公开(公告)号：HK1131705A1

公开(公告)日：2010-01-29

申请号：HK09111179

申请日：2009-11-30

Applicant: QUALCOMM INC

Inventor： SHELLHAMMER STEPHEN J

IPC: H04B20060101

Abstract: A method for detecting the presence of a transmission signal in a wireless spectrum channel. The frequency of a signal is converted from a first frequency to a second frequency. The signal with the second frequency is filtered to remove signals that are not within the band of the second frequency. An averaged periodogram of the signal is calculated. A value of the averaged periodogram is compared to a threshold. The presence of the transmission signal is detected, if the value of the averaged periodogram exceeds the threshold.

公开(公告)号：CA2671731A1

公开(公告)日：2008-07-17

申请号：CA2671731

申请日：2008-01-04

Applicant: QUALCOMM INC

Inventor： SHELLHAMMER STEPHEN J

IPC: H04B17/00

Abstract: Methods and apparatus for determining if a signal of interest, for exampl e, a licensed signal having or exceeding a predetermined field strength, is present in a wireless spectrum and/or which facilitates such a determination are described. The signal of interest maybe, e.g., a television signal or a wireless microphone signal using licensed television spectrum. The predeter mined field strength may be specified or by a government regulation or rule.

公开(公告)号：AU2007319384A1

公开(公告)日：2008-05-22

申请号：AU2007319384

申请日：2007-11-10

Applicant: QUALCOMM INC

Inventor： SHELLHAMMER STEPHEN J

IPC: H04B1/46

Abstract: A method for detecting the presence of a transmission signal in a wireless spectrum channel. The frequency of a signal is converted from a first frequency to a second frequency. The signal with the second frequency is filtered to remove signals that are not within the band of the second frequency. An averaged periodogram of the signal is calculated. A value of the averaged periodogram is compared to a threshold. The presence of the transmission signal is detected, if the value of the averaged periodogram exceeds the threshold.

公开(公告)号：WO2012061504A3

公开(公告)日：2012-08-02

申请号：PCT/US2011058966

申请日：2011-11-02

Applicant: QUALCOMM INC ,  ABRAHAM SANTOSHM PAUL ,  JAIN AVINASH ,  SHELLHAMMER STEPHEN J ,  SAMPATH HEMANTH

Inventor： ABRAHAM SANTOSHM PAUL ,  JAIN AVINASH ,  SHELLHAMMER STEPHEN J ,  SAMPATH HEMANTH

IPC: H04W72/04 ,  H04W16/14

CPC classification number: H04W72/0453 ,  H04L5/0096 ,  H04W16/14 ,  H04W88/06

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for operating in a television white space (TVWS) network. One example method generally includes receiving, at an apparatus, a message with a field indicating a current version of an unused frequency spectrum map (e.g., a white space map (WSM)), the unused frequency spectrum map indicating channels usable for wireless communications; determining whether the current version of the unused frequency spectrum map is different than a previous version of the unused frequency spectrum map; and using a channel for wireless communications based on the determination. Another example method generally includes accessing a database of available channels for a current location of an apparatus via a neighboring portable or fixed enabling apparatus and enabling one or more portable dependent apparatuses for the wireless communications via one or more of the available channels.

Abstract translation: 本公开的某些方面提供了用于在电视空白（TVWS）网络中操作的技术和装置。 一个示例性方法通常包括在装置处接收具有指示未使用频谱图（例如，空白映射（WSM））的当前版本的字段的消息，该未使用频谱图指示可用于无线通信的信道; 确定当前版本的未使用频谱图是否与未使用的频谱图的先前版本不同; 以及基于该确定使用用于无线通信的信道。 另一示例性方法通常包括经由相邻的便携式或固定的启用设备访问设备的当前位置的可用信道的数据库，并且使得一个或多个便携式依赖设备能够经由一个或多个可用信道进行无线通信。

公开(公告)号：WO2008061044A3

公开(公告)日：2008-07-10

申请号：PCT/US2007084369

申请日：2007-11-10

Applicant: QUALCOMM INC ,  SHELLHAMMER STEPHEN J

Inventor： SHELLHAMMER STEPHEN J

IPC: H04B1/46

CPC classification number: H04B1/46 ,  H04W4/18 ,  H04W24/00

Abstract: A method for detecting the presence of a transmission signal in a wireless spectrum channel. The frequency of a signal is converted from a first frequency to a second frequency. The signal with the second frequency is filtered to remove signals that are not within the band of the second frequency. An averaged periodogram of the signal is calculated. A value of the averaged periodogram is compared to a threshold. The presence of the transmission signal is detected, if the value of the averaged periodogram exceeds the threshold.

Abstract translation: 一种在无线频谱信道中检测发送信号的存在的方法。 信号的频率从第一频率转换为第二频率。 对具有第二频率的信号进行滤波以除去不在第二频率的频带内的信号。 计算信号的平均周期图。 将平均周期图的值与阈值进行比较。 如果平均周期图的值超过阈值，则检测到发送信号的存在。

公开(公告)号：EP2932661A4

公开(公告)日：2016-06-01

申请号：EP12890398

申请日：2012-12-17

Applicant: QUALCOMM INC

Inventor： NIE HONGER ,  HU XINYU ,  GARAVAGLIA ANDREA ,  SHELLHAMMER STEPHEN J ,  LI XUGUANG ,  STUPAR PATRICK ,  KO TIENCHUAN

IPC: H04L12/18 ,  H04B10/27 ,  H04L12/28 ,  H04Q11/00

CPC classification number: H04L12/18 ,  H04B10/27 ,  H04L12/1836 ,  H04L12/2885 ,  H04Q11/0071 ,  H04Q2011/0077

公开(公告)号：WO2010088578A3

公开(公告)日：2011-06-09

申请号：PCT/US2010022681

申请日：2010-01-31

Applicant: QUALCOMM INC ,  SADEK AHMED K ,  SHELLHAMMER STEPHEN J

Inventor： SADEK AHMED K ,  SHELLHAMMER STEPHEN J

IPC: H04L5/00 ,  H04W16/14

CPC classification number: H04L5/0033 ,  H04L5/0035 ,  H04W16/14 ,  H04W74/085

Abstract: Techniques for use in contending for a portion of a television channel spectrum are disclosed. In some instances, a back-off value is used to decide whether a contender's contention number will be transmitted when the contention channel is free, and the back-off value is determined based on the contention number. In some instances, a contender monitors the contention channel and withdraws from contention if it detects from the contention channel that a higher priority contender is in contention.

Abstract translation: 公开了用于竞争电视频道频谱的一部分的技术。 在某些情况下，使用退避值来决定竞争者的竞争号码是否在竞争信道是空闲时被发送，并且基于竞争号确定退避价值。 在某些情况下，如果竞争者从争用频道中检测到较高优​​先级的竞争者在争夺中，则竞争者监视争用通道并退出争用。

公开(公告)号：WO2011011558A2

公开(公告)日：2011-01-27

申请号：PCT/US2010042816

申请日：2010-07-21

Applicant: QUALCOMM INC ,  SHELLHAMMER STEPHEN J

Inventor： SHELLHAMMER STEPHEN J

IPC: H04B17/00

CPC classification number: H04W16/14 ,  H04B7/0837 ,  H04B17/26 ,  H04B17/382 ,  H04W72/085

Abstract: Methods and apparatus for sensing features of a signal in a wireless communication system are disclosed. The disclosed methods and apparatus sense signal features by determining a number of spectral density estimates, where each estimate is derived based on reception of the signal by a respective antenna in a system with multiple sensing antennas. The spectral density estimates are then combined, and the signal features are sensed based on the combination of the spectral density estimates.

Abstract translation: 公开了用于感测无线通信系统中的信号的特征的方法和设备。 所公开的方法和设备通过确定多个频谱密度估计来感测信号特征，其中每个估计是基于由具有多个感测天线的系统中的相应天线接收信号而导出的。 然后组合谱密度估计，并且基于谱密度估计的组合来感测信号特征。

公开(公告)号：WO2012112801A3

公开(公告)日：2012-12-27

申请号：PCT/US2012025495

申请日：2012-02-16

Applicant: QUALCOMM INC ,  ABRAHAM SANTOSH PAUL ,  VERMANI SAMEER ,  SAMPATH HEMANTH ,  SHELLHAMMER STEPHEN J ,  TANDRA RAHUL

Inventor： ABRAHAM SANTOSH PAUL ,  VERMANI SAMEER ,  SAMPATH HEMANTH ,  SHELLHAMMER STEPHEN J ,  TANDRA RAHUL

IPC: H04W52/08 ,  H04L1/00 ,  H04W52/24 ,  H04W52/36 ,  H04W52/50 ,  H04W74/08

CPC classification number: H04W52/04 ,  H04B7/12 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0027 ,  H04L1/06 ,  H04W16/14 ,  H04W52/325 ,  H04W52/367 ,  H04W74/0816

Abstract: Certain aspects of the present disclosure provide techniques and apparatus for managing transmit power in a television white space (TVWS) network. One example method generally includes transmitting a sequence of request-to-send (RTS) messages at different transmit power levels to an apparatus and determining if a clear-to-send (CTS) message was received in response to at least one of the RTS messages corresponding to a particular one of the transmit power levels. Another example method generally includes receiving, at a first apparatus from a second apparatus, a packet that cannot be decoded by the first apparatus; determining at least one of a time or a duration corresponding to the packet; transmitting a query with an indication of the at least one of the time or the duration; and receiving a message from the second apparatus in response to the query, the message identifying the second apparatus as a source of the packet.

Abstract translation: 本公开的某些方面提供了用于管理电视白色空间（TVWS）网络中的发射功率的技术和装置。 一个示例性方法通常包括以不同的发射功率电平发送请求发送（RTS）消息序列到设备，并且响应于RTS中的至少一个来确定是否接收到清除发送（CTS）消息 消息对应于特定的一个发射功率电平。 另一示例方法一般包括在第一装置处从第二装置接收不能被第一装置解码的分组; 确定对应于所述分组的时间或持续时间中的至少一个; 传送具有所述时间或所述持续时间中的所述至少一者的指示的查询; 以及响应于所述查询从所述第二装置接收消息，所述消息将所述第二装置标识为所述分组的源。

公开(公告)号：WO2011091405A3

公开(公告)日：2011-11-03

申请号：PCT/US2011022372

申请日：2011-01-25

Applicant: QUALCOMM INC ,  QUAN ZHI ,  SHELLHAMMER STEPHEN J ,  ZHANG WENYI

Inventor： QUAN ZHI ,  SHELLHAMMER STEPHEN J ,  ZHANG WENYI

IPC: H04L27/00

CPC classification number: H04L27/0006

Abstract: An apparatus for wireless communication includes a processing system. The processing system is configured to estimate a power spectral density of a first signal. In addition, the processing system is configured to determine a normalized correlation detector between the estimated power spectral density and a known power spectral density of a second signal. Furthermore, the processing system is configured to determine whether the first signal contains the second signal based on the normalized correlation detector.

Abstract translation: 一种用于无线通信的装置包括处理系统。 处理系统被配置为估计第一信号的功率谱密度。 此外，处理系统被配置为确定估计的功率谱密度和第二信号的已知功率谱密度之间的归一化相关检测器。 此外，处理系统被配置为基于归一化相关检测器来确定第一信号是否包含第二信号。