公开(公告)号：US12120050B2

公开(公告)日：2024-10-15

申请号：US17717682

申请日：2022-04-11

申请人： QUALCOMM Incorporated

发明人： Michael Levitsky ,  Assaf Touboul ,  Lev Zavurov ,  Daniel Paz ,  Gideon Shlomo Kutz

IPC分类号： H04L25/02 ,  H04L5/00 ,  H04L27/26 ,  H04W72/1263

CPC分类号： H04L5/0048 ,  H04L25/0238 ,  H04L27/2601 ,  H04W72/1263

摘要： Methods, systems, and devices for wireless communications are described. The described techniques support blind common phase error (CPE) and residual carrier frequency offset mitigation. Generally, the described techniques provide for blind CPE mitigation at a receiving device without a phase tracking reference signal (PTRS) associated with less overhead and improved performance as compared to use of a PTRS to mitigate CPE. A receiving device may receive a shared channel message in a scheduled shared channel allocation in accordance with a PTRS configuration that omits a PTRS allocation based on a capability of the receiving device to apply blind CPE mitigation for shared channel receptions. In some examples, with a single DMRS symbol allocation, blind CPE mitigation for each subsequent data symbol of a shared channel message may be based on the blind CPE estimation for the previous symbol, which may enable robust mitigation of a residual carrier frequency offset.

公开(公告)号：US20230327829A1

公开(公告)日：2023-10-12

申请号：US17717682

申请日：2022-04-11

申请人： QUALCOMM Incorporated

发明人： Michael Levitsky ,  Assaf Touboul ,  Lev Zavurov ,  Daniel Paz ,  Gideon Shlomo Kutz

IPC分类号： H04L5/00 ,  H04L27/26 ,  H04L25/02 ,  H04W72/12

CPC分类号： H04L5/0048 ,  H04L27/2601 ,  H04L25/0238 ,  H04W72/1263

摘要： Methods, systems, and devices for wireless communications are described. The described techniques support blind common phase error (CPE) and residual carrier frequency offset mitigation. Generally, the described techniques provide for blind CPE mitigation at a receiving device without a phase tracking reference signal (PTRS) associated with less overhead and improved performance as compared to use of a PTRS to mitigate CPE. A receiving device may receive a shared channel message in a scheduled shared channel allocation in accordance with a PTRS configuration that omits a PTRS allocation based on a capability of the receiving device to apply blind CPE mitigation for shared channel receptions. In some examples, with a single DMRS symbol allocation, blind CPE mitigation for each subsequent data symbol of a shared channel message may be based on the blind CPE estimation for the previous symbol, which may enable robust mitigation of a residual carrier frequency offset.

公开(公告)号：US10651967B1

公开(公告)日：2020-05-12

申请号：US16275082

申请日：2019-02-13

申请人： QUALCOMM Incorporated

发明人： Lev Zavurov ,  Ronen Shaked

IPC分类号： H04L1/00 ,  H04L27/26 ,  H04L5/00

摘要： Aspects of the present disclosure provide a method performed at a user equipment (UE) that includes determining a first suggested modulation coding scheme (MCS) and a second suggested MCS for one or more first time periods and one or more second time periods, respectively, based on first/second time differences between the one or more first time periods/second time periods and one or more time periods allocated for a demodulation reference signal (DMRS). The method further includes receiving, from the BS, an indication of a first MCS and a second MCS determined by the BS based on the first suggested MCS and the second suggested MCS. The method further includes receiving, from the BS, data in the one or more first time periods using the first MCS and data in the one or more second time periods using the second MCS.