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- Title
一种咬尾双二进制Turbo码并行译码方案.
- Authors
王琼; 王伦; 杨太海
- Abstract
When the tail-biting duo-binary Turbo codes use parallel and sliding window joint decoding technology, the tail-biting encoding structure and the window segmentation lead to the difficulty of obtaining the boundary state metric. To solve the problem, this paper presents a novel parallel and sliding window decoding scheme called extended overlap scheme. The new scheme utilizes two new decoding techniques: the boundary state blind estimation technique and the sliding window state backtracking technique. Compared with the traditional Boundary State Metric Propagation(BSMP) method(also called the iterative method), on the one hand, the new method improves the accuracy of the boundary state metric, thus speeding up the decoding convergence, and reducing the performance loss at a high signal-to-noise ratio(SNR) to some extent. On the other hand, it helps to avoid storing the state metric of the last iteration,which is more conducive to the hardware design. Simulation results show that this method can eliminate the effects of parallel and sliding window, approximating the performance of the original non-parallel and non-sliding window decoding method at the medium window length about 64. And the smaller the window length is, the more obvious the decoding performance gain is than the traditional iteration method. Therefore, this scheme has better practicability and application value, which satisfies the current high speed, low latency and low storage data transmission requirements of 5G.
- Publication
Telecommunication Engineering, 2017, Vol 57, Issue 12, p1349
- ISSN
1001-893X
- Publication type
Article
- DOI
10.3969/j.issn.1001-893x.2017.12.001