5G NR PDCCH blind detection method

Abstract

The invention provides a 5G NR PDCCH blind detection method, belongs to the field of wireless communication, and the method comprises CSS blind detection and USS blind detection, employs a pure software mode to achieve the quick blind detection of a 5G NR PDCCH, and reduces the blind detection frequency under the condition of guaranteeing the blind detection success probability. Aiming at the problem that an existing blind detection method needs to calculate power in two steps, parallel calculation is adopted for each candidate, and the processing speed is increased; and the AL sequence corresponding to the boundary CQI is adjusted for the AL sequence error caused by the channel quality (CQI) located at the boundary, thereby reducing the number of blind tests.

Description

technical field [0001] The invention belongs to the field of wireless communication, and in particular relates to a 5G NR PDCCH blind detection method. Background technique [0002] In wireless communication based on the 5G NR protocol, the UE needs to demodulate the received PDCCH to obtain the control information necessary to demodulate the data channel. Therefore, the correct demodulation of the PDCCH plays a crucial role in the demodulation of the data channel. When processing PDCCH, 5G NR introduces CORESET and PDCCH DMRS. The demodulation of PDCCH needs to carry out blind detection at first. In order to reduce the number of blind detections, the protocol defines a search space to reduce the CCE candidate set as much as possible. In the 5G system, the search space is divided into common search space (CSS) and user-specific search space (USS), where the public search space is subdivided into Type0-PDCCH common search space, Type0A-PDCCH common search space, Type1-PDCC...

AI Technical Summary

Problems solved by technology

[0019] The above-mentioned existing blind detection method has the following disadvantages: first, it needs to use a two-step algorithm to calculate the power value, remove the sequence number of the candidate set, and use the maximum power value to represent the average power of each CCE in the entire CORESET; When the CQI selects the AL order, there is an AL order judgment error. For example, when c=6, the base station thinks that the environmental channel quality is good, the AL order should be 2, 4, 1, 8, 16, if according to AL=4, 8 , 2, 16, 1 for blind inspection, resulting in an increase in the number of blind inspections and low blind inspection efficiency

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