公开(公告)号：US20130122822A1

公开(公告)日：2013-05-16

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

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的方法通常包括从接收机天线采样接收的信号以获得采样序列，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：US10972920B2

公开(公告)日：2021-04-06

申请号：US13753213

申请日：2013-01-29

Applicant: QUALCOMM Incorporated

Inventor： Valentin Alexandru Gheorghiu ,  Masato Kitazoe ,  Brian Clarke Banister ,  Alexei Yurievitch Gorokhov ,  Tingfang Ji ,  Shivratna Giri Srinivasan ,  Amir Farajidana

IPC: H04W24/00 ,  H04L5/00 ,  H04W24/10 ,  H04L1/00

Abstract: Methods and apparatus for performing reference signal (RS) metric measurements in different parts of a channel bandwidth are described. One example method generally includes receiving signaling indicating one or more frequency bands within an operating frequency band of a current serving cell for performing reference signal (RS) metric measurements, performing the measurements on the one or more frequency bands, and reporting the measurements.

公开(公告)号：US09986473B2

公开(公告)日：2018-05-29

申请号：US14271152

申请日：2014-05-06

Applicant: QUALCOMM Incorporated

Inventor： Yongle Wu ,  Shivratna Giri Srinivasan ,  Won-Joon Choi ,  Raghu Narayan Challa ,  Amir Aminzadeh Gohari ,  Mariam Motamed ,  Thomas James Christol ,  Amit Mahajan

IPC: H04W76/28 ,  H04W36/00

CPC classification number: H04W36/0083 ,  H04W76/28 ,  Y02D70/00 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/23 ,  Y02D70/24

Abstract: Certain aspects of the present disclosure relate to methods and apparatus for wireless communication, and more particularly, to methods and apparatus that utilize one or more user equipment (UE) panic states under connected discontinuous reception (C-DRX) mode in long term evolution (LTE).

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：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。