User equipment performing blind decoding and operating method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsDaeson Kim, Juhyuk Im
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Abstract
A method of wireless communication is described. A user equipment performs data communication based on a polar code with a base station by obtaining a physical downlink control channel (PDCCH) candidate from at least one search area in a frequency band for the data communication, performing error detection on frozen bits of the PDCCH candidate, determining whether the PDCCH candidate is a valid PDCCH candidate based on a result of the error detection, and selectively performing polar decoding on the PDCCH candidate based on a determination result of the valid PDCCH candidate.
Claims19
A method of data communication, the method comprising:
- obtaining a physical downlink control channel (PDCCH) candidate from at least one search area in a frequency band for the data communication;
- performing error detection on frozen bits of the PDCCH candidate;
- determining whether the PDCCH candidate is a valid PDCCH candidate based on a result of the error detection;
- and
- selectively performing polar decoding on the PDCCH candidate based on a determination result of the valid PDCCH candidate,
- wherein the performing of the error detection further comprises:
- performing a hard decision on a log likelihood ratio (LLR) of the PDCCH candidate;
- first multiplying a result of the hard decision by a generator matrix used for polar encoding;
- and
- generating a frozen bit error ratio (FBER) from a result of the first multiplying.
A user equipment comprising:
- a transceiver configured to receive data based on a polar code from a base station;
- and
- a processor configured to perform error detection on frozen bits of a physical downlink control channel (PDCCH) candidate, determine whether the PDCCH candidate is a valid PDCCH candidate based on a result of the error detection, and perform selective polar decoding on the PDCCH candidate based on a determination result of the valid PDCCH candidate to obtain DCI from the data,
- wherein the processor is configured to perform hard decision on a log likelihood ratio (LLR) of the PDCCH candidate, first multiply a result of the hard decision by a generator matrix used for polar encoding, generate a frozen bit error rate (FBER) from a result of the first multiplying, and determine whether the PDCCH candidate is the valid PDCCH candidate based on the FBER.
A method of a user equipment, the method comprising:
- performing polar code-based error detection for each of a plurality of physical downlink control channel (PDCCH) candidates for obtaining DCI for data communication;
- determining valid PDCCH candidates from among the plurality of PDCCH candidates based on a result of the error detection;
- and
- performing blind decoding on the valid PDCCH candidates,
- wherein for each of the plurality of PDCCH candidates, the performing of the polar code-based error detection comprises:
- performing a hard decision on a log likelihood ratio (LLR) of the PDCCH candidate;
- first multiplying a result of the hard decision by a generator matrix used for polar encoding;
- and
- generating a frozen bit error ratio (FBER) from a result of the first multiplying.
Dependencies are inferred from the claim text.