公开(公告)号：US11632754B2

公开(公告)日：2023-04-18

申请号：US17166289

申请日：2021-02-03

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Le Liu ,  Peter Gaal ,  Supratik Bhattacharjee ,  Qiang Shen ,  Rebecca Wen-Ling Yuan

IPC: H04J3/00 ,  H04W72/0446 ,  H04L5/00

Abstract: Certain aspects of the present disclosure provide techniques for indicating capability of a user equipment (UE) to support multiple sounding reference signals (SRSs) with a single subframe, with at least one of frequency hopping, different bandwidths, or antenna switching for the multiple SRSs in the same subframe.

公开(公告)号：US11316633B2

公开(公告)日：2022-04-26

申请号：US16268244

申请日：2019-02-05

Applicant: QUALCOMM Incorporated

Inventor： Tae Min Kim ,  Jae Ho Ryu ,  Alberto Rico Alvarino ,  Le Liu ,  Sven Fischer ,  Supratik Bhattacharjee

IPC: H04L5/00 ,  H04W72/08 ,  H04L27/26 ,  H04W64/00 ,  G01S1/20 ,  H04W88/08 ,  H04W88/02 ,  G01S5/02

Abstract: Disclosed are techniques for transmitting and receiving an extended narrowband positioning reference signal (NPRS) sequence. In an aspect, a base station generates the extended NPRS sequence and transmits, to at least one user equipment (UE) over a wireless narrowband channel, the extended NPRS sequence. In an aspect, a UE receives, over the wireless narrowband channel, an NPRS of a first subset of the extended NPRS sequence and measures the NPRS of the first subset of the extended PRS sequence. In an aspect, the extended NPRS sequence may be a function of a plurality of slot numbers of a plurality of slots of a plurality of sequential radio frames and a plurality of symbol indexes of a plurality of symbols of a single physical resource block.

公开(公告)号：US11277792B2

公开(公告)日：2022-03-15

申请号：US16190903

申请日：2018-11-14

Applicant: QUALCOMM Incorporated

Inventor： Prasad Reddy Kadiri ,  Alberto Rico Alvarino ,  Umesh Phuyal ,  Wanshi Chen ,  Supratik Bhattacharjee ,  Peter Gaal

IPC: H04W52/02 ,  H04L1/00 ,  H04W24/10 ,  H04L5/00 ,  H04L5/14 ,  H04W72/08 ,  H04W56/00

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for reporting aperiodic channel quality indicator (A-CQI) in a new Secondary Cell (SCell) state of Long Term Evolution (LTE) carrier aggregation. A User Equipment (UE) receives a request for reporting A-CQI relating to a Scell configured for the UE when the UE is in a first state corresponding to the Scell, the first state designed for a reduced SCell activation latency and to result in the UE using lower power as compared to when the UE is in a second state. The UE, in response to the request, reports the A-CQI for the Scell in accordance with a first A-CQI reporting configuration for the first state which is different from a second A-CQI reporting configuration for the second state.

公开(公告)号：US20220078776A1

公开(公告)日：2022-03-10

申请号：US17455372

申请日：2021-11-17

Applicant: QUALCOMM Incorporated

Inventor： Alberto Rico Alvarino ,  Alexandros Manolakos ,  Amir Farajidana ,  Supratik Bhattacharjee ,  Seyedkianoush Hosseini

IPC: H04W72/04 ,  H04L5/00

Abstract: In an aspect, a method of wireless communication includes receiving, by a user equipment (UE), downlink control information (DCI) having a resource allocation of allocated physical resource blocks (PRBs). The method additionally includes employing at least one of a) a wideband decoder, b) a wideband channel estimator, c) a bandwidth-specific decoder, or d) a bandwidth-specific channel estimator for wireless communications based at least on a feature of the resource allocation in the DCI. In other aspects a UE transmits, to a base station, an indication of UE capabilities regarding support of wideband physical resource group (PRG) for various transmission time interval (TTI) durations.

公开(公告)号：US09307549B2

公开(公告)日：2016-04-05

申请号：US14207492

申请日：2014-03-12

Applicant: QUALCOMM Incorporated

Inventor： Udara Charman Fernando ,  Supratik Bhattacharjee ,  Valentin Alexandru Gheorghiu ,  Gene Fong

IPC: H04W4/00 ,  H04W72/08 ,  H04W24/10 ,  H04B1/18 ,  H04L1/00 ,  H04B1/10 ,  H04L27/00

CPC classification number: H04W72/085 ,  H04B1/1027 ,  H04B1/18 ,  H04L1/0003 ,  H04L1/0022 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/0038 ,  H04L27/0002 ,  H04W24/10

Abstract: To support very high QAM rates, a user equipment (UE) needs extremely good signal-to-noise ratio (SNR). Using a receiver configuration that improves SNR comes at the expense of higher power consumption. However, consuming higher power to support very high QAM rates when poor channel conditions are present is a waste of power. By correlating the modulation and coding scheme used by the UE with the UE channel quality estimate, the UE can modify the receiver configuration to improve SNR only when channel conditions support very high QAM rates.

Abstract translation: 为了支持非常高的QAM速率，用户设备（UE）需要非常好的信噪比（SNR）。 使用提高SNR的接收机配置来代替更高的功耗。 然而，当存在较差的信道条件时，消耗更高的功率来支持非常高的QAM速率是浪费电力。 通过将UE使用的调制和编码方案与UE信道质量估计相关联，UE可以修改接收机配置，以便在信道条件支持非常高的QAM速率时改善SNR。

公开(公告)号：US08954055B2

公开(公告)日：2015-02-10

申请号：US13671680

申请日：2012-11-08

Applicant: QUALCOMM Incorporated

Inventor： Shivratna Giri Srinivasan ,  Brian Clarke Banister ,  Supratik Bhattacharjee

IPC: H04W24/00 ,  H04J11/00 ,  H04L27/26

CPC classification number: H04J11/0073 ,  H04J11/00 ,  H04J11/0076 ,  H04L27/26 ,  H04L27/2657 ,  H04L27/2666 ,  H04L27/2675

Abstract: In a wireless network, a base station (BS) may send a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). The synchronization signals may be used by user equipments (UEs) for cell detection and acquisition. A typical searching operation may involve first locating the PSS sequences transmitted by neighboring BSs, followed by SSS detection. Described further herein are algorithms that result in the detection of the PSS and the SSS from a BS. A method for detecting a BS generally includes sampling a received signal from receiver antennas to obtain a sampled sequence, analyzing the sampled sequence to detect a PSS in a current half-frame (HF), calculating signal-to-noise ratio (SNR) metrics based on the detected PSS, combining the calculated SNR metrics with SNR metrics from previous HFs, analyzing the combined SNR metrics to obtain timing information, and analyzing the sampled sequence using the timing information to detect a SSS.

Abstract translation: 在无线网络中，基站（BS）可以发送主同步信号（PSS）和辅同步信号（SSS）。 同步信号可以由用户设备（UE）用于小区检测和获取。 典型的搜索操作可以包括首先定位由相邻BS发送的PSS序列，随后进行SSS检测。 这里进一步描述了导致从BS检测PSS和SSS的算法。 用于检测BS的方法通常包括对来自接收机天线的接收信号进行采样以获得采样序列，分析采样序列以检测当前半帧（HF）中的PSS，计算信噪比（SNR）度量 基于检测到的PSS，将计算的SNR度量与来自先前HF的SNR度量相结合，分析组合SNR度量以获得定时信息，以及使用定时信息分析采样序列以检测SSS。

公开(公告)号：US08903341B2

公开(公告)日：2014-12-02

申请号：US13705878

申请日：2012-12-05

Applicant: QUALCOMM Incorporated

Inventor： Supratik Bhattacharjee ,  Brian Clarke Banister

IPC: H04B17/00 ,  H04B1/10 ,  H04L25/03 ,  H04J11/00

CPC classification number: H04B1/1027 ,  H04J11/0043 ,  H04L25/03891 ,  H04L2025/03426

Abstract: Certain aspects of the present disclosure provide ordering techniques for a Successive Interference Cancellation (SIC) receiver which may be used to robustly choose a correct stream for first decode under varying data rates, SNR and mobile propagation conditions in Multiple Input Multiple Output (MIMO) systems. The SIC ordering techniques discussed in the disclosure include SNR and/or Rate based information theoretic approach. For example, the SIC receiver may evaluate an SNR based or RATE-based information theoretic metric for the MIMO streams and choose one stream with a higher value of the metric for decoding first. A speculative single code block based approach is may also be used for selecting a stream for first decode, by leveraging the presence of per code block Cyclic Redundancy Check (CRC) and the lack of time diversity in LTE systems.

Abstract translation: 本公开的某些方面提供了用于连续干扰消除（SIC）接收机的排序技术，其可用于在变化的数据速率，多输入多输出（MIMO）系统中的SNR和移动传播条件下）稳健地选择用于第一解码的正确流 。 在本公开中讨论的SIC排序技术包括基于SNR和/或速率的信息理论方法。 例如，SIC接收机可以评估用于MIMO流的基于SNR的或基于RATE的信息理论度量，并且选择具有较高值的​​度量的一个流，以便首先进行解码。 通过利用每个码块循环冗余校验（CRC）的存在和LTE系统中的时间分集的缺乏，也可以使用基于猜测的基于单码块的方法来选择用于第一解码的流。

公开(公告)号：US20140155010A1

公开(公告)日：2014-06-05

申请号：US13705878

申请日：2012-12-05

Applicant: QUALCOMM INCORPORATED

Inventor： Supratik Bhattacharjee ,  Brian Clarke Banister

IPC: H04B1/10

CPC classification number: H04B1/1027 ,  H04J11/0043 ,  H04L25/03891 ,  H04L2025/03426

Abstract: Certain aspects of the present disclosure provide ordering techniques for a Successive Interference Cancellation (SIC) receiver which may be used to robustly choose a correct stream for first decode under varying data rates, SNR and mobile propagation conditions in Multiple Input Multiple Output (MIMO) systems. The SIC ordering techniques discussed in the disclosure include SNR and/or Rate based information theoretic approach. For example, the SIC receiver may evaluate an SNR based or RATE-based information theoretic metric for the MIMO streams and choose one stream with a higher value of the metric for decoding first. A speculative single code block based approach is may also be used for selecting a stream for first decode, by leveraging the presence of per code block Cyclic Redundancy Check (CRC) and the lack of time diversity in LTE systems.

Abstract translation: 本公开的某些方面提供了用于连续干扰消除（SIC）接收机的排序技术，其可用于在变化的数据速率，多输入多输出（MIMO）系统中的SNR和移动传播条件下）稳健地选择用于第一解码的正确流 。 在本公开中讨论的SIC排序技术包括基于SNR和/或速率的信息理论方法。 例如，SIC接收机可以评估用于MIMO流的基于SNR的或基于RATE的信息理论度量，并且选择具有较高值的​​度量的一个流，以便首先进行解码。 通过利用每个码块循环冗余校验（CRC）的存在和LTE系统中的时间分集的缺乏，也可以使用基于猜测的基于单码块的方法来选择用于第一解码的流。

公开(公告)号：US08670734B2

公开(公告)日：2014-03-11

申请号：US13670580

申请日：2012-11-07

Applicant: QUALCOMM Incorporated

Inventor： Shivratna Giri Srinivasan ,  Raghu Narayan Challa ,  Supratik Bhattacharjee ,  Brian Clarke Banister

IPC: H04B1/10

CPC classification number: H04W56/00 ,  H04B1/7083 ,  H04J11/0069 ,  H04L27/2663

Abstract: Methods and apparatus for determining a reference sequence and timing based on normalized correlations are described. One example method generally includes receiving, at a first antenna of an apparatus, a first signal comprising a reference sequence; receiving, at a second antenna of the apparatus, a second signal comprising the same reference sequence; sampling the first and second signals to form first and second signal sequences; correlating the first and second signal sequences with each of one or more candidate sequences for the reference sequence using normalization; and determining the reference sequence and timing for the first and second signals based on the normalized correlations.

Abstract translation: 描述了基于归一化相关性来确定参考序列和定时的方法和装置。 一个示例性方法通常包括在装置的第一天线处接收包括参考序列的第一信号; 在装置的第二天线处接收包括相同参考序列的第二信号; 对第一和​​第二信号进行采样以形成第一和第二信号序列; 使用归一化将第一和第二信号序列与用于参考序列的一个或多个候选序列中的每一个相关; 以及基于所述归一化相关性来确定所述第一和第二信号的参考序列和定时。

公开(公告)号：US20130121187A1

公开(公告)日：2013-05-16

申请号：US13671017

申请日：2012-11-07

Applicant: Qualcomm Incorporated

Inventor： Sibasish Das ,  Shivratna Giri Srinivasan ,  Supratik Bhattacharjee ,  Brian Clarke Banister

IPC: H04W24/10

CPC classification number: H04W36/0083 ,  H04B17/309 ,  H04B17/318 ,  H04W24/10 ,  H04W36/0088

Abstract: Methods and apparatus for computing measurement metrics in a wireless communications network are provided. One example method generally includes obtaining a channel impulse response (CIR) from one or more reference signals (RSs) transmitted from one or more antennas of a base station (BS); calculating an absolute square per element of the CIR to generate channel energy response (CER) elements; calculating a threshold value based on a noise variance estimated from a portion of the CER elements; selecting CER elements that exceed the threshold value; and computing a reference signal received power (RSRP) value based on the selected CER elements.

Abstract translation: 提供了用于计算无线通信网络中的测量度量的方法和装置。 一个示例性方法通常包括从从基站（BS）的一个或多个天线发送的一个或多个参考信号（RS）获得信道脉冲响应（CIR）; 计算CIR的每个元素的绝对平方，以产生信道能量响应（CER）元素; 基于从所述CER元素的一部分估计的噪声方差来计算阈值; 选择超过阈值的CER元素; 以及基于所选择的CER元素计算参考信号接收功率（RSRP）值。