公开(公告)号：WO2008058059A2

公开(公告)日：2008-05-15

申请号：PCT/US2007/083594

申请日：2007-11-05

Applicant: QUALCOMM INCORPORATED ,  VRCELJ, Bojan ,  MANTRAVADI, Ashok ,  LING, Fuyun ,  LI, Linbo ,  KRISHNAMOORTHI, Raghuraman ,  CHARI, Murali, Ramaswamy ,  MURTHY, Vinay

Inventor： VRCELJ, Bojan ,  MANTRAVADI, Ashok ,  LING, Fuyun ,  LI, Linbo ,  KRISHNAMOORTHI, Raghuraman ,  CHARI, Murali, Ramaswamy ,  MURTHY, Vinay

CPC classification number: H04L25/03044 ,  H04B1/1036 ,  H04B1/109 ,  H04B15/00 ,  H04B2215/061 ,  H04L2025/03477

Abstract: The disclosure is directed to a receiver. The receiver includes an interference canceller configured to filter digital samples produced from a modulated signal transmitted over a wireless channel, and a digital variable gain amplifier (DVGA) configured to amplify the filtered digital samples.

Abstract translation: 本公开针对接收器。 接收机包括配置成对从通过无线信道发送的调制信号产生的数字采样进行滤波的干扰消除器，以及配置成放大滤波的数字采样的数字可变增益放大器（DVGA）。

公开(公告)号：WO2007115327A2

公开(公告)日：2007-10-11

申请号：PCT/US2007/066000

申请日：2007-04-04

Applicant: QUALCOMM INCORPORATED ,  KRISHNAMOORTHI, Raghuraman ,  MURTHY, Vinay

Inventor： KRISHNAMOORTHI, Raghuraman ,  MURTHY, Vinay

IPC: H03G3/00 ,  H03G3/30

CPC classification number: H03G3/002 ,  H03G3/3089 ,  H03M1/185

Abstract: Techniques for performing automatic gain control are described. In some aspects, the gain control is achieved with an apparatus having an analog-to-digital converter (ADC) and a digital variable gain amplifier (DVGA), the DVGA configured to receive a digital signal from the ADC, the DVGA having a processor configured to compute a gain using a base n logarithm based on the power of the digital signal output from the ADC, the processor being further configured to apply the gain to the digital signal.

Abstract translation: 描述了执行自动增益控制的技术。 在一些方面中，增益控制通过具有模数转换器（ADC）和数字可变增益放大器（DVGA）的设备来实现，DVGA被配置为从ADC接收数字信号，DVGA具有处理器 被配置为基于从所述ADC输出的所述数字信号的功率使用基数n对数来计算增益，所述处理器进一步被配置为将所述增益应用于所述数字信号。

公开(公告)号：WO2006099532A3

公开(公告)日：2006-09-21

申请号：PCT/US2006/009475

申请日：2006-03-13

Applicant: QUALCOMM INCORPORATED ,  MURTHY, Vinay ,  GUPTA, Alok ,  CHUNG, Seong Taek ,  LING, Fuyun

Inventor： MURTHY, Vinay ,  GUPTA, Alok ,  CHUNG, Seong Taek ,  LING, Fuyun

IPC: H04L27/26 ,  G06F1/03 ,  H04L27/38

Abstract: Techniques for performing frequency control in an OFDM system are described. In one aspect, frequency acquisition is performed based on a received pilot, and frequency tracking is performed based on received OFDM symbols. For frequency acquisition, an initial frequency error estimate may be derived based on the received pilot, and an automatic frequency control (AFC) loop may be initialized with the initial frequency error estimate. For frequency tracking, a frequency error estimate may be derived for each received OFDM symbol, and the AFC loop may be updated with the frequency error estimate. Frequency error in input samples is corrected by the AFC loop with the initial frequency error estimate as well as the frequency error estimate for each received OFDM symbol. In another aspect, a variable number of samples of a received OFDM symbol are selected, e.g., based on the received OFDM symbol timing, for use for frequency error estimation.

公开(公告)号：WO2007118101A1

公开(公告)日：2007-10-18

申请号：PCT/US2007/065896

申请日：2007-04-03

Applicant: QUALCOMM INCORPORATED ,  MURTHY, Vinay ,  LI, Linbo ,  KRISHNAMOORTHI, Raghuraman

Inventor： MURTHY, Vinay ,  LI, Linbo ,  KRISHNAMOORTHI, Raghuraman

IPC: H03G3/30

CPC classification number: H03G3/3052

Abstract: The disclosure is directed to a mobile communication device that includes automatic gain control (AGC) circuitry and operates in either a tracking mode or an acquisition mode. A received signal is sampled n times to calculate an energy estimate that is used to set the gain control values within the AGC circuitry. The value of n varies depending on whether the handset is operating in the acquisition mode or the tracking mode. Acquisition mode is typically considered to be the mode prior to coarse timing acquisition, also referred to as frame acquisition.

Abstract translation: 本公开涉及包括自动增益控制（AGC）电路并且以跟踪模式或采集模式操作的移动通信设备。 接收到的信号被采样n次以计算用于设置AGC电路内的增益控制值的能量估计。 n的值根据手机在采集模式或跟踪模式下的运行而变化。 采集模式通常被认为是粗略定时采集之前的模式，也称为帧采集。

公开(公告)号：WO2007117723A2

公开(公告)日：2007-10-18

申请号：PCT/US2007/060189

申请日：2007-01-05

Applicant: QUALCOMM INCORPORATED ,  MURTHY, Vinay ,  LI, Linbo ,  KRISHNAMOORTHI, Raghuraman

Inventor： MURTHY, Vinay ,  LI, Linbo ,  KRISHNAMOORTHI, Raghuraman

IPC: H04B17/40

CPC classification number: H03G1/0088 ,  H03G3/3052 ,  H04L27/2657

Abstract: A control of an amplifier in an automatic gain control (AGC) loop, e.g. in the RF front end circuitry of an OFDM receiver, provides phase adjustment control data to an associated automatic frequency control (AFC), to compensate for a phase jump that would otherwise be caused by switching of the AGC gain between discrete gain states. In the disclosed example, for each gain state, comparators detect a signal energy estimate crossing either a high threshold or a low threshold. Upon threshold crossing, multiplexers select compensation data corresponding to the necessary transition from the prior state to the new state determined by the comparators, based on identification of the prior state and on the particular threshold that has been crossed (high or low). The phase compensation data supplied to the AFC, for one interval corresponding to the timing of the gain switching, adjusts phase rotation implemented in the AFC.

Abstract translation: 自动增益控制（AGC）回路中放大器的控制，例如， 在OFDM接收机的RF前端电路中，向相关联的自动频率控制（AFC）提供相位调整控制数据，以补偿否则将由离散增益状态之间的AGC增益切换引起的相位跳变。 在所公开的示例中，对于每个增益状态，比较器检测穿过高阈值或低阈值的信号能量估计。 在阈值交叉时，多路复用器基于先前状态的识别和已经被交叉（高或低）的特定阈值来选择对应于从比较器确定的从先前状态到新状态的必要转换的补偿数据。 提供给AFC的相位补偿数据在对应于增益切换的定时的一个间隔内调整在AFC中实现的相位旋转。

公开(公告)号：WO2006099343A1

公开(公告)日：2006-09-21

申请号：PCT/US2006/008977

申请日：2006-03-10

Applicant: QUALCOMM INCORPORATED ,  VRCELJ, Bojan ,  LING, Fuyun ,  KRISHNAMOORTHI, Raghuraman ,  MURTHY, Vinay

Inventor： VRCELJ, Bojan ,  LING, Fuyun ,  KRISHNAMOORTHI, Raghuraman ,  MURTHY, Vinay

IPC: H04L27/26

CPC classification number: H04L27/2656 ,  H04L27/2663 ,  H04L27/2665 ,  H04L27/2675 ,  H04L27/2695

Abstract: A method for synchronizing timing of a receiver to a received orthogonal frequency division multiplexing (OFDM) signal is disclosed. A first timing acquisition is performed with a first received time division multiplexed (TDM) pilot to determine a course timing estimate of the received OFDM signal. A second timing acquisition is performed with a second TDM pilot to determine a fine timing estimate for a OFDM symbol of the received OFDM signal. In the second timing acquisition, the accumulated energy of channel taps over a detection window is determined and a trailing edge of the accumulated energy curve is detected. A Fourier transform (FT) collection window location for subsequent OFDM symbols is adjusted according to the trailing edge information.

Abstract translation: 公开了一种用于使接收机的定时与接收的正交频分复用（OFDM）信号同步的方法。 利用第一接收时分复用（TDM）导频执行第一定时获取，以确定所接收的OFDM信号的路线定时估计。 用第二TDM导频执行第二定时获取，以确定接收到的OFDM信号的OFDM符号的精确定时估计。 在第二定时获取中，确定在检测窗口上的通道抽头的累积能量，并且检测累积能量曲线的后沿。 根据后沿信息调整后续OFDM符号的傅立叶变换（FT）收集窗口位置。

公开(公告)号：WO2019055168A1

公开(公告)日：2019-03-21

申请号：PCT/US2018/046898

申请日：2018-08-17

Applicant: QUALCOMM INCORPORATED

Inventor： KOTHINTI NARESH, Vignyan Reddy ,  HSU, Lisa ,  MURTHY, Vinay ,  KRISHNA, Anil ,  WRIGHT, Gregory

IPC: G06F9/38 ,  G06F9/30

Abstract: Systems and methods are directed to instruction execution in a computer system having an out of order instruction picker, which are typically used in computing systems capable of executing multiple instructions in parallel. Such systems are typically block based and multiple instructions are grouped in execution units such as Reservation Station (RSV) Arrays. If an event, such as an exception, page fault, or similar event occurs, the block may have to be swapped out, that is removed from execution, until the event clears. Typically when the event clears the block is brought back to be executed, but typically will be assigned a different RSV Array and re-executed from the beginning of the block. Tagging instructions that may cause such events and then untagging them, by resetting the tag, once they have executed can eliminate much of the typical unnecessary re-execution of instructions.

公开(公告)号：WO2010075539A1

公开(公告)日：2010-07-01

申请号：PCT/US2009/069459

申请日：2009-12-23

Applicant: QUALCOMM Incorporated ,  VRCELJ, Bojan ,  MUKKAVILLI, Krishna K. ,  KRISHNAMOORTHI, Raghuraman ,  MURTHY, Vinay

Inventor： VRCELJ, Bojan ,  MUKKAVILLI, Krishna K. ,  KRISHNAMOORTHI, Raghuraman ,  MURTHY, Vinay

IPC: H04B1/707

CPC classification number: H04L27/2675 ,  H04L5/0048 ,  H04L7/08 ,  H04L27/2626 ,  H04L27/2665 ,  H04L27/2688 ,  H04L27/2692 ,  H04L27/2695

Abstract: An improved receiver apparatus and acquisition algorithm using TDM pilots is disclosed. The timing acquisition method presented provides capabilities for adapting to changing channel conditions, in particular varying expected delay spreads. The information on an expected delay spread can be fed back to the initial acquisition algorithm based on previous successful attempts, and the delay spreads measured at that time, such as to set the length of the detection window used to in the TDM pilot processing. Based on the delay spread information, the algorithm for processing the specialized TDM pilot can adaptively modify the timing acquisition parameters for more robust performance under interference conditions. This may involve reducing the length of the detection window to just a little more than or equal to the maximum expected delay spread, which reduces sensitivity of the fine timing acquisition to signal noise.

Abstract translation: 公开了一种使用TDM导频的改进的接收机设备和采集算法。 提出的定时获取方法提供了适应不断变化的信道条件，特别是改变预期延迟传播的能力。 关于期望延迟扩展的信息可以基于先前的成功尝试反馈到初始捕获算法，并且在那时测量的延迟扩展，例如设置在TDM导频处理中使用的检测窗口的长度。 基于延迟扩展信息，用于处理专用TDM导频的算法可以自适应地修改定时获取参数，以在干扰条件下实现更强的性能。 这可能涉及将检测窗口的长度减小到大于或等于最大预期延迟扩展的一点，这降低了精确定时采集对信号噪声的灵敏度。

公开(公告)号：WO2008042978A1

公开(公告)日：2008-04-10

申请号：PCT/US2007/080338

申请日：2007-10-03

Applicant: QUALCOMM INCORPORATED ,  MANTRADAVI, Ashok ,  AVADHANAM, Phani Bhushan ,  MURTHY, Vinay

Inventor： MANTRADAVI, Ashok ,  AVADHANAM, Phani Bhushan ,  MURTHY, Vinay

IPC: H04B17/00

CPC classification number: H04B17/327 ,  H04B17/23 ,  H04B17/318

Abstract: Methods and apparatus for power measurement in a communication system. In an aspect, a method is provided for power measurement. The method includes selecting between a signal decoding mode and a power measurement mode, decoding an input signal if the signal decoding mode is selected, and calculating a power measurement associated with the input signal if the power measurement mode is selected. In another aspect, an apparatus is provided for power measurement. The apparatus includes means for selecting between an active mode and a power measurement mode, means for decoding an input signal if the active mode is selected, and means for calculating a power measurement associated with the input signal if the power measurement mode is selected.

Abstract translation: 通信系统中功率测量的方法和装置。 在一方面，提供了用于功率测量的方法。 该方法包括在信号解码模式和功率测量模式之间进行选择，如果选择了信号解码模式则对输入信号进行解码，以及如果选择功率测量模式，则计算与输入信号相关联的功率测量。 另一方面，提供了用于功率测量的装置。 该装置包括用于在活动模式和功率测量模式之间进行选择的装置，如果选择了活动模式，则对输入信号进行解码的装置，以及用于在选择功率测量模式时计算与输入信号相关联的功率测量的装置。

公开(公告)号：WO2007118053A1

公开(公告)日：2007-10-18

申请号：PCT/US2007/065799

申请日：2007-04-02

Applicant: QUALCOMM INCORPORATED ,  MURTHY, Vinay ,  LI, Linbo ,  KRISHNAMOORTHI, Raghuraman

Inventor： MURTHY, Vinay ,  LI, Linbo ,  KRISHNAMOORTHI, Raghuraman

IPC: H03G3/30

CPC classification number: H03G3/3052

Abstract: The disclosure is directed to a mobile communication device that includes automatic gain control (AGC) circuitry. Every n samples of the broadcast signals, an energy estimate of the AGC output signal is used to calculate and update a gain control value. Instead of using all n samples occurring subsequent to a previous gain control value update, only a subset of those n samples are used. In particular the first half of the n samples may be discarded in the energy estimate calculation while only the second half of the n samples may be used.

Abstract translation: 本公开涉及包括自动增益控制（AGC）电路的移动通信设备。 广播信号的每n个样本，AGC输出信号的能量估计用于计算和更新增益控制值。 而不是使用在先前的增益控制值更新之后发生的所有n个样本，仅使用那些n个样本的子集。 特别地，可以在能量估计计算中丢弃n个样本的前半部分，而只能使用n个样本的后半部分。