公开(公告)号：US20130121188A1

公开(公告)日：2013-05-16

申请号：US13671877

申请日：2012-11-08

Applicant: QUALCOMM INCORPORATED

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

IPC: H04W56/00

CPC classification number: H04W56/00 ,  H04J11/0073 ,  H04J11/0076 ,  H04L27/0014 ,  H04L27/261 ,  H04L27/2657 ,  H04L27/2675 ,  H04L2027/0034 ,  H04L2027/0036

Abstract: Certain aspects of the present disclosure relate to a technique for estimating a frequency offset of a local oscillator using primary synchronization signal (PSS) and secondary synchronization signal (SSS) while initially acquiring a long term evolution (LTE) signal. In certain aspects, a frequency offset estimation procedure may include PSS-based frequency offset estimation and SSS-based frequency offset refinement. The PSS-based frequency offset estimation may include determining a suitable reference PSS and using the ascertained reference PSS to estimate a PSS-based frequency offset. The SSS-based frequency offset refinement may include determining a suitable reference SSS using the PSS based frequency offset and using the ascertained reference SSS to refine PSS-based frequency offset from the PSS-based frequency offset estimation.

Abstract translation: 本公开的某些方面涉及在初始获取长期演进（LTE）信号的同时使用主同步信号（PSS）和辅同步信号（SSS）来估计本地振荡器的频率偏移的技术。 在某些方面，频率偏移估计过程可以包括基于PSS的频偏估计和基于SSS的频偏修正。 基于PSS的频率偏移估计可以包括确定合适的参考PSS并且使用确定的参考PSS来估计基于PSS的频率偏移。 基于SSS的频率偏移精化可以包括使用基于PSS的频率偏移来确定合适的参考SSS，并且使用所确定的参考SSS来从基于PSS的频率偏移估计来精简基于PSS的频率偏移。

公开(公告)号：US20230300671A1

公开(公告)日：2023-09-21

申请号：US17698513

申请日：2022-03-18

Applicant: QUALCOMM Incorporated

Inventor： Yubing Jian ,  Arvind Vardarajan Santhanam ,  Ertugrul Necdet CIFTCIOGLU ,  Arnaud Meylan ,  Reza Shahidi ,  Supratik Bhattacharjee ,  Gautham Hariharan

IPC: H04W28/02

CPC classification number: H04W28/0289 ,  H04W28/0284 ,  H04W28/0236

Abstract: Methods, systems, and devices for wireless communication are described. In some wireless communications systems, a receiving device, such as a user equipment (UE), may reduce packet congestion associated with communications between the receiving device and a transmitting device, such as a server, via a radio access network (RAN). The receiving device may measure congestion metrics associated with receiving data packets from the transmitting device via the RAN. The congestion metrics may include RAN congestion metrics and transport or application layer congestion metrics associated with the network connection between the receiving device and the transmitting device. The receiving device may estimate packet congestion at the receiving device according to the measured congestion metrics. The receiving device may modify connection parameters of the network connection based on the estimated packet congestion. The receiving device may communicate with the transmitting device over the network connection in accordance with the modified connection parameters.

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。