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De-interleaving method and device for de-rate matching

A technology for de-rate matching and de-interleaving, applied in de-interleaving of de-rate matching, third-generation mobile communication LTE de-rate matching, to achieve the effect of cost saving

Active Publication Date: 2016-06-22
南通东湖国际商务服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0014] The object of the present invention is to provide a de-interleaving method and device for de-rate matching, which is used to solve the general de-interleaving problem of Turbo codes and convolutional codes

Method used

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  • De-interleaving method and device for de-rate matching

Examples

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Embodiment 1

[0071] Assuming that in a UE system, the deinterleaving process of the PDCCH channel is completed, the implementation steps are as follows:

[0072] When there is already prepared code block data in the front-level FIFO, start to read the packet header data, and analyze the relevant parameters, including the size of the code block, encoding format indication information, etc., and calculate the interleaving matrix according to the analyzed parameters. The number of rows R and the number of dummy elements N D And so on a series of parameters.

[0073] Read data from the front-end three-way buffer FIFO in units of columns, and define variable C cnt and R cnt , each read a data R cnt Add 1 to the value, every time a column of R is read cnt The value returns to 0, every time a column C is read cnt value plus 1, passed to C cnt The order of the binary numbers is reversed and the lowest bit is reversed to get the corresponding C D , when the column number C D less than the n...

Embodiment 2

[0077] Assuming that in a UE system, the deinterleaving process of the PDSCH channel is completed, the implementation steps are as follows:

[0078] When there is already prepared code block data in the front-level FIFO, start to read the packet header data, and analyze the relevant parameters, including the size of the code block, encoding format indication information, etc., and calculate the interleaving matrix according to the analyzed parameters. The number of rows R and the number of dummy elements N D And so on a series of parameters.

[0079] Read data from the front-end three-way buffer FIFO in units of columns, and define variable C cnt and R cnt , each read a data R cnt Add 1 to the value, every time a column of R is read cnt The value returns to 0, every time a column C is read cnt Add 1 to the value, for the system information and the first verification information through the C cnt The order of the binary numbers is reversed to get the corresponding C D , ...

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Abstract

Disclosed is a de-interleaving method for rate de-matching, comprising: A, a data buffer FIFO buffering code block data; B, a code block parameter parsing unit reading and parsing packet header data of the code block data, and obtaining a code block parameter; C, a data storage address calculating unit calculating, according to the code block parameter, a storage address of symbol data output by the data buffer FIFO; and D, a symbol data storage RAM storing the symbol data in a corresponding position according to the storage address of the symbol data. Correspondingly disclosed is a de-interleaving system for rate de-matching. The present invention obtains a code block parameter indication signal of the code block data by parsing the packet header data of the interleaved code block data, and implements common de-interleaving of a Turbo code and a convolutional code rapidly and simply according to the features of the Turbo code and convolutional code interleaver matrixes, thereby saving consumption of system logical resources and RAM resources.

Description

technical field [0001] The present invention relates to the third-generation mobile communication LTE (Long Term Evolution, Long Term Evolution system) de-rate matching technology in the communication field, in particular to a de-interleaving method and device for de-rate matching. Background technique [0002] In the downlink of mobile communication, the receiving end needs to de-rate-match the received data, and de-interleaving can be regarded as a sub-process in the de-rate-matching process. In the current LTE system, the de-rate-matching process The de-interleaving of TLS mainly includes the processing of Turbo coding and convolutional codes. The de-interleaving process of these two coding methods is completely the same in thought, and the only difference lies in the complexity of the interleaving form and processing process. [0003] The interleaving process of Turbo coding is as follows: [0004] Step 1, specify a matrix, and make the number of columns of this matrix ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/0052H04L1/0057H04L1/0067H04L1/0071H04L1/0075
Inventor 刘伟韩茜
Owner 南通东湖国际商务服务有限公司
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