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1. (WO2018137567) DECODING METHOD AND APPARATUS FOR POLAR CODE

Pub. No.:    WO/2018/137567    International Application No.:    PCT/CN2018/073417
Publication Date: Fri Aug 03 01:59:59 CEST 2018 International Filing Date: Sat Jan 20 00:59:59 CET 2018
IPC: H04L 1/00
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: LUO, Hejia
罗禾佳
LI, Rong
李榕
ZHANG, Gongzheng
张公正
CHEN, Ying
陈莹
ZHANG, Huazi
张华滋
HUANGFU, Yourui
皇甫幼睿
Title: DECODING METHOD AND APPARATUS FOR POLAR CODE
Abstract:
The present application discloses a decoding method and decoding apparatus for a polar code. The decoding method comprises: a terminal receiving a symbol sequence, wherein the symbol sequence is obtained by using a Polar code to encode control information and modulating and mapping same by a base station; the terminal demapping and demodulating the symbol sequence to obtain an encoded sequence; the terminal selecting two encoded sub-sequences from the encoded sequence; the terminal performing Polar decoding on the two encoded sub-sequences to obtain an information bit set, wherein the information bit set comprises downlink control information (DCI) and a cyclical redundancy check (CRC) sequence; and the terminal descrambling the CRC sequence using a terminal identifier and the terminal performing a CRC check on the DCI, and if the CRC check is passed, the DCI being obtained. By means of the decoding method, the number of times of blind detection for downlink control information is reduced by half.