公开(公告)号：EP1949626A1

公开(公告)日：2008-07-30

申请号：EP06839905.4

申请日：2006-11-15

Applicant: QUALCOMM Incorporated

Inventor： MERGEN, Gokhan ,  SETHURAMAN, Vignesh ,  KASTURI, Nitin ,  SUBRAHMANYA, Parvathanathan

IPC: H04L25/02 ,  H04B1/707

CPC classification number: H04L25/0216 ,  H04L25/0218

Abstract: 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.

公开(公告)号：WO2007059518A1

公开(公告)日：2007-05-24

申请号：PCT/US2006/060948

申请日：2006-11-15

Applicant: QUALCOMM INCORPORATED ,  MERGEN, Gokhan ,  SETHURAMAN, Vignesh ,  KASTURI, Nitin ,  SUBRAHMANYA, Parvathanathan

Inventor： MERGEN, Gokhan ,  SETHURAMAN, Vignesh ,  KASTURI, Nitin ,  SUBRAHMANYA, Parvathanathan

IPC: H04L25/02 ,  H04B1/707

CPC classification number: H04L25/0216 ,  H04L25/0218

Abstract: 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.

Abstract translation: 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：WO2004077695A1

公开(公告)日：2004-09-10

申请号：PCT/US2004/005544

申请日：2004-02-24

Applicant: QUALCOMM INCORPORATED ,  OH, Hyukjun ,  SUBRAHMANYA, Parvathanathan ,  KASTURI, Nitin ,  AMERGA, Messay ,  HSU, Chih-Ping ,  RIDDLE, Christopher ,  SENDONARIS, Andrew

Inventor： OH, Hyukjun ,  SUBRAHMANYA, Parvathanathan ,  KASTURI, Nitin ,  AMERGA, Messay ,  HSU, Chih-Ping ,  RIDDLE, Christopher ,  SENDONARIS, Andrew

IPC: H04B7/005

CPC classification number: H04W52/56 ,  H04W52/40 ,  H04W52/58

Abstract: The reliability of transmit power control (TPC) commands received from a transmitter is determined based on a TPC target value. The TPC target value is derived based on a TPC threshold and possibly a weight, depending on the receiver implementation. A received TPC command is considered reliable if its absolute value exceeds the TPC target value. Received TPC commands deemed as unreliable are discarded and not used for power control. Multiple TPC target values, used for detecting UP and DOWN commands, may be derived with multiple scaling factors. For a receiver in soft handover and receiving TPC commands from multiple transmitters, a different TPC target value may be derived for each transmitter. The received TPC commands for each transmitter are compared against that transmitter's TPC target value. Received TPC commands deemed as unreliable are discarded and not combined.

Abstract translation: 基于TPC目标值确定从发射机接收的发射功率控制（TPC）命令的可靠性。 TPC目标值基于TPC阈值和可能的权重导出，这取决于接收机实现。 如果接收到的TPC命令的绝对值超过TPC目标值，则认为它是可靠的。 被认为不可靠的TPC命令被丢弃，不用于功率控制。 用于检测UP和DOWN命令的多个TPC目标值可以用多个缩放因子导出。 对于软切换中的接收机和从多个发射机接收TPC命令，可以为每个发射机导出不同的TPC目标值。 每个发射机接收的TPC命令与该发射机的TPC目标值进行比较。 被认为不可靠的TPC命令被丢弃并不组合。

公开(公告)号：EP1792417B1

公开(公告)日：2012-03-07

申请号：EP05795939.7

申请日：2005-09-08

Applicant: QUALCOMM INCORPORATED

Inventor： ODIGIE, Erumusele Olumuyiwa ,  KASTURI, Nitin ,  SUBRAHMANYA, Parvathanathan

IPC: H04B7/005

CPC classification number: H04W52/221 ,  H04W52/223 ,  H04W52/267 ,  H04W52/346 ,  H04W52/367 ,  Y02D70/124

Abstract: 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.

Abstract translation: 一种装置，系统和方法有效地维护和施加到授权功率水平来确定的矿井功率受限传输之后和新的功率控制命令已被接收到之前的发送功率电平管理在用户设备（UE）设备的发送功率。 UE设备维护通过监测和基于接收到的功率控制命令调整所述授权功率水平授权的功率水平。 功率受限传输，其中所述最大功率电平小于所述授权功率水平之后，UE设备确定性地雷基于授权的功率水平为下一个传输的传输功率电平。 因此，功率限制的情况已经停止之后，UE设备发送在接收到下一个功率控制命令之前的最佳功率电平发射消除的低效率在低于授权功率。

公开(公告)号：EP1565999B1

公开(公告)日：2007-05-02

申请号：EP03790000.8

申请日：2003-11-20

Applicant: QUALCOMM INCORPORATED

Inventor： ZHANG, Yi ,  KASTURI, Nitin ,  VAYANOS, Alkinoos Hector ,  RAO, Subramanya P. N.

IPC: H04B7/005 ,  H04L1/00

CPC classification number: H04W52/58 ,  H04L1/0001 ,  H04L1/0019 ,  H04L47/14 ,  H04W28/18 ,  H04W52/221 ,  H04W52/26 ,  H04W52/367 ,  H04W52/50 ,  H04W52/60

Abstract: Various embodiments are provided for determining a set of acceptable transport format combinations for transmission on a current time frame. A set of acceptable modified rate power adjustment values is determined based on a maximum power level, an accumulated power commands and an initial power control command. A set of acceptable channel gain factors is determined based on the set of acceptable modified rate power adjustments values, and the set of acceptable transport format combinations is determined based on the set of acceptable channel gain factors. A possible set of modified rate power adjustment values is associated to a set of channel gain factors for determining the set of accepted channel gain factors based on various design of a transmitter chain used for transmission of data from the mobile station.

公开(公告)号：EP2695237B1

公开(公告)日：2017-07-26

申请号：EP12716882.1

申请日：2012-04-06

Applicant: Qualcomm Incorporated

Inventor： SUBRAHMANYA, Parvathanathan ,  KASTURI, Nitin

IPC: H04W52/24 ,  H04W52/28 ,  H04W52/36 ,  H01Q1/24 ,  H04B1/38 ,  H04B1/3827

CPC classification number: H01Q1/245 ,  H04B1/3838 ,  H04W52/247 ,  H04W52/283 ,  H04W52/288 ,  H04W52/367

公开(公告)号：EP2143229A1

公开(公告)日：2010-01-13

申请号：EP08747186.8

申请日：2008-04-30

Applicant: QUALCOMM Incorporated

Inventor： MERGEN, Gokhan ,  SHAH, Manini S. ,  GROSSMAN, Nathaniel Lev ,  KASTURI, Nitin ,  LI, Yan

IPC: H04L1/20 ,  H04L1/00 ,  H04L25/03

CPC classification number: H04L1/20 ,  H04L1/0026

Abstract: Disclosed are methods and apparatus for predicting a channel quality indicator in a communication system, and in particular a delayed receiver. A disclosed method for determining the predictive channel quality indicator for a delayed receiver includes determining at least one channel quality indicator from a non-delayed receiver. The method also includes determining another channel quality indicator from the delayed receiver, and then calculating the predictive channel quality indicator for the delayed receiver through a function of the channel quality indicators from the non-delayed receiver and the channel quality indicator from the delayed receiver. Corresponding apparatus are also disclosed.

公开(公告)号：WO2011053887A1

公开(公告)日：2011-05-05

申请号：PCT/US2010/054888

申请日：2010-10-30

Applicant: QUALCOMM INCORPORATED ,  NARASIMHA, Madihally J. ,  KIM, Je Woo ,  KASTURI, Nitin ,  SUBRAHMANYA, Parvathanathan

Inventor： NARASIMHA, Madihally J. ,  KIM, Je Woo ,  KASTURI, Nitin ,  SUBRAHMANYA, Parvathanathan

IPC: H04B1/52 ,  H04B1/38 ,  H04B1/40

CPC classification number: H04B1/525 ,  H04B1/3805 ,  H04B1/406

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

Abstract translation: 本公开的某些实施例支持用于支持不同无线电技术的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：WO2007059517A3

公开(公告)日：2007-05-24

申请号：PCT/US2006/060947

申请日：2006-11-15

Applicant: QUALCOMM INCORPORATED ,  MERGEN, Gokhan ,  SUBRAHMANYA, Parvathanathan ,  KASTURI, Nitin ,  SUNDARESAN, Rajesh

Inventor： MERGEN, Gokhan ,  SUBRAHMANYA, Parvathanathan ,  KASTURI, Nitin ,  SUNDARESAN, Rajesh

IPC: H04L25/03 ,  H04L7/04 ,  H04L7/033 ,  H04B7/06 ,  H04B7/08

Abstract: 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.

公开(公告)号：WO2005114866A1

公开(公告)日：2005-12-01

申请号：PCT/US2005/013520

申请日：2005-04-19

Applicant: QUALCOMM Incorporated ,  KASTURI, Nitin ,  SUBRAHMANYA, Parvathanathan

Inventor： KASTURI, Nitin ,  SUBRAHMANYA, Parvathanathan

IPC: H04B7/005

CPC classification number: H04W52/221 ,  H04W52/146 ,  H04W52/367

Abstract: 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.

Abstract translation: 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。