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Rate de-matching method

A technology for de-rate matching and de-duplication, which is applied in digital transmission systems, electrical components, and error prevention, etc. It can solve problems such as large storage space, cumbersome implementation process of de-rate matching methods, and the inability to further reduce the processing circuit area.

Active Publication Date: 2009-03-18
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology

[0027] The implementation process of the existing rate matching method is cumbersome. It is necessary to calculate the position of the dropped dummy bits according to the rate matching method, and then insert the dummy bits into the received data. This requires a large amount of data movement, so a large The storage space and long processing time prevent the processing circuit area from being further reduced, and at the same time consume a lot of power

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Embodiment Construction

[0062] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0063] see image 3 , a solution rate matching method for Turbo encoding, comprising the following steps:

[0064] 101) According to the size of the transmission block and the mode of code block segmentation, the size of each sub-block is obtained, and the number F of virtual bits added in the code block segmentation is calculated according to the following formula:

[0065] F=C + ·K + +C - ·K - -B'

[0066] where C + and C - Indicates the length of the code block, K + and K - Respectively represent the division into C + and C - The number of code blocks, B' represents the total length of the code block after adding check bits;

[0067] 102) According to the interleaver formula, calculate the address of the sub-block interleaving and the number N of dummy bits added in the sub-block interleaving according to the following for...

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Abstract

The invention provides a method for solving rate matching, which comprises the following steps: without inserting dummy bits into receiving data, which are added during the dividing of code blocks and the interweaving of sub-blocks before the de-repeating operation or the de-drilling operation, directly carrying out the de-repeating operation or the de-drilling operation to the receiving data, then carrying out the de-bit-collecting and the de-interweaving, wherein for the rate de-matching of Turbo codes, the process of inserting the dummy bits into the receiving data, which are added during the dividing of the code blocks and the interweaving of the sub-blocks, is concealed, and the de-repeating operation or the de-drilling operation can be carried out only through calculating the length of non-dummy bits in the former Ncb of data and the former k0 of data in the data after the collection of bits in the rate matching, and for the rate de-matching of convolution codes, the method is more simplified, namely the de-repeating operation or the de-drilling operation can be directly carried out to the receiving date according to the size of transmission blocks. Compared with the prior art, the method simplifies the de-rate matching process, reduces the data transmitting process, greatly reduces the processing time, reduces the data quantity which needs to be processed and improves the processing efficiency.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a method for de-rate matching in the third-generation mobile communication long-term evolution system (hereinafter referred to as 3G LTE). Background technique [0002] In the uplink of the mobile communication system, the encoding and multiplexing processing of the transmission channel mainly includes steps such as CRC addition (Cyclic Redundancy Code, cyclic redundancy check code), channel coding, rate matching, interleaving, and transmission channel multiplexing. Can refer to the stipulation that the coded multiplexing processing of transmission channel is carried out in the international standard agreement 3GPP 36.212 of 3G LTE, the part relevant to the present invention is briefly described here, the general multiplexing processing process of transmission channel coding generally comprises the following steps: [0003] Step a: Append CRC to the transport...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L12/56
Inventor 王俊沈静王茜竹申敏
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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