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Method for Turbo decoding in LTE (Long Term Evolution) and Turbo decoder

A decoder and decoding technology, applied in the field of turbo decoders

Inactive Publication Date: 2013-02-13
新奇点智能科技集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004]LTE channel coding adopts turbo code, in order to achieve 100Mbit / s transmission rate, it is required to optimize the decoding process of turbo decoder, otherwise, it cannot meet The downlink transmission rate of 100Mbit / s required by LTE

Method used

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  • Method for Turbo decoding in LTE (Long Term Evolution) and Turbo decoder
  • Method for Turbo decoding in LTE (Long Term Evolution) and Turbo decoder
  • Method for Turbo decoding in LTE (Long Term Evolution) and Turbo decoder

Examples

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example 1

[0081]After the first posterior probability decoding step and the second posterior probability decoding step have completed 8 iterations in total, output the corresponding deinterleaving result as the decoding of the current turbo decoder processing unit to the current data segment to be decoded code result.

[0082] Because based on the experiments and research of the technicians of the present invention, for the existing application, 8 iterations can usually meet the requirement of decoding accuracy. The advantage of this method is that there is no need to introduce verification data, which reduces the amount of calculations for judging the end. Of course, in practical applications, the number of iterations can be determined by those skilled in the art after experiments, and is not limited to 8 times. This example is only used to show that "fixed number of iterations" can be used as the judgment condition of the output.

example 2

[0084] When the de-interleaving result in the de-interleaving step meets the preset condition with the CRC check data, the corresponding de-interleaving result is output as the decoding result of the current turbo decoder processing unit for the current data segment to be decoded. This method can better control the decoding accuracy, but due to the need to introduce CRC check data, it increases the computational complexity to a certain extent.

[0085] For example, in the Turbo code, there is a polynomial with CRC check. If the polynomial corresponding to the deinterleaving result of the deinterleaving step matches the polynomial with the CRC check in the Turbo code, the decision output can be made.

[0086] above figure 2 In the first posterior probability decoding step and the second posterior probability decoding step, the same posterior probability algorithm can be used, and the present invention preferably adopts the max-log-map algorithm, which is relatively simplified ...

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Abstract

The invention provides a method for Turbo decoding in the LTE (Long Term Evolution), which comprises the following steps: receiving data to be decoded; decomposing the data to be decoded into N blocks on the basis of the data volume of the data to be decoded according to a first preset rule; allocating corresponding Turbo decoder processing units for various blocks; respectively carrying out decoding processing on N data blocks to be decoded through corresponding Turbo decoder processing units; when one Turbo decoder processing unit processes the allocated data block to be decoded, decomposing the data blocks to be decoded into M segments on the basis of the data volume of the data blocks to be decoded according to a second preset rule; sequentially carrying out serial decoding processing on M data segments to be decoded by using the Turbo decoder processing units so as to finish decoding the whole data block to be decoded; and outputting decoding results obtained from various Turbo decoder processing units. The invention can reach the downlink 100Mbit / s meeting the LTE requirement and can reduce the data storage space and the requirement on the processing performance of the chip.

Description

technical field [0001] The invention relates to the technical field of LTE communication, in particular to a method for performing Turbo decoding under the technical condition of LTE communication and a Turbo decoder. Background technique [0002] LTE (long term evolution, long-term evolution) is an evolution technology of the third generation mobile communication, which started at the 3GPP conference in Toronto in 2004. LTE is not the 4G technology that people generally misunderstand, but a transition between 3G and 4G technology. It is the global standard of 3.9G. It improves and enhances the air access technology of 3G. The only standard. [0003] The main performance goals of the 3GPP LTE project include: providing a peak rate of downlink 100Mbps and uplink 50Mbps in a 20MHz spectrum bandwidth; improving the performance of cell edge users; increasing cell capacity; reducing system delay, and the one-way transmission delay within the user plane is less than 5ms , the tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/27H04L1/00
Inventor 张辉王西强宋磊王飒爽
Owner 新奇点智能科技集团有限公司