专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US08027373B2 Quick detection of signaling in a wireless communication system 有权
标题翻译：在无线通信系统中快速检测信令
公开(公告)号：US08027373B2
公开(公告)日：2011-09-27
申请号：US11228045
申请日：2005-09-15
申请人： Parvathanathan Subrahmanya , Thejaswi Bharadwaj Madapushi Sheshadri , Vivek Chawla
发明人： Parvathanathan Subrahmanya , Thejaswi Bharadwaj Madapushi Sheshadri , Vivek Chawla
IPC分类号： H04B1/00
CPC分类号： H04L27/2278 , H04B1/7085 , H04B2201/70709 , H04L2027/003 , H04L2027/0034 , H04L2027/0065 , H04W52/0229 , Y02D70/122 , Y02D70/1242 , Y02D70/166 , Y02D70/24 , Y02D70/40
摘要： Quick frequency tracking (QFT), quick time tracking (QTT), and non-causal pilot filtering (NCP) are used to detect sporadically transmitted signaling, e.g., paging indicators. For QFT, multiple hypothesized frequency errors are applied to an input signal to obtain multiple rotated signals. The energies of the rotated signals are computed. The hypothesized frequency error with the largest energy is provided as a frequency error estimate. For QTT, coherent accumulation is performed on the input signal for a first set of time offsets, e.g., early, on-time, and late. Interpolation, energy computation, and non-coherent accumulation are then performed to obtain a timing error estimate with higher time resolution. For NCP, pilot symbols are filtered with a non-causal filter to obtain pilot estimates for one antenna for non-STTD and for two antennas for STTD. The frequency and timing error estimates and the pilot estimates are used to detect the signaling.
摘要翻译：使用快速频率跟踪（QFT），快速时间跟踪（QTT）和非因果导频滤波（NCP）来检测偶发地发送的信令，例如寻呼指示符。对于QFT，将多个假设频率误差应用于输入信号以获得多个旋转信号。计算旋转信号的能量。提供具有最大能量的假设频率误差作为频率误差估计。对于QTT，对于第一组时间偏移的输入信号执行相干累加，例如早，时，晚。然后执行插值，能量计算和非相干累加，以获得具有更高时间分辨率的定时误差估计。对于NCP，使用非因果滤波器对导频符号进行滤波，以获得用于非STTD的一个天线和用于STTD的两个天线的导频估计。频率和定时误差估计和导频估计用于检测信令。

2. 发明申请

US20070060095A1 Quick detection of signaling in a wireless communication system 有权
标题翻译：在无线通信系统中快速检测信令
公开(公告)号：US20070060095A1
公开(公告)日：2007-03-15
申请号：US11228045
申请日：2005-09-15
申请人： Parvathanathan Subrahmanya , Thejaswi Bharadwaj Madapushi Sheshadri , Vivek Chawla
发明人： Parvathanathan Subrahmanya , Thejaswi Bharadwaj Madapushi Sheshadri , Vivek Chawla
IPC分类号： H04B1/16 , H04B1/38 , H04M1/00
CPC分类号： H04L27/2278 , H04B1/7085 , H04B2201/70709 , H04L2027/003 , H04L2027/0034 , H04L2027/0065 , H04W52/0229 , Y02D70/122 , Y02D70/1242 , Y02D70/166 , Y02D70/24 , Y02D70/40
摘要： Quick frequency tracking (QFT), quick time tracking (QTT), and non-causal pilot filtering (NCP) are used to detect sporadically transmitted signaling, e.g., paging indicators. For QFT, multiple hypothesized frequency errors are applied to an input signal to obtain multiple rotated signals. The energies of the rotated signals are computed. The hypothesized frequency error with the largest energy is provided as a frequency error estimate. For QTT, coherent accumulation is performed on the input signal for a first set of time offsets, e.g., early, on-time, and late. Interpolation, energy computation, and non-coherent accumulation are then performed to obtain a timing error estimate with higher time resolution. For NCP, pilot symbols are filtered with a non-causal filter to obtain pilot estimates for one antenna for non-STTD and for two antennas for STTD. The frequency and timing error estimates and the pilot estimates are used to detect the signaling.
摘要翻译：使用快速频率跟踪（QFT），快速时间跟踪（QTT）和非因果导频滤波（NCP）来检测偶发地发送的信令，例如寻呼指示符。对于QFT，将多个假设频率误差应用于输入信号以获得多个旋转信号。计算旋转信号的能量。提供具有最大能量的假设频率误差作为频率误差估计。对于QTT，对于第一组时间偏移的输入信号执行相干累加，例如早，时，晚。然后执行插值，能量计算和非相干累加，以获得具有更高时间分辨率的定时误差估计。对于NCP，使用非因果滤波器对导频符号进行滤波，以获得用于非STTD的一个天线和用于STTD的两个天线的导频估计。频率和定时误差估计和导频估计用于检测信令。

3. 发明授权

US08170084B2 Quick detection of signaling in a wireless communication system 有权
标题翻译：在无线通信系统中快速检测信令
公开(公告)号：US08170084B2
公开(公告)日：2012-05-01
申请号：US13216779
申请日：2011-08-24
申请人： Parvathanathan Subrahmanya , Thejaswi Bharadwaj Madapushi Sheshadri , Vivek Chawla
发明人： Parvathanathan Subrahmanya , Thejaswi Bharadwaj Madapushi Sheshadri , Vivek Chawla
IPC分类号： H04B1/00
CPC分类号： H04L27/2278 , H04B1/7085 , H04B2201/70709 , H04L2027/003 , H04L2027/0034 , H04L2027/0065 , H04W52/0229 , Y02D70/122 , Y02D70/1242 , Y02D70/166 , Y02D70/24 , Y02D70/40
摘要： Quick frequency tracking (QFT), quick time tracking (QTT), and non-causal pilot filtering (NCP) are used to detect sporadically transmitted signaling, e.g., paging indicators. For QFT, multiple hypothesized frequency errors are applied to an input signal to obtain multiple rotated signals. The energies of the rotated signals are computed. The hypothesized frequency error with the largest energy is provided as a frequency error estimate. For QTT, coherent accumulation is performed on the input signal for a first set of time offsets, e.g., early, on-time, and late. Interpolation, energy computation, and non-coherent accumulation are then performed to obtain a timing error estimate with higher time resolution. For NCP, pilot symbols are filtered with a non-causal filter to obtain pilot estimates for one antenna for non-STTD and for two antennas for STTD. The frequency and timing error estimates and the pilot estimates are used to detect the signaling.
摘要翻译：使用快速频率跟踪（QFT），快速时间跟踪（QTT）和非因果导频滤波（NCP）来检测偶发地发送的信令，例如寻呼指示符。对于QFT，将多个假设频率误差应用于输入信号以获得多个旋转信号。计算旋转信号的能量。提供具有最大能量的假设频率误差作为频率误差估计。对于QTT，对于第一组时间偏移的输入信号执行相干累加，例如早，时，晚。然后执行插值，能量计算和非相干累加，以获得具有更高时间分辨率的定时误差估计。对于NCP，使用非因果滤波器对导频符号进行滤波，以获得用于非STTD的一个天线和用于STTD的两个天线的导频估计。频率和定时误差估计和导频估计用于检测信令。

4. 发明申请

US20110306315A1 Quick Detection of signaling in a Wireless Communication System 有权
标题翻译：无线通信系统中信令的快速检测
公开(公告)号：US20110306315A1
公开(公告)日：2011-12-15
申请号：US13216779
申请日：2011-08-24
申请人： Parvathanathan Subrahmanya , Thejaswi Bharadwaj Madapushi Sheshadri , Vivek Chawla
发明人： Parvathanathan Subrahmanya , Thejaswi Bharadwaj Madapushi Sheshadri , Vivek Chawla
IPC分类号： H04B17/00
CPC分类号： H04L27/2278 , H04B1/7085 , H04B2201/70709 , H04L2027/003 , H04L2027/0034 , H04L2027/0065 , H04W52/0229 , Y02D70/122 , Y02D70/1242 , Y02D70/166 , Y02D70/24 , Y02D70/40
摘要： Quick frequency tracking (QFT), quick time tracking (QTT), and non-causal pilot filtering (NCP) are used to detect sporadically transmitted signaling, e.g., paging indicators. For QFT, multiple hypothesized frequency errors are applied to an input signal to obtain multiple rotated signals. The energies of the rotated signals are computed. The hypothesized frequency error with the largest energy is provided as a frequency error estimate. For QTT, coherent accumulation is performed on the input signal for a first set of time offsets, e.g., early, on-time, and late. Interpolation, energy computation, and non-coherent accumulation are then performed to obtain a timing error estimate with higher time resolution. For NCP, pilot symbols are filtered with a non-causal filter to obtain pilot estimates for one antenna for non-STTD and for two antennas for STTD. The frequency and timing error estimates and the pilot estimates are used to detect the signaling.
摘要翻译：使用快速频率跟踪（QFT），快速时间跟踪（QTT）和非因果导频滤波（NCP）来检测偶发地发送的信令，例如寻呼指示符。对于QFT，将多个假设频率误差应用于输入信号以获得多个旋转信号。计算旋转信号的能量。提供具有最大能量的假设频率误差作为频率误差估计。对于QTT，对于第一组时间偏移的输入信号执行相干累加，例如早，时，晚。然后执行插值，能量计算和非相干累加，以获得具有更高时间分辨率的定时误差估计。对于NCP，使用非因果滤波器对导频符号进行滤波，以获得用于非STTD的一个天线和用于STTD的两个天线的导频估计。频率和定时误差估计和导频估计用于检测信令。

5. 发明授权

US08369255B2 Uniform out-of-service search for wireless communication systems 有权
标题翻译：无线通信系统的统一无服务搜索
公开(公告)号：US08369255B2
公开(公告)日：2013-02-05
申请号：US12447010
申请日：2007-10-25
申请人： Bhupesh Manoharlal Umatt , Vineet Mittal , Vivek Chawla
发明人： Bhupesh Manoharlal Umatt , Vineet Mittal , Vivek Chawla
IPC分类号： G08C17/00
CPC分类号： H04W52/0241 , H04W48/16 , Y02D70/122 , Y02D70/1242 , Y02D70/1262
摘要： Techniques for performing uniform out-of-service (UOOS) search to detect for wireless systems are described. The UOOS search is “uniform” in that sleep cycle and/or awake period are fixed. A wireless device transitions to an OOS state upon detection of OOS conditions for a radio access technology (RAT). The wireless device performs system search during the awake period of each sleep cycle while in the OOS state. The awake period may have a first fixed time duration, and the sleep cycle may have a second fixed time duration. In each awake period, the wireless device may either start a new search or resume a prior search based on saved state information if the search was not completed in a prior awake period. In each awake period, the wireless device may (i) start and complete a search for recently acquired frequency channels and systems and (ii) start or resume a search for other frequency channels and systems in one or more RATs.
摘要翻译：描述了执行统一的无服务（UOOS）搜索以检测无线系统的技术。 UOOS搜索在该睡眠周期中是一致的，和/或清醒期是固定的。检测到无线电接入技术（RAT）的OOS条件时，无线设备转换到OOS状态。无线设备在处于OOS状态的每个休眠周期的唤醒期间执行系统搜索。清醒周期可以具有第一固定持续时间，并且睡眠周期可以具有第二固定持续时间。在每个清醒周期中，如果在之前的清醒周期中没有完成搜索，则无线设备可以基于保存的状态信息来开始新的搜索或恢复先前的搜索。在每个清醒周期中，无线设备可以（i）开始并完成对最近获取的频道和系统的搜索，以及（ii）开始或继续搜索一个或多个RAT中的其他频道和系统。

6. 发明授权

US09125154B2 Method and apparatus for reducing power consumption of simultaneous receivers in a wireless communications device 有权
标题翻译：一种用于降低无线通信设备中同时接收机的功耗的方法和装置
公开(公告)号：US09125154B2
公开(公告)日：2015-09-01
申请号：US13585612
申请日：2012-08-14
申请人： Vivek Chawla , Shuqing Xing
发明人： Vivek Chawla , Shuqing Xing
IPC分类号： H04M1/00 , H04W52/02 , H04W88/06
CPC分类号： H04W52/0209 , H04W52/0229 , H04W52/0258 , H04W88/06 , Y02D70/122 , Y02D70/1242 , Y02D70/1262 , Y02D70/142 , Y02D70/20
摘要： A method for power management for use in system selection by simultaneous receivers taking into account power use during an idle state. A power penalty is determined for each of a plurality of wireless technology systems available to a receiver when conducting page monitoring sequences. Combined power penalties are determined for various combinations of wireless technology systems. Wireless technology systems are selected in a preferred combination having a least combined power penalty for monitoring pages during an idle mode.
摘要翻译：一种用于在空闲状态下考虑功率使用的同时接收机在系统选择中使用的电力管理方法。当进行页面监视序列时，为接收机可用的多个无线技术系统中的每一个确定功率损失。为无线技术系统的各种组合确定组合的功率惩罚。在空闲模式期间以对监视页面具有最小组合功率损失的优选组合来选择无线技术系统。

7. 发明申请

US20090131047A1 METHOD AND APPARATUS FOR REDUCING FREQUENCY SPACE FROM FREQUENCY SEARCH 有权
标题翻译：从频率搜索中减少频率空间的方法和装置
公开(公告)号：US20090131047A1
公开(公告)日：2009-05-21
申请号：US12212064
申请日：2008-09-17
申请人： Messay Amerga , Vivek Chawla , Deepali Garg
发明人： Messay Amerga , Vivek Chawla , Deepali Garg
IPC分类号： H04W4/00
CPC分类号： H04W48/16 , H04W52/0229 , Y02D70/1222 , Y02D70/1242 , Y02D70/1262 , Y02D70/142 , Y02D70/146 , Y02D70/24
摘要： A method and apparatus for reducing frequency space from code space search is disclosed in a wireless network. The method and apparatus reduces the frequency space without compromising the probability of detection, so that user equipment can expedite system acquisition and reduce power consumption. To reduce the frequency space, the described aspects note that the power spectral density of the WCDMA signal is essentially flat within the channel bandwidth. By capturing in-phase quadrature samples and doing frequency domain analysis of the signal in bandwidth around the center frequency, to the described aspects can eliminate some channels from the WCDMA code space search during frequency scan.
摘要翻译：在无线网络中公开了一种用于从代码空间搜索减少频率空间的方法和装置。该方法和装置降低了频率空间，而不损害检测的概率，使得用户设备可以加快系统采集并降低功耗。为了降低频率空间，所描述的方面注意到WCDMA信号的功率谱密度在信道带宽内基本上是平坦的。通过捕获同相正交采样并对围绕中心频率的带宽中的信号进行频域分析，所描述的方面可以在频率扫描期间从WCDMA码空间搜索中消除一些信道。

8. 发明申请

US20080117959A1 FALSE ALARM REDUCTION IN DETECTION OF A SYNCHRONIZATION SIGNAL 审中-公开
标题翻译：在同步信号检测中的减少报警
公开(公告)号：US20080117959A1
公开(公告)日：2008-05-22
申请号：US11937313
申请日：2007-11-08
申请人： Parvanthanathan Subrahmanya , Vivek Chawla , Deepali Garg
发明人： Parvanthanathan Subrahmanya , Vivek Chawla , Deepali Garg
IPC分类号： H04B15/00 , H04B3/46
CPC分类号： H04L25/03159 , H04B1/71 , H04L25/022
摘要： Techniques for selectively filtering a received signal in order to reduce false alarms in the detection of a synchronization signal are described. In one design, frequency characteristics of a received signal may be estimated. Large spectral peaks in the estimated frequency characteristics may be detected. Filter coefficients for a pseudo-whitening filter may then be derived based on the detected large spectral peaks. To derive these filter coefficients, a filter gain for each of multiple frequency bins may be set to a predetermined value if a large spectral peak is not detected or a value inversely related to the large spectral peak if detected. The filter gains for all frequency bins may be transformed to time domain and further processed to obtain the filter coefficients. The received signal may be filtered based on the filter coefficients to attenuate the large spectral peaks. The filtered signal may be processed to detect for the synchronization signal.
摘要翻译：描述了用于选择性地过滤接收到的信号以减少在同步信号的检测中的假警报的技术。在一种设计中，可以估计接收信号的频率特性。可以检测估计的频率特性中的大的频谱峰值。然后可以基于检测到的大光谱峰值导出伪白化滤波器的滤波器系数。为了导出这些滤波器系数，如果没有检测到大的频谱峰值，或者如果检测到与大频谱峰值成反比的值，则可以将多个频率仓中的每一个的滤波器增益设置为预定值。所有频率仓的滤波器增益可以被变换到时域并被进一步处理以获得滤波器系数。可以基于滤波器系数对接收到的信号进行滤波以衰减大的频谱峰值。可以处理经滤波的信号以检测同步信号。

9. 发明授权

US08145132B2 Method and apparatus for reducing frequency space from frequency search 有权
标题翻译：从频率搜索中减少频率空间的方法和装置
公开(公告)号：US08145132B2
公开(公告)日：2012-03-27
申请号：US12212064
申请日：2008-09-17
申请人： Messay Amerga , Vivek Chawla , Deepali Garg
发明人： Messay Amerga , Vivek Chawla , Deepali Garg
IPC分类号： H04B15/00 , H04B17/00
CPC分类号： H04W48/16 , H04W52/0229 , Y02D70/1222 , Y02D70/1242 , Y02D70/1262 , Y02D70/142 , Y02D70/146 , Y02D70/24
摘要： A method and apparatus for reducing frequency space from code space search is disclosed in a wireless network. The method and apparatus reduces the frequency space without compromising the probability of detection, so that user equipment can expedite system acquisition and reduce power consumption. To reduce the frequency space, the described aspects note that the power spectral density of the WCDMA signal is essentially flat within the channel bandwidth. By capturing in-phase quadrature samples and doing frequency domain analysis of the signal in bandwidth around the center frequency, to the described aspects can eliminate some channels from the WCDMA code space search during frequency scan.
摘要翻译：在无线网络中公开了一种用于从代码空间搜索减少频率空间的方法和装置。该方法和装置降低了频率空间，而不损害检测的概率，使得用户设备可以加快系统采集并降低功耗。为了降低频率空间，所描述的方面注意到WCDMA信号的功率谱密度在信道带宽内基本上是平坦的。通过捕获同相正交采样并对围绕中心频率的带宽中的信号进行频域分析，所描述的方面可以在频率扫描期间从WCDMA码空间搜索中消除一些信道。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式