利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

2 条记录 (耗时 0.018 秒)

    Electronic devices having automatic frequency control systems and methods and computer program products for operating the same
    1.
    发明授权
    Electronic devices having automatic frequency control systems and methods and computer program products for operating the same 有权
    具有自动频率控制系统和方法的电子设备以及用于操作该电子设备的计算机程序产品

    公开(公告)号：US07177602B2

    公开(公告)日：2007-02-13

    申请号：US10457913

    申请日：2003-06-10

    申请人： Mikael Ziren ,  Jonas Ohlsson ,  Tatjana Hrnjez ,  Elias Jonsson ,  Bo Bernhardsson

    发明人： Mikael Ziren ,  Jonas Ohlsson ,  Tatjana Hrnjez ,  Elias Jonsson ,  Bo Bernhardsson

    IPC分类号： H04B1/40 ,  H04B1/04 ,  H04B1/18 ,  H04B7/00

    CPC分类号： H03J7/04 ,  H03J2200/02

    摘要： An automatic frequency control (AFC) system in an electronic device is operated by using an AFC-algorithm component to determine a frequency error corresponding to a difference between a frequency of a signal output from a signal generator and a received signal frequency. The frequency error determined by the AFC-algorithm component is multiplied by a scaling factor, which is set to zero after an adjustment has been made to change a frequency of the signal output from the signal generator. The scaling factor is increased from zero to one over time. The scaled frequency error is used to determine whether to adjust the frequency of the signal output from the signal generator.

    摘要翻译： 通过使用AFC算法组件来操作电子设备中的自动频率控制（AFC）系统，以确定与从信号发生器输出的信号的频率和接收到的信号频率之间的差异相对应的频率误差。 由AFC算法分量确定的频率误差乘以一个缩放因子，该比例因子在进行调整以改变从信号发生器输出的信号的频率之后被设置为零。 缩放因子随着时间的推移从零增加到一个。 缩放的频率误差用于确定是否调整从信号发生器输出的信号的频率。

    Method and system for determining uplink/downlink path-loss difference
    2.
    发明申请
    Method and system for determining uplink/downlink path-loss difference 有权
    确定上行链路/下行链路路径损耗差异的方法和系统

    公开(公告)号：US20050143118A1

    公开(公告)日：2005-06-30

    申请号：US10926742

    申请日：2004-08-26

    申请人： Bo Bernhardsson ,  Jonas Ohlsson ,  Mikael Ziren

    发明人： Bo Bernhardsson ,  Jonas Ohlsson ,  Mikael Ziren

    IPC分类号： H04B7/005 ,  H04B17/00 ,  H04W52/14 ,  H04W52/22 ,  H04W52/24 ,  H04W52/50 ,  H04Q7/20

    CPC分类号： H04W52/246 ,  H04B17/327 ,  H04W52/14 ,  H04W52/228 ,  H04W52/242 ,  H04W52/245 ,  H04W52/50

    摘要： Methods and apparatus are described for estimating a path-loss difference between uplink and downlink communications at a first node communicating with a second node in a communication system. A quantity of access request preambles transmitted by the first node to the second node before an acknowledgement from the second node of successful receipt of a preamble is received at the first node is determined. A difference between an uplink path-loss attributed to communications from the first node to the second node and a downlink path-loss attributed to communications to the first node from the second node is estimated based on the transmitted preamble quantity determination. Once the path-loss difference is estimated, the estimate can be used for many purposes, such as to determine a transmission power of the first node.

    摘要翻译： 描述了用于估计在通信系统中与第二节点通信的第一节点处的上行链路和下行链路通信之间的路径损耗差异的方法和装置。 在第一节点处接收到来自第二节点的成功接收的确认之前由第一节点发送到第二节点的接入请求前导码的数量被确定。 基于所发送的前导码量确定，估计归因于从第一节点到第二节点的通信的上行链路路径损耗与归因于从第二节点到第一节点的通信的下行链路路径损耗之间的差异。 一旦路径损耗差被估计，该估计可用于许多目的，例如确定第一节点的发射功率。