Method for Turbo coding of rate match/de-rate match in LTE (long term evolution) system

A technology of rate matching and coding rate, applied in the field of Turbo coding rate matching/decoding rate matching of LTE system, can solve the problem of low processing speed and achieve the effect of speeding up

Inactive Publication Date: 2012-05-23
POTEVIO INFORMATION TECH CO LTD
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Problems solved by technology

The processing speed of the above rate matching is low due to the need to repeatedly read the data in the bitstream in memory

Method used

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  • Method for Turbo coding of rate match/de-rate match in LTE (long term evolution) system
  • Method for Turbo coding of rate match/de-rate match in LTE (long term evolution) system
  • Method for Turbo coding of rate match/de-rate match in LTE (long term evolution) system

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Embodiment Construction

[0042] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0043] In the embodiment of the present invention, the system bit stream, the first parity bit stream (P1) and the second parity bit stream (P2) are processed in parallel at the same time, and the data read and write operations of four consecutive words are constructed to be suitable for mainstream processors. Realize the data access structure of packed data operations, and reduce the number of reads and writes to memory. The processing method is simple, the loop structure is clear, and there is no operation that interrupts the pipeline such as judgment jumps. The processor can fetch data and calculate faster, and directly map the interleaved data of the sub-blocks to the output position, thereby speeding up the rate matching. speed. ...

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Abstract

The invention provides a method for Turbo coding of rate match / de-rate match in an LTE (long term evolution) system. The method comprises the following steps of: confirming an interweaving mode according to the date length K of a code block; obtaining a system matrix according to a system bit stream, wherein a first check bit stream P1 and a second check bit stream P2 are alternately stored to obtain a check matrix, every eight lines from a first line of the system matrix is taken as a subsystem matrix, and every eight lines from a first line of the check matrix is taken as a subsystem check matrix; confirming a system matrix address and a check matrix address; putting the system bit stream in the address after the data is packed, and putting the check bit stream into the check matrix address after the data is packed; and outputting the data in the system matrix address and the check matrix address according to lines, so that the bit stream after the rate match / de-rate match can be obtained. After the method is used, the speed of rate match / de-rate match can be accelerated.

Description

technical field [0001] The present invention relates to the technical field of communication, and more specifically, to a method for rate matching / de-rate matching of Turbo encoding in an LTE system. Background technique [0002] Long-term evolution (LTE) is the long-term evolution of 3G communication technology, which provides higher transmission rate for future wireless communication systems, and its high-speed code rate brings a heavy burden to the baseband processing of base stations and terminals. For the baseband processing in the LTE technology, how to speed up bit-level data processing speed, especially the rate matching processing speed of the transmission channel is one of the bottlenecks of the entire baseband processing. [0003] The transmission channel rate matching process of the existing Turbo coding is as attached figure 1 shown. The original bit stream at the sender is turbo-encoded to obtain the system bit stream first parity bit stream Second parity...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06
Inventor 周晟刘富芝
Owner POTEVIO INFORMATION TECH CO LTD
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