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- W2951036613 abstract "Sphere decoding (SD) of polar codes is an efficient method to achieve the error performance of maximum likelihood (ML) decoding. But the complexity of the conventional sphere decoder is still high, where the candidates in a target sphere are enumerated and the radius is decreased gradually until no available candidate is in the sphere. In order to reduce the complexity of SD, a stack SD (SSD) algorithm with an efficient enumeration is proposed in this paper. Based on a novel path metric, SSD can effectively narrow the search range when enumerating the candidates within a sphere. The proposed metric follows an exact ML rule and takes the full usage of the whole received sequence. Furthermore, another very simple metric is provided as an approximation of the ML metric in the high signal-to-noise ratio regime. For short polar codes, simulation results over the additive white Gaussian noise channels show that the complexity of SSD based on the proposed metrics is up to 100 times lower than that of the conventional SD." @default.
- W2951036613 created "2019-06-27" @default.
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- W2951036613 date "2013-08-13" @default.
- W2951036613 modified "2023-09-23" @default.
- W2951036613 title "Low-Complexity Sphere Decoding of Polar Codes based on Optimum Path Metric" @default.
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- W2951036613 doi "https://doi.org/10.48550/arxiv.1308.2894" @default.
- W2951036613 hasPublicationYear "2013" @default.
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