公开(公告)号：US08879514B2

公开(公告)日：2014-11-04

申请号：US13619157

申请日：2012-09-14

申请人： Sharad Deepak Sambhwani ,  Sony J. Akkarakaran ,  Nitin Kasturi ,  Shashank V. Maiya ,  Wei Zhang ,  Prashant Udupa Sripathi

发明人： Sharad Deepak Sambhwani ,  Sony J. Akkarakaran ,  Nitin Kasturi ,  Shashank V. Maiya ,  Wei Zhang ,  Prashant Udupa Sripathi

IPC分类号： H04B7/216 ,  H04W52/02

CPC分类号： H04W52/0238 ,  Y02D70/1224 ,  Y02D70/1226 ,  Y02D70/1242 ,  Y02D70/1244 ,  Y02D70/1246 ,  Y02D70/1262 ,  Y02D70/1264 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/164 ,  Y02D70/25

摘要： Apparatus and methods for wireless communication that includes measuring energy on a first path metric and second path metric, comparing the energy on the first path metric and second path metric to a predetermined threshold and determining if Dedicated Control Channel (DCCH) energy is present.

摘要翻译： 用于无线通信的设备和方法包括测量第一路径度量和第二路径度量上的能量，将第一路径度量和第二路径度量上的能量与预定阈值进行比较，并确定是否存在专用控制信道（DCCH）能量。

公开(公告)号：US08406359B2

公开(公告)日：2013-03-26

申请号：US12712907

申请日：2010-02-25

申请人： Gokhan Mergen ,  Parvathanathan Subrahmanya ,  Vijayaraj Alilaghatta-Kantharaj ,  Nitin Kasturi

发明人： Gokhan Mergen ,  Parvathanathan Subrahmanya ,  Vijayaraj Alilaghatta-Kantharaj ,  Nitin Kasturi

IPC分类号： H04B1/10

CPC分类号： H04L25/025 ,  H04B17/3913 ,  H04B2201/70701 ,  H04L25/0212 ,  H04L25/0228 ,  H04L25/03038

摘要： Techniques for filtering noisy estimates to reduce estimation errors are described. A sequence of input values (e.g., for an initial channel impulse response estimate (CIRE)) is filtered with an infinite impulse response (IIR) filter having at least one coefficient to obtain a sequence of output values (e.g., for a filtered CIRE). The coefficient(s) are updated based on the sequence of input values with an adaptive filter, a bank of prediction filters, or a normalized variation technique. To update the coefficient(s) with the adaptive filter, a sequence of predicted values is derived based on the sequence of input values. Prediction errors between the sequence of predicted values and the sequence of input values are determined and filtered to obtain filtered prediction errors. The coefficient(s) of the IIR filter are then updated based on the prediction errors and the filtered prediction errors.

摘要翻译： 描述了用于过滤噪声估计以减少估计误差的技术。 输入值的序列（例如，对于初始信道脉冲响应估计（CIRE））用具有至少一个系数的无限脉冲响应（IIR）滤波器进行滤波以获得输出值序列（例如，对于滤波后的CIRE） 。 基于具有自适应滤波器，预测滤波器组或归一化变化技术的输入值的序列来更新系数。 为了用自适应滤波器更新系数，基于输入值的序列导出预测值序列。 确定并过滤预测值序列与输入值序列之间的预测误差，以获得滤波预测误差。 然后基于预测误差和滤波预测误差来更新IIR滤波器的系数。

公开(公告)号：US20110105037A1

公开(公告)日：2011-05-05

申请号：US12831474

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： H04B15/00

CPC分类号： H04B1/525 ,  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.

公开(公告)号：US07746970B2

公开(公告)日：2010-06-29

申请号：US11489087

申请日：2006-07-18

申请人： Gokhan Mergen ,  Parvathanathan Subrahmanya ,  Vijayaraj Alilaghatta-Kantharaj ,  Nitin Kasturi

发明人： Gokhan Mergen ,  Parvathanathan Subrahmanya ,  Vijayaraj Alilaghatta-Kantharaj ,  Nitin Kasturi

IPC分类号： H04B1/10

CPC分类号： H04L25/025 ,  H04B17/3913 ,  H04B2201/70701 ,  H04L25/0212 ,  H04L25/0228 ,  H04L25/03038

摘要： Techniques for filtering noisy estimates to reduce estimation errors are described. A sequence of input values (e.g., for an initial channel impulse response estimate (CIRE)) is filtered with an infinite impulse response (IIR) filter having at least one coefficient to obtain a sequence of output values (e.g., for a filtered CIRE). The coefficient(s) are updated based on the sequence of input values with an adaptive filter, a bank of prediction filters, or a normalized variation technique. To update the coefficient(s) with the adaptive filter, a sequence of predicted values is derived based on the sequence of input values. Prediction errors between the sequence of predicted values and the sequence of input values are determined and filtered to obtain filtered prediction errors. The coefficient(s) of the IIR filter are then updated based on the prediction errors and the filtered prediction errors.

摘要翻译： 描述了用于过滤噪声估计以减少估计误差的技术。 输入值的序列（例如，对于初始信道脉冲响应估计（CIRE））用具有至少一个系数的无限脉冲响应（IIR）滤波器进行滤波以获得输出值序列（例如，对于滤波后的CIRE） 。 基于具有自适应滤波器，预测滤波器组或归一化变化技术的输入值的序列来更新系数。 为了用自适应滤波器更新系数，基于输入值的序列导出预测值序列。 确定并过滤预测值序列与输入值序列之间的预测误差，以获得滤波预测误差。 然后基于预测误差和滤波预测误差来更新IIR滤波器的系数。

公开(公告)号：US07675962B2

公开(公告)日：2010-03-09

申请号：US11399886

申请日：2006-04-07

申请人： Gokhan Mergen ,  Vignesh Suthuraman ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

发明人： Gokhan Mergen ,  Vignesh Suthuraman ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

IPC分类号： H04B1/00

CPC分类号： H04L25/0216 ,  H04L25/0218

摘要： Techniques for deriving a channel impulse response estimate (CIRE) having improved quality are described. A first CIRE with multiple channel taps is obtained based on (1) an initial CIRE derived from a received pilot or (2) a filtered CIRE derived from the initial CIRE. In one aspect, the channel taps in the first CIRE are scaled with multiple scaling factors to obtain a second CIRE. For point-wise LMMSE scaling, the energy of each channel tap is estimated. The noise energy for the channel taps is also estimated, e.g., based on energies of channel taps on one or both edges of the first CIRE. Each channel tap is scaled based on a scaling factor determined by the energy of that channel tap and the noise energy. Each channel tap with energy below a threshold may be set to zero. In another aspect, the second CIRE is obtained by zeroing out selected ones of the channel taps in the first CIRE.

摘要翻译： 描述了用于导出具有改进的质量的信道脉冲响应估计（CIRE）的技术。 基于（1）从接收到的导频导出的初始CIRE或（2）从初始CIRE导出的滤波CIRE，获得具有多信道抽头的第一CIRE。 在一个方面，第一CIRE中的信道抽头被多个缩放因子缩放以获得第二CIRE。 对于逐点LMMSE缩放，估计每个通道抽头的能量。 也可以例如基于第一CIRE的一个或两个边缘上的信道抽头的能量来估计信道抽头的噪声能量。 每个通道抽头基于由该通道抽头的能量和噪声能量确定的缩放因子进行缩放。 能量低于阈值的每个通道抽头可以设置为零。 在另一方面，第二CIRE是通过对第一CIRE中的选通的信道抽头进行归零而获得的。

公开(公告)号：US07363010B2

公开(公告)日：2008-04-22

申请号：US10827143

申请日：2004-04-15

申请人： Hyukjun Oh ,  Parvathanathan Subrahmanya ,  Nitin Kasturi

发明人： Hyukjun Oh ,  Parvathanathan Subrahmanya ,  Nitin Kasturi

IPC分类号： H04B17/00

CPC分类号： H04W52/12 ,  H04W52/28

摘要： Techniques for controlling transmit power for a data transmission sent on multiple data channels, which may be intermittently active, are described. Each data channel is monitored for activity (e.g., based on an error correction code, received signaling information, received block energy, and so on) and deemed to be dormant or not dormant (e.g., based on the amount of elapsed time since activity was last detected on the data channel). A signal quality (SIR) target may be maintained for each non-dormant data channel and updated based on the status of received data blocks for the data channel. A final SIR target, used for power control of the data transmission, may be set to the highest SIR target among the SIR targets for the non-dormant data channels. The final SIR target may also be updated directly based on the status of received data blocks for the non-dormant data channels.

摘要翻译： 描述了用于控制在可能间歇地活动的多个数据信道上发送的数据传输的发送功率的技术。 监视每个数据信道的活动（例如，基于纠错码，接收的信令信息，接收到的块能量等等），并被认为是休眠或不休眠（例如，基于从活动以来的经过时间量 最后在数据通道上检测到）。 可以为每个非休眠数据信道维持信号质量（SIR）目标，并且基于数据信道的接收数据块的状态来更新。 可以将用于数据传输的功率控制的最终SIR目标设置为非休眠数据信道的SIR目标中的最高SIR目标。 也可以基于非休眠数据信道的接收数据块的状态来直接更新最终SIR目标。

公开(公告)号：US07012911B2

公开(公告)日：2006-03-14

申请号：US09871563

申请日：2001-05-31

申请人： Nitin Kasturi ,  Rajat Rajinderkumar Dhawan ,  Daisuke Terasawa ,  Avneesh Agrawal ,  Arak Sutivong

发明人： Nitin Kasturi ,  Rajat Rajinderkumar Dhawan ,  Daisuke Terasawa ,  Avneesh Agrawal ,  Arak Sutivong

IPC分类号： H04B7/20 ,  H04J3/02 ,  H04Q7/00

CPC分类号： H04L1/0071 ,  H04J13/00 ,  H04L1/0041 ,  H04L1/0065 ,  H04L1/08

摘要： Techniques for efficient W-CDMA modulation are disclosed. In one aspect, a multiplexing/coding chain for use in modulation such as that defined by the W-CDMA specification is disclosed. In another aspect, transport blocks are processed and concatenated, utilizing memory efficiently. This aspect has the further benefit of preparing transport channels for efficient subsequent processing. It also allows for ease of interface with the transport channel source. In another aspect, the use of repeated channel coding is used in lieu of an interleaver memory to provide channel coding and interleaving. These aspects, collectively, yield the advanced benefits of a system, such as W-CDMA, in a hardware efficient manner. The techniques described herein apply equally to both access points and access terminals. The techniques are not limited to W-CDMA systems; they are quite suitable to other systems requiring the various benefits the invention offers. Various other aspects of the invention are also presented.

公开(公告)号：US08359060B2

公开(公告)日：2013-01-22

申请号：US13036877

申请日：2011-02-28

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：US07966032B2

公开(公告)日：2011-06-21

申请号：US11264950

申请日：2005-11-01

申请人： Richard Chi ,  Da-Shan Shiu ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

发明人： Richard Chi ,  Da-Shan Shiu ,  Nitin Kasturi ,  Parvathanathan Subrahmanya

IPC分类号： H04Q7/20

CPC分类号： H04W52/228 ,  H04W52/12 ,  H04W52/20 ,  H04W52/221 ,  H04W52/24 ,  H04W52/241 ,  H04W52/248 ,  H04W52/36

摘要： Techniques for power control that avoids outer loop wind-up are disclosed. In one aspect, wind-up of a target power level is detected, and the target power level is modified in response. In another aspect, unwinding of the target power level is detected, after which the target power level is determined without considering wind-up. Various other aspects are also presented, including wind-up and unwinding detection procedures, and target power level modification procedures. These aspects have the benefit of reducing the time that transmit power exceeds that which is necessary, thus increasing system capacity and performance, and mitigating misallocation of system resources.

摘要翻译： 公开了避免外圈卷绕的功率控制技术。 在一个方面，检测目标功率电平的上升，并且响应地改变目标功率电平。 在另一方面，检测目标功率电平的展开，之后在不考虑卷绕的情况下确定目标功率电平。 还提出了各种其他方面，包括卷绕和展开检测程序以及目标功率级别修改程序。 这些方面具有减少发射功率超过必要时间的优点，从而增加系统容量和性能，并减轻系统资源的分配不当。

公开(公告)号：US07929597B2

公开(公告)日：2011-04-19

申请号：US11399891

申请日：2006-04-07

申请人： Gokhan Mergen ,  Parvathanathan Subrahmanya ,  Nitin Kasturi ,  Rajesh Sundaresan

发明人： Gokhan Mergen ,  Parvathanathan Subrahmanya ,  Nitin Kasturi ,  Rajesh Sundaresan

IPC分类号： H04B1/10

CPC分类号： H04B7/0634 ,  H04B7/0848 ,  H04L7/0058 ,  H04L25/03044

摘要： Techniques for performing equalization at a receiver are described. In an aspect, equalization is performed by sub-sampling an over-sampled input signal to obtain multiple sub-sampled signals. An over-sampled channel impulse response estimate is derived and sub-sampled to obtain multiple sub-sampled channel impulse response estimates. At least one set of equalizer coefficients is derived based on at least one sub-sampled channel impulse response estimate. At least one sub-sampled signal is filtered with the at least one set of equalizer coefficients to obtain at least one output signal. One sub-sampled signal (e.g., with largest energy) may be selected and equalized based on a set of equalizer coefficients derived from an associated sub-sampled channel impulse response estimate. Alternatively, the multiple sub-sampled signals may be equalized based on multiple sets of equalizer coefficients, which may be derived separately or jointly. The equalizer coefficients may be derived in the time domain or frequency domain.

摘要翻译： 描述用于在接收机处执行均衡的技术。 在一方面，通过对过采样输入信号进行子采样来执行均衡以获得多个子采样信号。 导出过采样信道脉冲响应估计并进行子采样以获得多个子采样信道脉冲响应估计。 基于至少一个子采样信道脉冲响应估计导出至少一组均衡器系数。 用至少一组均衡器系数对至少一个子采样信号进行滤波以获得至少一个输出信号。 可以基于从相关联的子采样信道脉冲响应估计导出的一组均衡器系数来选择和均衡一个子采样信号（例如，具有最大能量）。 或者，可以基于可以单独或联合导出的多组均衡器系数来均衡多个子采样信号。 均衡器系数可以在时域或频域中导出。