Threshold blind detection method for distinguishing noise frame and polarization code word frame

Abstract

The invention discloses a threshold blind detection method for distinguishing a noise frame and a polarization code word frame. The method comprises the following steps: 1) determining the code length N and the information bit length K of a transmitting end polarization code word; 2) performing Monte Carlo simulation on the receiving end to obtain a curve related to the frame error rate and the channel signal-to-noise ratio of the polar code of the transmitting end; 3) setting a target frame error rate according to an omission ratio actually required by a blind detection system, and determining a threshold signal-to-noise ratio on the curve according to the target frame error rate; 4) according to N, K and a threshold signal-to-noise ratio, constructing an LLR threshold of each SC decoding code tree node; 5) in the first stage of blind detection of the receiving end, decoding each PDCCH Candidate, and counting the number of nodes which do not pass the threshold detection during decoding; 6) selecting B PDCCH Candidates which do not pass the threshold value test and have the least number of nodes to enter SCL decoding; 7) performing CRC by each receiving end, and if the CRC is successful, determining that the blind detection is successful.

Description

technical field [0001] The invention belongs to the technical field of mobile network communication, and in particular relates to a threshold value blind detection method for distinguishing noise frames and polarization codeword frames. Background technique [0002] In the 5G (5th Generation mobile networks, fifth-generation mobile network) NR (New Radio, new air interface) standard, PDCCH (Physical Download Control Channel, physical downlink control channel) carries the scheduling of a specific UE (User Equipment, user equipment) . Resource allocation information, such as public scheduling assignment of downlink resource allocation, uplink grant, random access response, uplink power control command, signaling message (such as system message, paging message, etc.). [0003] The payload carried on the PDCCH is called DCI (Downlink Control Information, downlink control information). Among them, CRC (Cyclic Redundancy Check, cyclic redundancy check) will be added to help detec...

AI Technical Summary

Problems solved by technology

In actual scenarios, in order to achieve the same frame error rate index, the complexity of general BP decoding is much higher than that of SC decoding

Therefore, in order to achieve better frame error rate performance, the existing two methods based on BP decoding algorithm to distinguish noise frames and polarized codeword frames have the problem of high complexity, resulting in low data transmission rate in actual scenarios , unable to meet the requirements of low latency in the system

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