Method and device for estimating channel in wireless communication system
A technology for a wireless communication system and user equipment, which is applied in the field of wireless communication systems and can solve problems such as not being precoded.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0146] Embodiment 1 (port switching)
[0147] A first embodiment of the present invention relates to a method of using DMRS port i and DMRS port j in a port-switched manner.
[0148] For example, when a specific UE manages port 7 and port 11 in a way of switching ports, DMRS is received by port 11 using nSCID 0 or 1 instead of port 7 in single-layer transmission, and the fifth layer is in 5-layer transmission Receive with fixed nSCID 0 and port 7 instead of port 11. In Embodiment 1-1 and Embodiment 1-2 below, port switching is explained in more detail.
[0149] Embodiment 1-1 (port exchange in the same CDM group)
[0150] According to the related art, the DMRS port is CDM or FDM using Walsh codes. In particular, ports {7, 8, 11, and 13} and ports {9, 10, 12, and 14} are respectively CDM for the same frequency resource, and two port groups are FDM.
[0151] First, as a first embodiment, a benefit that can be obtained by applying port switching between ports in the same CDM ...
Embodiment 1-2
[0163] Embodiment 1-2 (port switching between different CDM groups)
[0164] As embodiment 1-2 of the present invention, such as Figure 13 As shown, port switching can be applied between CDM groups.
[0165] Such as Figure 13 As shown, the UE to which port switching is applied can receive the DMRS in such a manner that the DCI field assigned to Table 3 is interpreted as Table 8.
[0166] [Table 8]
[0167]
[0168] If so Figure 13 Applying port switching, the number of MU-MIMO UEs with orthogonal DMRS and the number of MU-MIMO layers can be increased. For example, as shown below, MU-MIMO can be performed for 4 UEs with orthogonal DMRS.
[0169] [Table 9]
[0170] UE 1 (switching off) Port 7, nSCID=0, VCID=x UE 2 (switch off) Port 8, nSCID=0, VCID=x UE 3 (swapping on) Port 11, nSCID=0, VCID=x UE 4 (swapping on) Port 13, nSCID=0, VCID=x
[0171] As a different example, as shown in Table 10 below, MU-MIMO may be performed for 2 UE...
Embodiment 1-3
[0174] Embodiment 1-3 (using a plurality of exchange patterns)
[0175] When the UE utilizes the Figure 12 and 13 The number of MU-MIMO UEs with orthogonal DMRS can be increased to 8 when the exchange pattern shown in , and other various exchange patterns in the cell are illustrated. For example, as shown in Table 11 below, MU-MIMO can be performed among 8 UEs.
[0176] [Table 11]
[0177] UE 1 (switching off) Port 7, nSCID=0, VCID=x UE 2 (switch off) Port 8, nSCID=0, VCID=x UE 3 (in Figure 12 swap mode is on in Port 11, nSCID=0, VCID=x UE 4 (in Figure 12 swap mode is on in Port 13, nSCID=0, VCID=x UE 5 (in Figure 13 swap mode is on in Port 9, nSCID=0, VCID=x UE 6 (in Figure 13 swap mode is on in Port 10, nSCID=0, VCID=x UE 7 (Other switch mode enabled) Port 12, nSCID=0, VCID=x UE 8 (Other switching modes are enabled) Port 14, nSCID=0, VCID=x
[0178] More generally, the base station can signal 8 DMRS...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More