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    METHOD AND APPARATUS FOR DERIVING A CHANNEL IMPULSE RESPONSE ESTIMATE FOR A WIRELESS CHANNEL
    11.
    发明申请
    METHOD AND APPARATUS FOR DERIVING A CHANNEL IMPULSE RESPONSE ESTIMATE FOR A WIRELESS CHANNEL 审中-公开
    用于导出无线通道的通道冲击响应估计的方法和装置

    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。

    QUICK DETECTION OF SIGNALING IN A WIRELESS COMMUNICATION SYSTEM
    12.
    发明申请
    QUICK DETECTION OF SIGNALING IN A WIRELESS COMMUNICATION SYSTEM 审中-公开

    公开(公告)号：WO2007035737A3

    公开(公告)日：2007-03-29

    申请号：PCT/US2006/036489

    申请日：2006-09-15

    Applicant: QUALCOMM INCORPORATED ,  SUBRAHMANYA, Parvathanathan ,  SHESHADRI, Thejaswi, Bharadwaj, Madapushi ,  CHAWLA, Vivek

    Inventor： SUBRAHMANYA, Parvathanathan ,  SHESHADRI, Thejaswi, Bharadwaj, Madapushi ,  CHAWLA, Vivek

    IPC: H04L27/227

    Abstract: Quick frequency tracking (QFT), quick time tracking (QTT), and non-causal pilot filtering (NCP) are used to detect sporadically transmitted signaling, e.g., paging indicators. For QFT, multiple hypothesized frequency errors are applied to an input signal to obtain multiple rotated signals. The energies of the rotated signals are computed. The hypothesized frequency error with the largest energy is provided as a frequency error estimate. For QTT, coherent accumulation is performed on the input signal for a first set of time offsets, e.g., early, on-time, and late. Interpolation, energy computation, and non-coherent accumulation are then performed to obtain a timing error estimate with higher time resolution. For NCP, pilot symbols are filtered with a non-causal filter to obtain pilot estimates for one antenna for non-STTD and for two antennas for STTD. The frequency and timing error estimates and the pilot estimates are used to detect the signaling.

    ERASURE DETECTION AND POWER CONTROL FOR A TRANSPORT CHANNEL WITH UNKNOWN FORMAT IN A WIRELESS COMMUNICATION SYSTEM
    13.
    发明申请
    ERASURE DETECTION AND POWER CONTROL FOR A TRANSPORT CHANNEL WITH UNKNOWN FORMAT IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
    在无线通信系统中具有未知格式的传输信道的检测和功率控制

    公开(公告)号：WO2005125042A1

    公开(公告)日：2005-12-29

    申请号：PCT/US2005/019785

    申请日：2005-06-06

    Applicant: QUALCOMM Incorporated ,  BUTALA, Amit ,  SUBRAHMANYA, Parvathanathan ,  OH, Hyukjun

    Inventor： BUTALA, Amit ,  SUBRAHMANYA, Parvathanathan ,  OH, Hyukjun

    IPC: H04B7/005

    CPC classification number: H04W52/04 ,  H04L1/20 ,  H04L1/201 ,  H04W52/12 ,  H04W52/16 ,  H04W52/20 ,  H04W52/287 ,  H04W52/362 ,  H04W52/44

    Abstract: Erasure detection and power control are performed for an intermittently active transport channel with unknown format. A receiver processes each received block and determines whether it passes or fails CRC. For each received block with CRC failure, the receiver performs erasure detection by computing a symbol error rate (SER) and energy of the received block, comparing the computed SER against an SER threshold, comparing the computed energy against an energy threshold, and declaring an erasure if the computed SER is less than the SER threshold and the computed energy exceeds the energy threshold. The SER and energy thresholds may be adjusted based on the average SER and the average energy for prior received blocks with CRC failures. For power control, an SIR target is increased by an UP step whenever an erased block is detected for the transport channel.

    Abstract translation: 对具有未知格式的间歇活动的传输信道执行擦除检测和功率控制。 接收器处理每个接收的块并确定其是否通过或失败CRC。 对于每个具有CRC故障的接收块，接收机通过计算接收块的符号错误率（SER）和能量来执行擦除检测，将计算的SER与SER阈值进行比较，将计算出的能量与能量阈值进行比较，并且声明 如果计算的SER小于SER阈值并且计算的能量超过能量阈值，则擦除。 可以基于具有CRC故障的先前接收的块的平均SER和平均能量来调整SER和能量阈值。 对于功率控制，每当检测到用于传输信道的擦除块时，SIR目标通过UP步增加。

    RELIABILITY DETERMINATION AND COMBINING OF POWER CONTROL COMMANDS DURING SOFT-HANDOFF
    14.
    发明申请
    RELIABILITY DETERMINATION AND COMBINING OF POWER CONTROL COMMANDS DURING SOFT-HANDOFF 审中-公开
    动力控制指令的可靠性确定与组合

    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。

    IMPROVED COMMUNICATION SYSTEM PERFORMANCE USING POSITION LOCATION INFORMATION
    15.
    发明申请
    IMPROVED COMMUNICATION SYSTEM PERFORMANCE USING POSITION LOCATION INFORMATION 审中-公开
    使用位置信息改进通信系统性能

    公开(公告)号：WO2004021585A2

    公开(公告)日：2004-03-11

    申请号：PCT/US2003/027269

    申请日：2003-08-29

    Applicant: QUALCOMM INCORPORATED

    Inventor： SENDONARIS, Andrew ,  SHIU, Da-shan ,  PATTERSON, David M. ,  SUBRAHMANYA, Parvathanathan ,  TERASAWA, Daisuke

    IPC: H04B1/00

    CPC classification number: H04B1/70754

    Abstract: A method and apparatus for using information about a mobile terminal's location relative to a base station can improve performance of a communication system. In addition, information about the mobile terminal's velocity relative to the base station may be used to improve performance of the communication system. The location information may be used to estimate a nominal PN offset, and a set of PN offset to use, for processing communication signals. The velocity information may be used to estimate a nominal frequency of the communication signals.

    Abstract translation: 使用关于移动终端相对于基站的位置的信息的方法和装置可以提高通信系统的性能。 另外，可以使用关于移动终端相对于基站的速度的信息来改善通信系统的性能。 可以使用位置信息来估计用于处理通信信号的标称PN偏移和要使用的一组PN偏移。 速度信息可以用于估计通信信号的标称频率。

    INFRASTRUCTURE-UNASSISTED INTER-DEVICE WIRELESS WIDE AREA NETWORK HANDOFF
    16.
    发明申请
    INFRASTRUCTURE-UNASSISTED INTER-DEVICE WIRELESS WIDE AREA NETWORK HANDOFF 审中-公开
    基础设施 - 不具备的设备无线宽带网络切换

    公开(公告)号：WO2012158850A1

    公开(公告)日：2012-11-22

    申请号：PCT/US2012/038223

    申请日：2012-05-16

    Applicant: QUALCOMM INCORPORATED ,  KRISHNASWAMY, Dilip ,  SUBRAHMANYA, Parvathanathan

    Inventor： KRISHNASWAMY, Dilip ,  SUBRAHMANYA, Parvathanathan

    IPC: H04W36/00 ,  H04M1/60

    CPC classification number: H04W36/00 ,  H04M1/006 ,  H04W8/26 ,  H04W84/005 ,  H04W88/02 ,  H04W88/04 ,  H04W88/06

    Abstract: Aspects describe infrastructure unassisted inter-device handoff. A method performed by a wireless communications apparatus for inter-device handoff is disclosed. A wireless communications apparatus that performs a network unassisted inter-device handoff is disclosed. A computer program product comprising a computer-readable medium that includes codes for carrying out inter-device handoff is disclosed. At least one processor configured to perform a network unassisted communication handoff is disclosed.

    Abstract translation: 方面描述了基础设施无协调的设备间切换。 公开了一种由用于设备间切换的无线通信装置执行的方法。 公开了一种执行网络非辅助设备间切换的无线通信装置。 公开了一种计算机程序产品，其包括包括用于执行设备间切换的代码的计算机可读介质。 公开了至少一个被配置为执行网络非辅助通信切换的处理器。

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