AJOU Central Library Repository: A Power Gating-based Energy-Efficient SCL Decoding Method for Polar Codes

Graduate School of Ajou University Department of Electronic Engineering 3. Theses(Master)

A Power Gating-based Energy-Efficient SCL Decoding Method for Polar Codes

Keyword: 5G; Decoding; Polar Codes; Power Gating; SCL; Successive Cancellation List

Alternative Abstract: The successive cancellation list (SCL) decoding algorithm has been proposed to enhance error correction in successive cancellation (SC) decoders for polar codes. However, implementing SCL decoding in hardware requires multiple SC cores, which leads to increased hardware complexity, power consumption, and computational complexity. In this thesis, we propose a power-efficient SCL decoding architecture that utilize power gating techniques to address these issues. The proposed power gating-based SCL decoder architecture operates in the following two scenarios. The first scenario involves shutting off a subset of the decoding cores for the entire decoding process, using power gating. This approach significantly reduces computational complexity by up to 75% in low noise environments. The second scenario achieves low power consumption by selectively shutting off some decoding cores during specific parts of the decoding process. This method results in up to 19% of reduction in computational complexity. The proposed architecture and scenarios are also evaluated in terms of error correction performance, measured by the frame error rate (FER). The two scenarios in which the proposed architecture operates provide us with a wider range of performance options that span from a conventional SCL with a list size of L−M to a conventional SCL with a list size of L.

Appears in Collections:: Graduate School of Ajou University > Department of Electronic Engineering > 3. Theses(Master)

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