Sub block interleaving control method based on LTE (Long Term Evolution) Turbo decoding, device and equipment

Abstract

The invention discloses a sub block interleaving control method based on LTE (Long Term Evolution) Turbo decoding, a device and equipment, and belongs to the communication filed. The method comprises steps: according to the code length and preset parallelism of input data, the input data are blocked and sub blocks with a preset number are obtained; according to the storage address of each code element in the first sub block of the sub blocks with the preset number, an inner-block offset address after the code elements in the first sub block are interleaved is calculated; a block index after the code elements in the first sub block are interleaved is calculated; according to the block index after the code elements in the first sub block are interleaved, block indexes after the code elements in other sub blocks are interleaved are calculated; and the inner-block offset address after the code elements in the first sub block are interleaved and the block indexes after code elements in each sub block in the sub blocks with the preset number are interleaved are stored. Through calculating block indexes of code elements with the same offset addresses, parallel calculation of the interleaving address is realized, and calculation amount is reduced.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a sub-block interleaving control method, device and equipment based on LTE Turbo decoding. Background technique [0002] LTE (Long Term Evolution) is a 4G wireless broadband technology developed by the 3rd Generation Partnership Project (3GPP) project team. LTE is the next step (4G) in the development after the Global System for Mobile Communication (GSM, Global System for Mobile Communication) to the Universal Mobile Telecommunications System (UMTS, Universal Mobile Telecommunications System). LTE offers peak data transfer rates, lower latency, scalable bandwidth capacity and backward compatibility with existing GSM and UMTS technologies. From UMTS to LTE protocols, interleaving has also evolved from general "row write column read" to more regular quadratic polynomial permutation (Quadratic Polynomial Permutation, QPP) interleaving, which provides conditions for ...

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Problems solved by technology

[0005] The traditional interleaving calculation calculates the interleaving address in order, and needs to calculate the interleaving address of each symbol according to the QPP interleaving algorithm. When the code length is large, the calculation amount is large, and the delay in calculating the interleaving is also large, and the time is complicated. For the parallel processing method, in the storage process of the interleaving generation method based on UMTS Turbo, each interleaving address will occupy a storage unit, and the parallel processing and ping-pong operation will accumulate the amount of RAM, which will take up a large amount of memory. Storage space, that is, high space complexity

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