POLAR CODING DESIGN FOR PERFORMANCE AND LATENCY

WIPO Patent Application WO/2018/161762

A1

A wireless device may decode a polar coded codeword using a successive cancelation (SC) or successive cancelation list (SCL) decoder. The decoder may include an indication of the channel indices for the information bits in the codeword, as well as a default value for the frozen bits. The decoder may determine that the frozen bits preceding the first information bit are all the default value, and may refrain from performing decoding operations to decode these frozen bits. To further reduce decoding latency, an encoder may assign the first information bit to a channel with a higher channel index but a lower reliability. The new first information bit may have more frozen bits preceding it, so the decoder may further reduce the number of decoding operations to decode the codeword. In some cases, the encoder may select the channels for the information bits based on performance and latency thresholds.

LI JIAN (US)
XU CHANGLONG (US)
WEI CHAO (US)
HOU JILEI (US)

PCT/CN2018/075588

September 13, 2018

February 07, 2018

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QUALCOMM INC (US)
LI JIAN (CN)
XU CHANGLONG (CN)
WEI CHAO (CN)
HOU JILEI (US)

H03M13/13; H04B10/516

US20150333775A1	2015-11-19
US9503126B2	2016-11-22
US20170047947A1	2017-02-16

HUAWEI ET AL.: "Evaluation of channel coding schemes for control channel", R1-1608863; 3GPP TSG RAN WG1 MEETING #86B, 9 October 2016 (2016-10-09), XP051148917
ZTE ET AL.: "Consideration on polar codes for NR", 3GPP TSG RAN WG1 #87 R1-1611113, 13 November 2016 (2016-11-13), Reno, US, XP051175095

NTD PATENT & TRADEMARK AGENCY LIMITED (CN)

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