LDPC code.

Description

technical field [0001] The present invention generally relates to mobile communication systems, and more particularly to an apparatus and method for encoding / decoding block Low Density Parity Check (LDPC) codes. Background technique [0002] With the rapid development of mobile communication systems, it is necessary to develop technologies capable of transmitting large amounts of data approaching the capacity of wired networks even in a wireless environment. In order to meet the increasing demand for high-speed and high-capacity communication systems capable of processing and transmitting various data such as images and radio data on top of voice-oriented services, the transmission efficiency of the system is improved by using an appropriate channel coding scheme to Improving overall system performance is very important. However, due to the characteristics of the mobile communication system, errors inevitably occur during data transmission due to noise, interference, and fa...

Claims

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Application Information

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IPC IPC(8): H04L1/00
CPCH03M13/1102H04L1/0046H04L1/0057H04L1/0061
Inventor 庆奎范明世澔梁景喆梁贤九朴东植金宰烈朴圣恩崔承勋周判谕郑鸿实
Owner NOKIA TECHNOLOGLES OY
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