Design and Architecture of Low-Latency High-Speed Turbo Decoders

Jung, Ji Won; Lee, In Ki; Choi, Duk Gun; Jeong, Jin A; Kim, Ki Man; Choi, Eun-A; Oh, Deock-Gil

doi:10.4218/etrij.05.0905.0033

Cited by 4 publications

(1 citation statement)

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“…On the BCJR level, many researches in the literature have proposed methods to deploy parallel processing to speed up the computations of the algorithm's metrics. For example, methods are proposed in [18], [22]- [26] to compute the forward and backward metrics separately in parallel starting from both ends of the whole data block or from a sliding window. Fully-Parallel Turbo Decoding algorithms [27], [28] process the decoding in parallel fashion in terms of the computations of the BCJR parameters per individual bit.…”

Section: Deploying Parallel Decodingmentioning

confidence: 99%

Combining serial and parallel decoding for turbo codes

AlMahamdy

Al-Falahy²

2021

IJEECS

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Reducing the decoding latency of the turbo codes is important to real-time applications. Conventionally, the decoding of the turbo codes (TC) runs in serial fashion, which means only one of the constituent soft decoders runs at a time. Parallel decoding (PD) refers to running the soft decoders in parallel. Although it delivers the output faster (compared to the serial decoding (SD)), it affects the bit- and frame-error rates. This paper proposes a decoding procedure that combines both PD and SD. It bridges the two decoding modes to determine the best combination scheme to achieve the required level of performance at an acceptable decoding latency. Presented results show how this procedure can mitigate the performance degradation at a slight increase in the decoding latency.

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