公开(公告)号：US06760573B2

公开(公告)日：2004-07-06

申请号：US10261976

申请日：2002-10-01

申请人： Parvathanathan Subrahmanya ,  Jeremy H. Lin

发明人： Parvathanathan Subrahmanya ,  Jeremy H. Lin

IPC分类号： H04B118

CPC分类号： H04B1/712

摘要： Techniques for inner/outer loop tracking that is stable and provides desirable loop convergence characteristics are disclosed. In one aspect, the contribution from any one inner loop to the tracking function of the outer loop is limited, to prohibit any one received signal component from dominating the outer loop. In another aspect, the rate of outer loop tracking variation is controlled to provide inner and outer loop stability. Various other aspects are also presented. These aspects have the benefit of providing stable inner and outer loop control, as well as efficient convergence and tracking by the various loops, resulting in reduced frequency error and improved communication performance.

公开(公告)号：US08576965B2

公开(公告)日：2013-11-05

申请号：US12831462

申请日：2010-07-07

申请人： Madihally J. Narasimha ,  Je Woo Kim ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

发明人： Madihally J. Narasimha ,  Je Woo Kim ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

IPC分类号： H04B1/10

CPC分类号： H04B1/525 ,  G01S19/21 ,  H04B1/3805 ,  H04B1/406

摘要： Certain embodiments of the present disclosure support techniques for interference cancellation in a multi-mode wireless modem that supports coexistence of different radio technologies.

摘要翻译： 本公开的某些实施例支持支持不同无线电技术共存的多模式无线调制解调器中的干扰消除技术。

公开(公告)号：US08155676B2

公开(公告)日：2012-04-10

申请号：US12717891

申请日：2010-03-04

申请人： Parvathanathan Subrahmanya

发明人： Parvathanathan Subrahmanya

IPC分类号： H04W68/00

CPC分类号： H04W68/00 ,  H04W52/0216 ,  Y02D70/00

摘要： A wireless communications network (120) responds to each incoming call placed to a wireless communications device (134) by transmitting a call-paging message (418) within a corresponding partition of a digital radio frame of prescribed format. Responsive to each occurrence of a broadcast event (404), the network transmits (414) a repeating broadcast-paging message announcing the availability of broadcast content from the network. The broadcast-paging message is transmitted multiple times within each digital radio frame. Another sequence (500) describes WCD operation in this network. Responsive to wakeup (502) from sleep, the WCD detects (509) received signal quality. The WCD also receives (510) scheduled network transmission of a call-paging message and a number of instances (at least one) of a repeating network transmitted broadcast-paging message that occurs multiple times for each scheduled transmission of the call-paging message. This number varies inversely with the detected signal quality.

摘要翻译： 无线通信网络（120）通过在规定格式的数字无线电帧的相应分区内发送呼叫寻呼消息（418）来响应放置到无线通信设备（134）的每个呼入呼叫。 响应于广播事件的每次发生（404），网络发送（414）重播广播 - 寻呼消息，通知广播内容的可用性。 在每个数字无线电帧内广播 - 寻呼消息被多次发送。 另一个序列（500）描述了该网络中的WCD操作。 响应唤醒（502）从睡眠，WCD检测（509）接收信号质量。 WCD还接收（510）呼叫寻呼消息的调度网络传输和针对呼叫寻呼消息的每个调度传输多次发生的重复网络发送的广播寻呼消息的多个实例（至少一个）。 该数字与检测到的信号质量成反比。

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。

公开(公告)号：US20110103431A1

公开(公告)日：2011-05-05

申请号：US12831462

申请日：2010-07-07

申请人： Madihally J. Narasimha ,  Je Woo Kim ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

发明人： Madihally J. Narasimha ,  Je Woo Kim ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

IPC分类号： H04B1/10 ,  H04B1/707

CPC分类号： H04B1/525 ,  G01S19/21 ,  H04B1/3805 ,  H04B1/406

摘要： Certain embodiments of the present disclosure support techniques for interference cancellation in a multi-mode wireless modem that supports coexistence of different radio technologies.

摘要翻译： 本公开的某些实施例支持支持不同无线电技术共存的多模式无线调制解调器中的干扰消除技术。

公开(公告)号：US07899480B2

公开(公告)日：2011-03-01

申请号：US11217242

申请日：2005-08-31

申请人： Erumusele O. Odigie ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

发明人： Erumusele O. Odigie ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

IPC分类号： H04B7/00

CPC分类号： H04W52/221 ,  H04W52/223 ,  H04W52/267 ,  H04W52/346 ,  H04W52/367 ,  Y02D70/124

摘要： An apparatus, system, and method efficiently manage transmission power in a user equipment (UE) device by maintaining and applying an authorized power level to determine a transmission power level after a power limited transmission and before a new power control command has been received. The UE device maintains the authorized power level by monitoring and adjusting the authorized power level based on received power control commands. After a power limited transmission where the maximum power level is less than the authorized power level, the UE device determines the transmission power level for the next transmission based on the authorized power level. Accordingly, after the power limiting situation has ceased, the UE device transmits at the optimum power level eliminating the inefficiencies of transmitting at a lower than authorized power before the next power control command is received.

摘要翻译： 一种装置，系统和方法通过维持和应用授权功率电平来有效地管理用户设备（UE）设备中的发射功率，以确定在功率限制传输之后和在接收到新的功率控制命令之前的发射功率电平。 UE设备通过基于接收到的功率控制命令监视和调整授权功率电平来维持授权功率电平。 在最大功率电平小于授权功率电平的功率限制传输之后，UE设备基于授权功率电平确定用于下一次传输的传输功率电平。 因此，在功率限制情况已经停止之后，UE接收到下一个功率控制命令之前，以最佳功率电平发送消除低于授权功率的低效发送的低效率。

公开(公告)号：US20100184455A1

公开(公告)日：2010-07-22

申请号：US12717891

申请日：2010-03-04

申请人： Parvathanathan Subrahmanya

发明人： Parvathanathan Subrahmanya

IPC分类号： H04W68/02 ,  H04W52/02 ,  H04W88/12

CPC分类号： H04W68/00 ,  H04W52/0216 ,  Y02D70/00

摘要： A wireless communications network (120) responds to each incoming call placed to a wireless communications device (134) by transmitting a call-paging message (418) within a corresponding partition of a digital radio frame of prescribed format. Responsive to each occurrence of a broadcast event (404), the network transmits (414) a repeating broadcast-paging message announcing the availability of broadcast content from the network. The broadcast-paging message is transmitted multiple times within each digital radio frame. Another sequence (500) describes WCD operation in this network. Responsive to wakeup (502) from sleep, the WCD detects (509) received signal quality. The WCD also receives (510) scheduled network transmission of a call-paging message and a number of instances (at least one) of a repeating network transmitted broadcast-paging message that occurs multiple times for each scheduled transmission of the call-paging message. This number varies inversely with the detected signal quality.

摘要翻译： 无线通信网络（120）通过在规定格式的数字无线电帧的相应分区内发送呼叫寻呼消息（418）来响应放置到无线通信设备（134）的每个呼入呼叫。 响应于广播事件的每次发生（404），网络发送（414）重播广播 - 寻呼消息，通知广播内容的可用性。 在每个数字无线电帧内广播 - 寻呼消息被多次发送。 另一个序列（500）描述了该网络中的WCD操作。 响应唤醒（502）从睡眠，WCD检测（509）接收信号质量。 WCD还接收（510）呼叫寻呼消息的调度网络传输和针对呼叫寻呼消息的每个调度传输多次发生的重复网络发送的广播寻呼消息的多个实例（至少一个）。 该数字与检测到的信号质量成反比。

公开(公告)号：US07693241B2

公开(公告)日：2010-04-06

申请号：US11392316

申请日：2006-03-28

申请人： Thejaswi Bharadwaj Madapushi Sheshadri ,  Brian Dong ,  Messay Amerga ,  Chih-Ping Hsu ,  Parvathanathan Subrahmanya ,  Xiaoming Zhu

发明人： Thejaswi Bharadwaj Madapushi Sheshadri ,  Brian Dong ,  Messay Amerga ,  Chih-Ping Hsu ,  Parvathanathan Subrahmanya ,  Xiaoming Zhu

IPC分类号： H04L1/00 ,  H04B1/69 ,  H04B7/216

CPC分类号： H04B1/7117 ,  B60L2200/26

摘要： A rake receiver finger assignor is configured to assign a rake receiver finger to a time offset between identified signal path time offsets in accordance with a concentration of identified signal paths from a transmitter to a rake receiver. In accordance with the exemplary embodiment, a number of identified signal paths having time offsets within a time window are observed to determine the concentration of signal paths identified by a path searcher. If the number of identified signal paths indicates a concentrated distribution of signal paths such as during a fat path condition, at least one rake finger is assigned between at a time offset between two identified signal paths.

摘要翻译： 耙式接收器手指分配器被配置为根据从发射机到耙式接收机的识别的信号路径的浓度，将耙机接收机手指分配到所识别的信号路径时间偏移之间的时间偏移。 根据示例性实施例，观察到在时间窗内具有时间偏移的多个识别的信号路径，以确定由路径搜索器识别的信号路径的浓度。 如果所识别的信号路径的数量表示信号路径的集中分布，例如在脂肪路径条件期间，则在两个识别的信号路径之间的时间偏移处分配至少一个耙指。

公开(公告)号：US07583756B2

公开(公告)日：2009-09-01

申请号：US11761329

申请日：2007-06-11

申请人： Parvathanathan Subrahmanya ,  Da-shan Shiu ,  Avneesh Agrawal

发明人： Parvathanathan Subrahmanya ,  Da-shan Shiu ,  Avneesh Agrawal

IPC分类号： H04L27/00 ,  H04B1/10 ,  H04L23/00

CPC分类号： H04L25/0228 ,  H04B1/7117 ,  H04B2201/70701 ,  H04L25/0214

摘要： Techniques to filter pilot symbols for a pilot in an “adaptive” manner to provide an improved estimate of the response of a communication channel. A received signal may experience different channel conditions at different times, and different multipaths may also experience different channel conditions even when received close in time. A pilot filter with an adaptive response is used to provide an improved estimate of the channel response. Various adaptive pilot filtering schemes may be used. In a first scheme, the channel conditions are estimated based on the quality of the received pilot. In a second scheme, the channel conditions are estimated based on the quality of the pilot estimates (i.e., the filtered pilot symbols). For each scheme, a particular filter response is selected based on the estimated quality of either the received pilot or the pilot estimates.

摘要翻译： 用于以“自适应”方式滤波导频的导频符号以提供对通信信道的响应的改进估计的技术。 接收到的信号可能在不同时间经历不同的信道条件，即使在接收时间短的情况下，不同的多路径也可能经历不同的信道条件。 使用具有自适应响应的导频滤波器来提供信道响应的改进的估计。 可以使用各种自适应导频滤波方案。 在第一方案中，基于接收到的导频的质量来估计信道条件。 在第二方案中，基于导频估计的质量（即，滤波的导频符号）来估计信道条件。 对于每个方案，基于所接收的导频或导频估计的估计质量来选择特定的滤波器响应。

公开(公告)号：US20080310321A1

公开(公告)日：2008-12-18

申请号：US12196489

申请日：2008-08-22

申请人： Francesco Grilli ,  Charles E. Wheatley, III ,  Serge Willenegger ,  Parvathanathan Subrahmanya

发明人： Francesco Grilli ,  Charles E. Wheatley, III ,  Serge Willenegger ,  Parvathanathan Subrahmanya

IPC分类号： H04B7/26 ,  H04B7/216 ,  G08C15/00

CPC分类号： H04W56/002 ,  H04B7/2668 ,  H04B2201/70702 ,  H04W56/001 ,  H04W56/0015 ,  H04W56/0045 ,  H04W92/20

摘要： Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).

摘要翻译： 将来自多个基站的传输时间对齐到终端的方案。 为了实现时间对准，确定在终端观察到的来自基站的传输的到达时间之间的差异，并将其提供给系统，并用于调整基站处的定时，使得终端专用无线帧到达 终端在特定的时间窗口内。 在一个方案中，两个基站之间的时差被划分为帧级时间差和码片级时间差。 无论何时请求执行和报告时差测量，终端测量每个候选基站相对于参考基站的芯片级定时。 此外，终端还测量帧级定时，并且仅在需要时在时差测量中包括该信息。 否则，终端将帧级部分设置为预定值（例如，零）。