公开(公告)号：WO2020010232A1

公开(公告)日：2020-01-09

申请号：PCT/US2019/040556

申请日：2019-07-03

Applicant: QUALCOMM INCORPORATED

Inventor： NADAKUDUTI, Jagadish ,  LU, Lin ,  GUCKIAN, Paul ,  CAI, Mingming ,  HAN, Junsheng ,  FERNANDO, Udara ,  CHALLA, Raghu

IPC: H04W52/36 ,  H04W52/38

Abstract: In certain aspects, a method implemented in a wireless device includes determining a specific absorption rate (SAR) distribution for a first wireless communication technology, determining a power density (PD) distribution for a second wireless communication technology, and combining the SAR distribution and the PD distribution to generate a combined RF exposure distribution. The method also includes determining at least one first maximum allowable power level and at least one second maximum allowable power level for a future time slot based on the combined RF exposure distribution, setting at least one transmission power limit for a first transmitter in the future time slot based on the at least one first maximum allowable power level, and setting at least one transmission power limit for a second transmitter in the future time slot based on the at least one second maximum allowable power level.

公开(公告)号：WO2009120480A1

公开(公告)日：2009-10-01

申请号：PCT/US2009/036438

申请日：2009-03-07

Applicant: QUALCOMM INCORPORATED ,  CHAUDHURI, Arunava ,  YAO, Iwen ,  LIN, Jeremy, H. ,  ROSTAMPISHEH, Ali ,  CHALLA, Raghu ,  SAMPATH, Hemanth ,  WU, Megan ,  ZANOTELLI, Joseph ,  NATH, Mrinal

Inventor： CHAUDHURI, Arunava ,  YAO, Iwen ,  LIN, Jeremy, H. ,  ROSTAMPISHEH, Ali ,  CHALLA, Raghu ,  SAMPATH, Hemanth ,  WU, Megan ,  ZANOTELLI, Joseph ,  NATH, Mrinal

IPC: G06F15/78 ,  H04M1/725

CPC classification number: G06F15/7842

Abstract: A flexible and reconfϊgurable digital system (for example, a wireless modem) includes a set of sub-circuits. Each sub-circuit includes a task manager and an amount of configurable hardware circuitry for performing a type of operation on a data stream. The task manager of a sub-circuit can configure and control the configurable hardware of the sub-circuit. A central processor configures and orchestrates operation of the sub- circuits by maintaining a set of task lists in a tightly coupled memory. Each task list includes task instructions for a corresponding sub-circuit. The task manager of a sub- circuit reads task instructions from its task list and controls its associated hardware circuitry as directed by the instructions. A timestamp task instruction and a push task instruction and the task list architecture allow modem sub-circuits to be easily reconfigured to operate in accordance with either a first air interface standard or a second air interface standard.

Abstract translation: 灵活和可重构的数字系统（例如，无线调制解调器）包括一组子电路。 每个子电路包括任务管理器和用于对数据流执行一种操作的可配置硬件电路的量。 子电路的任务管理器可以配置和控制子电路的可配置硬件。 中央处理器通过在紧耦合的存储器中维护一组任务列表来配置和协调子电路的操作。 每个任务列表包括相应子电路的任务指令。 子电路任务管理器从其任务列表中读取任务指令，并根据指令控制其相关的硬件电路。 时间戳任务指令和推送任务指令以及任务列表架构允许将调制解调器子电路轻松地重新配置为根据第一空中接口标准或第二空中接口标准进行操作。

公开(公告)号：WO2007050925A1

公开(公告)日：2007-05-03

申请号：PCT/US2006/042059

申请日：2006-10-27

Applicant: QUALCOMM INCORPORATED ,  BREHLER, Matthias ,  CHALLA, Raghu ,  MAHAJAN, Amit ,  SIMIC, Emilija, M.

Inventor： BREHLER, Matthias ,  CHALLA, Raghu ,  MAHAJAN, Amit ,  SIMIC, Emilija, M.

IPC: H04L27/00 ,  G01S1/00

CPC classification number: H04L27/0014 ,  G01S19/235 ,  G01S19/29 ,  H04L2027/0046 ,  H04L2027/0065

Abstract: A system, method and device for frequency acquisition. In particular, the embodiments allow for a mobile telephone to simultaneously receive data and/or voice signals while acquiring a GPS signal for its navigation feature. The system, method and device of the present embodiments employ a digital rotator and a local oscillator in concert to acquire the respective signals, correct any frequency errors associated with those signals, and maintain a local timing reference suitable for receiving and transmitting data through a mobile network while simultaneously providing an accurate location through a GPS system.

Abstract translation: 一种用于频率采集的系统，方法和装置。 具体地，实施例允许移动电话在获取用于其导航特征的GPS信号的同时接收数据和/或语音信号。 本实施例的系统，方法和装置一起使用数字旋转器和本地振荡器来获取相应的信号，校正与这些信号相关联的任何频率误差，并且维持适合于通过移动台接收和发送数据的本地定时参考 同时通过GPS系统提供准确的位置。

公开(公告)号：WO2003065673A1

公开(公告)日：2003-08-07

申请号：PCT/US2003/002906

申请日：2003-01-31

Applicant: QUALCOMM, INCORPORATED

Inventor： CHALLA, Raghu ,  ROH, Mark, Charles ,  PATEL, Shimman

IPC: H04L27/00

CPC classification number: H04L27/0014 ,  H04B2201/70701 ,  H04L2027/0028 ,  H04L2027/0055 ,  H04L2027/0095

Abstract: Techniques to acquire the frequency of a signal instance based on a window of data samples covering a time period shorter than the time needed to achieve frequency lock. The window of data samples is initially captured and stored to a sample buffer. A segment of data samples is then retrieved from the sample buffer for processing. The retrieved data samples are rotated by a current frequency error estimate to provide frequency-translated data samples, which are further processed to provide one or more pilot symbols. An updated frequency error estimate for the frequency-translated data samples is then derived based on the pilot symbols using a frequency control loop. The window of data samples is processed for a number of iterations until frequency acquisition is achieved for the signal instance or termination is reached. For each iteration, one segment is processed at a time and typically in sequential order.

Abstract translation: 基于覆盖比实现频率锁定所需的时间更短的时间段的数据样本的窗口来获取信号实例的频率的技术。 数据样本窗口最初被捕获并存储到样本缓冲区。 然后从样本缓冲区中检索一段数据样本进行处理。 检索的数据样本通过当前频率误差估计旋转以提供频率转换数据样本，其被进一步处理以提供一个或多个导频符号。 然后，基于使用频率控制回路的导频符号来导出用于频率转换的数据样本的更新的频率误差估计。 处理数据样本窗口进行多次迭代，直到达到信号实例或终止的频率采集为止。 对于每次迭代，一次处理一个段，通常按顺序进行处理。

公开(公告)号：WO2002067420A3

公开(公告)日：2002-08-29

申请号：PCT/US2002/004727

申请日：2002-02-15

Applicant: QUALCOMM INCORPORATED

Inventor： LI, Tao ,  HOLENSTEIN, Christian ,  KANG, Injup ,  WALKER, Brett, C. ,  PETERZELL, Paul, E. ,  CHALLA, Raghu ,  SEVERSON, Matthew, L.

IPC: H03G3/30

Abstract: A direct downconversion receiver architecture having a DC loop to remove DC offset from the signal components, a digital variable gain amplifier (DVGA) to provide a range of gains, an automatic gain control (AGC) loop to provide gain control for the DVGA and RF/analog circuitry, and a serial bus interface (SBI) unit to provide controls for the RF/analog circuitry via a serial bus. The DVGA may be advantageously designed and located as described herein. The operating mode of the VGA loop may be selected based on the operating mode of the DC loop, since these two loops interact with one another. The duration of time the DC loop is operated in an acquisition mode may be selected to be inversely proportional to the DC loop bandwidth in the acquisition mode. The controls for some or all of the RF/analog circuitry may be provided via the serial bus.

公开(公告)号：WO2018231593A1

公开(公告)日：2018-12-20

申请号：PCT/US2018/036108

申请日：2018-06-05

Applicant: QUALCOMM INCORPORATED

Inventor： CEZANNE, Juergen ,  SADIQ, Bilal ,  LUO, Tao ,  SUBRAMANIAN, Sundar ,  ISLAM, Muhammad, Nazmul ,  LI, Junyi ,  RAGHAVAN, Vasanthan ,  ABEDINI, Navid ,  NAGARAJA, Sumeeth ,  CHALLA, Raghu

IPC: H04B7/06

Abstract: Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine whether to perform a beam pair refinement procedure with regard to the UE and a base station; and/or transmit, to the base station, information regarding whether to perform the beam pair refinement procedure. In some aspects, a base station may receive, from a UE, information regarding a beam pair refinement procedure with regard to the UE; and/or perform the beam pair refinement procedure based at least in part on the information. Numerous other aspects are provided.

公开(公告)号：WO2006055797A2

公开(公告)日：2006-05-26

申请号：PCT/US2005/041856

申请日：2005-11-17

Applicant: QUALCOMM INCORPORATED ,  CHALLA, Raghu ,  RICK, Roland, Reinhard

Inventor： CHALLA, Raghu ,  RICK, Roland, Reinhard

IPC: H04L25/03

CPC classification number: H04L25/03006 ,  H04L25/0328

Abstract: A receiver suppresses co-channel interference (CCI) from other transmitters and intersymbol interference (ISI) due to channel distortion using "virtual" antennas. The virtual antennas may be formed by (1) oversampling a received signal for each actual antenna at the receiver and/or (1) decomposing a sequence of complex-valued samples into a sequence of inphase samples and a sequence of quadrature samples. In one design, the receiver includes a pre-processor, an interference suppressor, and an equalizer. The pre-processor processes received samples for at least one actual antenna and generates at least two sequences of input samples for each actual antenna. The interference suppressor suppresses co-channel interference in the input sample sequences and provides at least one sequence of CCI-suppressed samples. The equalizer performs detection on the CCI-suppressed sample sequence(s) and provides detected bits. The interference suppressor and equalizer may be operated for one or multiple iterations.

Abstract translation: 由于使用“虚拟”天线的信道失真，接收机抑制来自其他发射机的同信道干扰（CCI）和码间干扰（ISI）。 虚拟天线可以通过以下方式形成：（1）在接收机处对每个实际天线的接收信号进行过采样和/或（1）将复值样本序列分解为同相采样序列和正交采样序列。 在一种设计中，接收机包括预处理器，干扰抑制器和均衡器。 预处理器处理接收到的至少一个实际天线的样本，并为每个实际天线生成至少两个输入采样序列。 干扰抑制器抑制输入样本序列中的同信道干扰，并提供至少一个CCI抑制样本序列。 均衡器对CCI抑制的采样序列执行检测，并提供检测到的位。 干扰抑制器和均衡器可以被操作一次或多次迭代。

公开(公告)号：WO2003030391A2

公开(公告)日：2003-04-10

申请号：PCT/US2002/031776

申请日：2002-10-02

Applicant: QUALCOMM, INCORPORATED

Inventor： CHALLA, Raghu ,  SIH, Gilbert, Christopher ,  GLAZKO, Serguei A.

IPC: H04B1/707

CPC classification number: H04B1/708 ,  H04B1/70753 ,  H04B1/7087 ,  H04B1/7117 ,  H04B2201/70701 ,  H04B2201/70707

Abstract: Techniques to acquire pilots over code space and/or frequency errors. In one aspect, pilot acquisition is performed using a number of substages, and some of the substages are pipelined and performed in parallel using different processing elements. A searcher initially searches over a designated code space to find peaks, and these peaks may be re-evaluated. Finger processors then attempt to acquire the candidate peaks. The searcher may be operated to search for the next set of peaks while the finger processors process the current set of peaks. In another aspect, the full range of frequency errors for the pilots is divided into a number of frequency bins. A multi-stage scheme is used to evaluate the bins, and may employ pipelining and parallel processing such that a search for peaks in the next bin is performed while acquisition of peaks found for the current bin is attempted.

Abstract translation: 通过代码空间和/或频率误差获取导频的技术。 在一个方面，使用多个子阶段来执行导频获取，并且使用不同的处理元件并行执行一些子阶段并且执行这些子阶段。 搜索者首先搜索指定的代码空间以找到峰值，并且可以重新评估这些峰值。 手指处理器然后尝试获取候选峰值。 当手指处理器处理当前的一组峰值时，可以操作搜索器来搜索下一组峰值。 另一方面，飞行员的全频率误差被分成许多频率仓。 使用多阶段方案来评估分箱，并且可以采用流水线处理和并行处理，以便在尝试获取为当前分箱找到的峰值时执行下一个分箱中的峰值搜索。

公开(公告)号：WO2003009557A1

公开(公告)日：2003-01-30

申请号：PCT/US2002/022789

申请日：2002-07-16

Applicant: QUALCOMM INCORPORATED

Inventor： CHALLA, Raghu ,  SIH, Gilbert, Christopher

IPC: H04L27/00

CPC classification number: H04L27/0014 ,  H04L2027/0055 ,  H04L2027/0079 ,  H04L2027/0087

Abstract: Techniques to acquire and track pilots in a CDMA system. In an aspect, frequency acquisition of a number of signal instances (i.e., multipaths) in a received signal may be achieved concurrently based on a frequency control loop (RAFC) maintained for each finger processor of a rake receiver. Upon successful acquisition, frequency tracking of acquired multipaths may be achieved based on a combination of a frequency control loop (VAFC) maintained for an oscillator used for downconverting the received signal and the RAFCs for the finger processors. In a tracking mode, the VAFC tracks the average frequency of the acquired multipaths by adjusting the frequency of the oscillator. The RAFC of each finger processor tracks the residual frequency error (e.g., due to Doppler frequency shift) of the individual acquired multipath by adjusting the frequency of a complex sinusoidal signal used in a rotator within the finger processor.

Abstract translation: 在CDMA系统中采集和跟踪飞行员的技术。 在一方面，可以基于为耙式接收机的每个手指处理器维护的频率控制环路（RAFC）同时实现接收信号中的多个信号实例（即，多路径）的频率采集。 在成功获取后，可以基于维持用于下变频接收信号的振荡器的频率控制回路（VAFC）和手指处理器的RAFC的组合来实现获取的多路径的频率跟踪。 在跟踪模式下，VAFC通过调整振荡器的频率跟踪获取的多路径的平均频率。 每个手指处理器的RAFC通过调整在手指处理器内的旋转器中使用的复数正弦信号的频率来跟踪个体获得的多路径的残余频率误差（例如，由于多普勒频移）。

公开(公告)号：WO2002095963A1

公开(公告)日：2002-11-28

申请号：PCT/US2002/011597

申请日：2002-04-09

Applicant: QUALCOMM INCORPORATED

Inventor： CHALLA, Raghu ,  ABRISHAMKAR, Farrokh ,  FEVRIER, Ian ,  GLAZKO, Serguei ,  LEE, Way-Shing ,  PATRICK, Christopher ,  SIH, Gil

IPC: H04B1/00

CPC classification number: H04W56/0035 ,  H04B1/7075 ,  H04W56/001 ,  H04W92/10

Abstract: A spread spectrum wireless device (100) may include a receiver (110), a searcher (128), a search controller (130) and other features. The search controller (130) selectively generates control signals to control the searcher (128), which searches for a spread-spectrum signal. In one embodiment, the architecture of the searcher (128) is dynamically configurable by the search controller (130) to selectively search multiple channels using multiple frequency bins for the signal.

Abstract translation: 扩频无线设备（100）可以包括接收机（110），搜索器（128），搜索控制器（130）和其他特征。 搜索控制器（130）选择性地产生控制信号以控制寻找扩频信号的搜索器（128）。 在一个实施例中，搜索器（128）的架构由搜索控制器（130）动态地配置，以选择性地使用针对该信号的多个频率仓搜索多个信道。