中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

30 records (took 0.017 seconds)

    Method and apparatus for performing frequency tracking based on diversity transmitted pilots in a CDMA communication system
    3.
    发明授权
    Method and apparatus for performing frequency tracking based on diversity transmitted pilots in a CDMA communication system 有权
    一种用于在CDMA通信系统中基于分集传输导频执行频率跟踪的方法和装置

    公开(公告)号：US07430191B2

    公开(公告)日：2008-09-30

    申请号：US09950744

    申请日：2001-09-10

    Applicant: Parvathanathan Subrahmanya ,  Andrew Sendonaris

    Inventor： Parvathanathan Subrahmanya ,  Andrew Sendonaris

    IPC: H04B7/216

    CPC classification number: H04L27/2332 ,  H04B2201/70701 ,  H04L2027/0055 ,  H04L2027/0065 ,  H04L2027/0081 ,  H04L2027/0087

    Abstract: Techniques to acquire and track a received signal instance (or multipath) based on one or more transmitted pilots. In an aspect, a frequency tracking loop is provided to acquire and track the multipath, and supports a number of loop modes (e.g., acquisition and tracking modes). Each loop mode may be associated with a respective frequency detector and a set of values for a set of elements in the loop. In another aspect, several frequency detectors are provided for deriving estimates of the frequency error in the downconversion of the multipath (e.g., from radio frequency to baseband). In one design, maximum likelihood estimates of the frequency error are derived based on the recovered pilot symbols. In another design, the frequency error estimates for the multipath are derived based on the frequency error estimated for each transmitted signal.

    Abstract translation: 基于一个或多个发射的导频获取和跟踪接收到的信号实例（或多路径）的技术。 在一方面，提供频率跟踪环以获取和跟踪多路径，并且支持多种环路模式（例如，采集和跟踪模式）。 每个循环模式可以与相应的频率检测器和一组循环中的元件的值相关联。 在另一方面，提供了几个频率检测器用于导出多路径下变频（例如，从射频到基带）中的频率误差的估计。 在一种设计中，基于恢复的导频符号导出频率误差的最大似然估计。 在另一种设计中，基于针对每个发射信号估计的频率误差导出多路径的频率误差估计。

    Reliability determination and combining of power control commands received in a wireless communication system
    8.
    发明授权
    Reliability determination and combining of power control commands received in a wireless communication system 有权
    在无线通信系统中接收的功率控制命令的可靠性确定和组合

    公开(公告)号：US07340268B2

    公开(公告)日：2008-03-04

    申请号：US10457846

    申请日：2003-06-10

    Applicant: Hyukjun Oh ,  Parvathanathan Subrahmanya ,  Nitin Kasturi ,  Messay Amerga ,  Chih-Ping Hsu ,  Christopher C. Riddle ,  Andrew Sendonaris

    Inventor： Hyukjun Oh ,  Parvathanathan Subrahmanya ,  Nitin Kasturi ,  Messay Amerga ,  Chih-Ping Hsu ,  Christopher C. Riddle ,  Andrew Sendonaris

    IPC: H04B7/00 ,  H04Q7/20

    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。

    Adjusting transmit power in a wireless communication system
    10.
    发明授权
    Adjusting transmit power in a wireless communication system 有权
    调整无线通信系统中的发射功率

    公开(公告)号：US07835762B2

    公开(公告)日：2010-11-16

    申请号：US10282990

    申请日：2002-10-28

    Applicant: Andrew Sendonaris

    Inventor： Andrew Sendonaris

    IPC: H04B7/00

    CPC classification number: H04W52/283 ,  H04W52/223 ,  H04W52/282 ,  H04W52/60

    Abstract: A method and apparatus are provided for determining adjustments to be made to a transmitter based on the velocity or location of a wireless communication device in relation to a wireless network infrastructure. The transmitter to be adjusted can be located in either the wireless communication device, or in a device in the wireless communication infrastructure, or both.

    Abstract translation: 提供了一种用于基于无线通信设备相对于无线网络基础设施的速度或位置来确定对发射机进行调整的方法和装置。 要调整的发射机可以位于无线通信设备中，或位于无线通信基础设施中的设备中，或两者。

Patent Agency Ranking