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Sliding window classification method and device in Turbo decoding

A sliding window and decoding technology, which is applied in the field of wireless communication, can solve problems such as time extension and output discontinuity, and achieve the effect of improving throughput and reducing decoding delay

Active Publication Date: 2015-07-22
BEIJING SMART LOGIC TECH CO LTD
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Problems solved by technology

[0026] The present invention aims to reduce the problems of time extension and output discontinuity in the Turbo decoding process

Method used

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  • Sliding window classification method and device in Turbo decoding
  • Sliding window classification method and device in Turbo decoding
  • Sliding window classification method and device in Turbo decoding

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Embodiment Construction

[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0046] Figure 4 It is a brief flow chart of the method for sliding-window division of Turbo decoding code blocks in the present invention. Such as Figure 4 As shown, the method includes:

[0047] Step S1. Determine the size of the Turbo decoding code block.

[0048] Step S2, according to the allowable deviation between the size of the Turbo decoding code block and the size of the sliding window, determine the size and number of sliding windows required for processing the decoding cod...

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Abstract

The embodiment of the invention discloses a sliding window classification method and device in Turbo decoding. The method includes the steps of firstly, determining the sizes of Turbo decoding blocks; secondly, determining the size of sliding windows of the first classification according to the sizes of the Turbo decoding blocks; thirdly, determining the sizes and the corresponding numbers of the sliding windows of the first classification, sliding windows of the second classification and sliding windows of the third classification according to the size of the sliding windows of the first classification and allowable deviation between lengths of the sliding windows. The sizes and the numbers of the sliding windows can be set according to the lengths of the decoding blocks and the allowable deviation between the lengths of the sliding windows, and the aims of saving hardware resources, shortening decoding time delay and increasing the decoding throughput rate are achieved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a sliding window division method and device in turbo decoding. Background technique [0002] Turbo decoders are widely used in many wireless communication devices. With the development of wireless communication technology and the continuous improvement of data transmission rates, the requirements for real-time decoding performance of Turbo decoders are also getting higher and higher, which requires constant Reduce the decoding delay and improve the throughput of Turbo decoding. [0003] The turbo decoder calculates the data with a frame length of N in the order of branch transfer metric, forward state metric, backward state metric, and logarithmic likelihood ratio. [0004] figure 1 Shows the decoding order of the Log-MAP algorithm, such as figure 1 As shown, the Log-MAP algorithm is the logarithmic field implementation of the MAP algorithm, and its calculation ...

Claims

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Application Information

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IPC IPC(8): H03M13/27
Inventor 王晓琴刘开阳赵震宇张森林啸
Owner BEIJING SMART LOGIC TECH CO LTD
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