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Application of low-density check code in wireless data communication

A wireless data communication and low-density check code technology, which is applied in the application of multi-bit parity error detection coding, data representation error detection/correction, digital transmission system, etc., can solve the complex coding of low density check code In order to achieve the effect of reliable data transmission, taking into account cost and performance

Inactive Publication Date: 2011-05-11
启东金凤凰科技发展有限公司
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Problems solved by technology

[0006] The coding complexity of low density check code (LDPC code) is not big and has a very high error correction ability, and it has a linear relationship with the code length of LDPC code. Although the decoding algorithm of LDPC code has certain complexity, due to In general data transmission applications, data uplink and downlink are asymmetrical

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  • Application of low-density check code in wireless data communication
  • Application of low-density check code in wireless data communication
  • Application of low-density check code in wireless data communication

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Embodiment Construction

[0047] The application of the low density check code of the present invention in wireless data communication, it comprises the realization of LDPC coder, the realization of LDPC decoder and the test of LDPC encoding and decoding, the test of LDPC encoding and decoding comprises FPGA hardware error test, video Interface test and throughput test,

[0048] Implementation of LDPC encoder:

[0049] In the encoder design, a quasi-regular LDPC code encoding algorithm structure based on Q matrix is ​​adopted. The design of the quasi-regular LDPC encoder is as follows:

[0050] According to formula (1)

[0051] It can be seen that the encoding process should first calculate

[0052]

[0053] Then add up to get the value of all check digits, the above formula (1) can be calculated as follows:

[0054] (1) First buffer a frame of data and store it in RAM according to certain rules;

[0055] (2) According to The position of the inner element 1 selects the c...

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Abstract

The invention relates to application of a low-density check code in wireless data communication, which comprises implementation of an LDPC (Low Density Parity Code) coder, implantation of an LDPC decoder and LDPC coding and decoding test, wherein the LDPC coding and decoding test comprises an FPGA (Field Programmable Gate Array) hardware error code test, video interface test and throughput rate test. The coding and decoding test indicates that a wireless data transmitting mode adopting the LDPC coding can realize reliable data transmission under a more hostile environment and can give consideration to the cost and the property.

Description

technical field [0001] The invention relates to the application of low-density check codes in wireless data communication. Background technique [0002] Traditional data communication methods are mainly wired, such as the earliest industrial buses such as RS-232 and RS-485, and some high-speed industrial buses that appeared later. In order to solve the problems of communication speed and wiring, a more convenient wireless data transmission method has emerged. At present, the WLAN method based on the 802.11 protocol is commonly used. This method can effectively solve the multipath problem based on OFDM modulation at the physical layer. The error method is based on packet exchange based on data packets, and the error correction method is to use the method of sending errors and retransmitting. Speed ​​will be greatly affected. Most of the current data communication methods, whether wired or wireless, are based on this data error correction method. For example, the maximum t...

Claims

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Application Information

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IPC IPC(8): H03M13/11H04L1/00
Inventor 薛文
Owner 启东金凤凰科技发展有限公司
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