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1.发明公开
公开(公告)号：EP4443765A1
公开(公告)日：2024-10-09
申请号：EP21965331.8
申请日：2021-11-29
发明人： CHI, Liangang , YANG, Li
IPC分类号： H04B7/08
CPC分类号： H04B7/08
摘要： The present disclosure provides a precoding method and apparatus, a user equipment (UE), an RIS array, a base station and a storage medium, and relates to the technical field of communications. The method comprises: an RIS array determining incident angle information of an incident beam and then obtaining a PMI, wherein the PMI is determined on the basis of channel information between the RIS array and a UE; then determining reflection angle information corresponding to the RIS array on the basis of the PMI; determining a target deflection phase angle of each RIS array element in the RIS array on the basis of the incident angle information and the reflection angle information to perform precoding on the RIS array. The precoding method provided by the present disclosure is lower in complexity and wider in application range.
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2.发明公开
公开(公告)号：EP4425800A1
公开(公告)日：2024-09-04
申请号：EP21961775.0
申请日：2021-10-27
发明人： CHI, Liangang , YANG, Li
IPC分类号： H04B7/0413 , H04B7/0456
CPC分类号： H04B7/0413 , H04B7/0456
摘要： The present disclosure relates to the technical field of communications, and provides a precoding method and apparatus, a user equipment, a reconfigurable intelligent surface (RIS) array, and a storage medium. The method comprises: determining an offset phase angle list corresponding to an RIS array, the offset phase angle list comprising at least one row of offset phase angle sequences, the offset phase angle sequences comprising offset phase angles of all RIS array elements in the RIS array, wherein each row of offset phase angle sequences are used for causing the RIS array to reflect an incident signal along a pair of reflection angles, the pair of reflection angles comprise a horizontal-dimension reflection angle and a vertical-dimension reflection angle, and each row of offset phase angle sequences correspond to an index value; acquiring a first index value sent by a user equipment (UE); determining, from the offset phase angle list, a first offset phase angle sequence corresponding to the first index value; and configuring the offset phase angles of all RIS array elements in the RIS array on the basis of the first offset phase angle sequence so as to precode the RIS array. The precoding method provided by the present disclosure is low in complexity and wide in application range.
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公开(公告)号：EP4429131A1
公开(公告)日：2024-09-11
申请号：EP21962829.4
申请日：2021-11-03
发明人： CHI, Liangang , YANG, Li
摘要： Embodiments of the present disclosure discloses a method and apparatus for precoding a reconfigurable intelligent surface (RIS), the method is performed by a terminal device, including: determining a precoding matrix indicator (PMI) and an additional deflection phase angle for each RIS unit group in an RIS array according to channel information of the each RIS unit group; and sending first indication information, where the first indication information indicates the precoding matrix indicator and the additional deflection phase angle for the each RIS unit group. Therefore, a terminal device indicates, to a network device or an RIS array, a PMI and an additional deflection phase angle which correspond to each RIS unit group, such that the network device or the RIS array performs precoding on each RIS unit group, thereby preventing the problem of a precoding scheme failing due to the RIS array not meeting the far-field hypothesis, and also reducing the complexity of RIS precoding.
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