公开(公告)号：US20140078909A1

公开(公告)日：2014-03-20

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： 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：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：US20120257523A1

公开(公告)日：2012-10-11

申请号：US13439736

申请日：2012-04-04

申请人： Nitin Kasturi ,  Vidyut M. Naware ,  Ketan N. Patel

发明人： Nitin Kasturi ,  Vidyut M. Naware ,  Ketan N. Patel

IPC分类号： H04W24/00

CPC分类号： H04B7/0871 ,  H04B7/0814 ,  H04B7/0842

摘要： Dynamically control of receive diversity switching in a user equipment (UE) is disclosed. By dynamically controlling the switching between enabling and disabling the receive diversity, power consumption in UEs, such as smart phones and other mobile devices may be reduced. Control is based, at least in part, on measurements for data activity performed by the UE. When the UE finds measurements that would suggest data activity, the UE will switch to enable a receive diversity state when conditions are available for the switch. Similarly, when the UE finds measurements that would suggest data inactivity, the UE will switch to disable the receive diversity state when conditions are available for the switch.

摘要翻译： 公开了用户设备（UE）中的接收分集交换的动态控制。 通过动态地控制启用和禁用接收分集之间的切换，可以减少诸如智能电话和其他移动设备的UE中的功率消耗。 控制至少部分地基于由UE执行的数据活动的测量。 当UE发现将提示数据活动的测量值时，当条件可用于交换机时，UE将切换到启用接收分集状态。 类似地，当UE发现建议数据不活动的测量时，当条件可用于交换机时，UE将切换为禁用接收分集状态。

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：US20100273427A1

公开(公告)日：2010-10-28

申请号：US12712907

申请日：2010-02-25

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

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

IPC分类号： H04B15/00

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.

公开(公告)号：US07319852B2

公开(公告)日：2008-01-15

申请号：US10233364

申请日：2002-08-29

申请人： Nikolai Schlegel ,  Christian Holenstein ,  Daniel Filipovic ,  Nitin Kasturi

发明人： Nikolai Schlegel ,  Christian Holenstein ,  Daniel Filipovic ,  Nitin Kasturi

IPC分类号： H04B1/26

CPC分类号： H04L25/063 ,  H03D3/008 ,  H04B1/30

摘要： An apparatus for coarse compensation of a direct current (DC) offset in a direct to baseband receiver architecture utilizes a serial analog to digital converter (ADC), such as a Delta-Sigma converter, to convert the received signal to digital form. The output of the ADC is sampled for a predetermined number of samples and a counter coupled to the ADC is incremented each time the sample generated by the ADC is a logic one. The counter is not incremented if the sample from the ADC is a logic zero. After the predetermined number of samples is obtained, the counter value is indicative of the DC offset in the received signal. The counter value may be converted by a code converter to a correction value for easy operation of a digital to analog converter (DAC). If the number of samples from the ADC is a power of two, the code converted may be readily implemented by simply inverting the most significant bit (MSB) from the counter to thereby generate a twos complement version of the counter value. The correction value is coupled to the DAC to generate a compensation signal, which is provided to the received signal path in the form of a feedback signal to compensate for the DC offset.

摘要翻译： 用于直接到基带接收机架构中的直流（DC）偏移的粗略补偿的装置利用诸如Δ-Σ转换器的串行模数转换器（ADC）将接收的信号转换成数字形式。 对于预定数量的采样，ADC的输出被采样，并且每当由ADC产生的采样为逻辑1时，耦合到ADC的计数器递增。 如果来自ADC的采样为逻辑0，则计数器不递增。 在获得预定数量的样本之后，计数器值表示接收信号中的直流偏移。 计数器值可以由代码转换器转换成用于容易操作数模转换器（DAC）的校正值。 如果来自ADC的采样数是2的幂，则通过简单地将来自计数器的最高有效位（MSB）反相，从而生成计数器值的二进制补码版本，可以容易地实现转换代码。 校正值耦合到DAC以产生补偿信号，其以反馈信号的形式提供给接收信号路径以补偿DC偏移。

公开(公告)号：US20070110127A1

公开(公告)日：2007-05-17

申请号：US11399886

申请日：2006-04-07

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

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

IPC分类号： H04B1/00 ,  H04L27/06 ,  H04B1/10

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：US20050249149A1

公开(公告)日：2005-11-10

申请号：US10841299

申请日：2004-05-07

申请人： Nitin Kasturi ,  Parvathanathan Subrahmanya

发明人： Nitin Kasturi ,  Parvathanathan Subrahmanya

IPC分类号： H04B7/005 ,  H04W52/22 ,  H04W52/36 ,  H04Q7/00

CPC分类号： H04W52/221 ,  H04W52/146 ,  H04W52/367

摘要： Techniques to mitigate spikes in transmit power, by reducing the magnitude and/or duration of the spikes, are described. Initially, power control is performed in a normal manner and in accordance with a transmit power control (TPC) scheme. If a (e.g., upward) transmit power spike is detected, the power control is performed in a manner to mitigate the adverse effects of the spike and in accordance with another TPC scheme. An upward transmit power spike may be detected, e.g., if a predetermined number of consecutive TPC commands in the upward direction is obtained for increasing transmit power. The upward transmit power spike may be mitigated by limiting the transmit power, reducing the rate of transmit power adjustment in the upward direction, delaying and/or filtering TPC decisions used for transmit power adjustment, preventing upward adjustment of transmit power, and so on. Multiple states may be defined and used to facilitate power control with spike mitigation.

摘要翻译： 描述了通过减小​​尖峰的幅度和/或持续时间来减轻发射功率尖峰的技术。 最初，按照发送功率控制（TPC）方式，以正常的方式进行功率控制。 如果检测到（例如，向上）发射功率尖峰，则以减轻尖峰的不利影响并根据另一TPC方案的方式执行功率控制。 可以检测向上的发送功率尖峰，例如，如果获得了向上方向上的预定数量的连续TPC命令以增加发射功率。 通过限制发射功率，降低向上方向的发射功率调整速率，延迟和/或滤波用于发射功率调整的TPC决定，防止发射功率的向上调整等，可以减轻向上发射功率尖峰。 多个状态可以被定义并用于通过尖峰减轻来促进功率控制。

公开(公告)号：US20050143116A1

公开(公告)日：2005-06-30

申请号：US10750302

申请日：2003-12-30

申请人： Chih-Ping Hsu ,  Parvathanathan Subrahmanya ,  Da-shan Shiu ,  Hyukjun Oh ,  Christopher Riddle ,  Nitin Kasturi

发明人： Chih-Ping Hsu ,  Parvathanathan Subrahmanya ,  Da-shan Shiu ,  Hyukjun Oh ,  Christopher Riddle ,  Nitin Kasturi

IPC分类号： H04B7/005 ,  H04Q7/20 ,  H04B7/00 ,  H04B7/185

CPC分类号： H04W52/12 ,  H04W52/34 ,  H04W52/36

摘要： Techniques are provided to control the transmit power for data transmission on multiple transport channels having different signal quality (SIR) targets. A single SIR target is maintained for all transport channels, and this SIR target is adjusted based only on active transport channels. For each update interval, a data processor processes at least one data block received in the current update interval on at least one of the transport channels and provides the status of each received data block. A controller increases the SIR target based on an up step if any received data block is erased and decreases the SIR target based on a down step if all received data blocks are good. If any received data block is erased, the down step used to adjust the SIR target may be set to the smallest down step size required by all transport channels with erased data blocks.

摘要翻译： 提供技术来控制具有不同信号质量（SIR）目标的多个传输信道上的数据传输的发射功率。 对于所有传输信道维持单个SIR目标，并且该SIR目标仅基于主动传输信道进行调整。 对于每个更新间隔，数据处理器处理在当前更新间隔中在至少一个传输信道上接收的至少一个数据块，并提供每个接收到的数据块的状态。 如果任何接收的数据块被擦除，则控制器基于上升步骤增加SIR目标，并且如果所有接收到的数据块都良好，则基于下降步骤降低SIR目标。 如果任何接收到的数据块被擦除，则用于调整SIR目标的下降步骤可以被设置为具有被擦除的数据块的所有传输信道所需的最小的下降步长。