公开(公告)号：US20210226687A1

公开(公告)日：2021-07-22

申请号：US16749879

申请日：2020-01-22

Applicant: Qualcomm Incorporated

Inventor： Parisa Cheraghi ,  Veljko Boljanovic ,  Alexei Yurievitch Gorokhov

IPC: H04B7/08 ,  H04B7/0495 ,  H04B7/06 ,  H04L5/00 ,  H04B7/0456 ,  H04B17/318

Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may perform a digital simulation to determining a precoding matrix indicator (PMI) associated with a digital reception beam. A base station may send, to the UE, a reference signal, and the UE may generate digital sector beams spanning a set of oversampled digital reception beams. The digital sector beams may be generated based on the number of antennas of the UE and a Kaiser Window configuration. The UE may perform a coarse beam search procedure on the reference signal using the set of digital sector beams and select a digital sector beam for a refined beam search used to determine a PMI for reporting to the base station.

公开(公告)号：US11050465B2

公开(公告)日：2021-06-29

申请号：US16449293

申请日：2019-06-21

Applicant: QUALCOMM Incorporated

Inventor： Parisa Cheraghi ,  Alexei Yurievitch Gorokhov

IPC: H04B7/0417 ,  H04B17/336 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/06

Abstract: Aspects are provided allowing a UE configured for Type II channel state feedback (CSF) to determine based on one or more antenna configurations or channel conditions whether to use the Type II codebook or to revert to a Type I codebook when computing CSF. Based on this determination, the UE may compute CSF based on the Type I codebook in situations where the performance gain of Type II codebooks may be reduced, thereby saving computational power, transmission power, and/or overhead when computing and reporting CSI feedback. The UE may subsequently transmit the CSF computed based on the Type I codebook in the allocated resources for Type II CSI feedback without the need for a separate signaling format, thereby simplifying and enabling reuse of the CSI feedback procedure.

公开(公告)号：US11038621B2

公开(公告)日：2021-06-15

申请号：US16578183

申请日：2019-09-20

Applicant: QUALCOMM Incorporated

Inventor： Igor Gutman ,  Parisa Cheraghi ,  Michael Levitsky ,  Alexei Yurievitch Gorokhov

IPC: H04L12/26 ,  H04L1/00 ,  H04L25/02

Abstract: Aspects of the disclosure relate to dynamically adapting the mapping between spectral efficiencies and channel quality indicators in real-time based on the channel conditions. In some examples, a scheduled entity (e.g., a UE) may maintain two or more predefined tables or other mappings, each including a respective mapping between spectral efficiency threshold values and channel quality indicators for a respective channel type. The UE may then calculate respective weighted sums of the spectral efficiency threshold values across the two or more predefined tables based on the current wireless channel. For example, the UE may estimate the wireless channel and determine respective weights to be applied to the spectral efficiency threshold values across the two or more predefined tables based on the channel estimate. Other aspects, features, and embodiments are also claimed and described.

公开(公告)号：US20200351046A1

公开(公告)日：2020-11-05

申请号：US16805652

申请日：2020-02-28

Applicant: QUALCOMM Incorporated

Inventor： Yan Zhou ,  Tao Luo ,  Ruhua He ,  Stefan Brueck ,  Parisa Cheraghi

IPC: H04L5/00 ,  H04W72/04 ,  H04W52/14 ,  H04W52/24

Abstract: Methods, systems, and devices for wireless communications are described. The described techniques provide for dynamic updates to beam failure detection (BFD) reference signals (RSs) and path loss RS using medium access control-control element (MAC-CE) or downlink control information (DCI). For example, the quasi co-location (QCL) of periodic CSI-RS may be dynamically updated by the MAC-CE or DCI when the periodic CSI-RS is for BFD RS. Also, a semi-persistent CSI-RS or aperiodic CSI-RS may act as a BFD RS. An enhanced update procedure may be used to update the path loss RS dynamically using MAC-CE or DCI. In some cases, the path loss RS parameters updated via MAC-CE or DCI may overwrite the previously RRC configured path loss RS parameters. In another example, if the path loss RS is not configured, then the path loss RS by default may be the spatial relation reference signal of the corresponding uplink beam.