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2nd International Conference on Robotics and Automation Sciences (ICRAS)

作者： Zheng, Xin Wang, Jiahao Tang, Bo China Univ Geosci Wuhan Sch Mech Engn & Elect Informat Wuhan Hubei Peoples R China

ISBN: (纸本)9781538673706

In order to implement a low-complexity crc-aided successive cancellation list decoder for polar codes on digital chips, we study the quantization technologies for the initial log likelihood ratios and the path metric distance of the decoder. In order to reduce the block error rate performance loss using the uniform quantization method, we analyze various optimization techniques such as quantization hits and quantization precision for the initial log likelihood ratios and the path metric distance. We provide quantization simulation for realistic code length N = 2(10) and code rate R = 0.5. Simulation results show that 6 bits quantization on interval [-31, +31] for the initial log likelihood ratios and 8 hits quantization on interval [255, +255] for the path metric distance can not only bring the block error rate performance loss less than 0.1 dB, but also decrease the hardware implementation complexity significantly.

关键词： polar codes quantization crc-aided successive cancellation list decoder successive cancellation list decoder successive cancellation decoder

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LLR-Based successive cancellation list Decoding of Polar Codes

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IEEE TRANSACTIONS ON SIGNAL PROCESSING 2015年第19期63卷 5165-5179页

作者： Balatsoukas-Stimming, Alexios Parizi, Mani Bastani Burg, Andreas Swiss Fed Inst Technol EPFL TCL CH-1015 Lausanne Switzerland Swiss Fed Inst Technol EPFL Informat Theory Lab LTHI CH-1015 Lausanne Switzerland

We show that successive cancellation list decoding can be formulated exclusively using log-likelihood ratios. In addition to numerical stability, the log-likelihood ratio based formulation has useful properties that simplify the sorting step involved in successive cancellation list decoding. We propose a hardware architecture of the successive cancellation list decoder in the log-likelihood ratio domain which, compared with a log-likelihood domain implementation, requires less irregular and smaller memories. This simplification, together with the gains in the metric sorter, lead to to higher throughput per unit area than other recently proposed architectures. We then evaluate the empirical performance of the crc-aided successive cancellation list decoder at different list sizes using different crcs and conclude that it is important to adapt the crc length to the list size in order to achieve the best error-rate performance of concatenated polar codes. Finally, we synthesize conventional successive cancellation decoders at large block-lengths with the same block-error probability as our proposed crc-aided successive cancellation list decoders to demonstrate that, while our decoders have slightly lower throughput and larger area, they have a significantly smaller decoding latency.

关键词： crc-aided successive cancellation list decoder hardware implementation polar codes successive cancellation decoder successive cancellation list decoder

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Polar Code for 5G Mobile Communication

Polar Code for 5G Mobile Communication

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2017中国电子设计创新大会

作者： Shi Xiaofeng Rohde & Schwarz(China)Technology Co. Ltd.BeijingChina

Polar code is the first constructive technique to provably achieve channel capacity with rich algebra structure and excellent analysis *** from channel polarization and polar coding,this paper summarizes popular polar decoders with performance *** architecture is also investigated for practical implementations in future 5G mobile communication.

关键词： Polar Codes successive cancellation decoder successive cancellation list decoder crc-aided successive cancellation list decoder Hardware Implementation

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