公开(公告)号：US06757527B1

公开(公告)日：2004-06-29

申请号：US09662546

申请日：2000-09-15

申请人： Erik Dahlbäck ,  Roozbeh Atarius

发明人： Erik Dahlbäck ,  Roozbeh Atarius

IPC分类号： H04B106

CPC分类号： H03L7/0807 ,  H03J7/04 ,  H03L1/00 ,  H03L1/026 ,  H04B1/7073

摘要： A method for synchronizing a local reference frequency in a mobile station includes measuring a current ambient condition of the mobile station and using stored data indicating variance of the local reference frequency with known ambient conditions to determine the method by which the local reference frequency is synchronized.

摘要翻译： 一种用于在移动站中同步本地参考频率的方法包括测量移动站的当前环境状况并使用指示具有已知环境条件的本地参考频率的方差的存储数据来确定本地参考频率同步的方法。

公开(公告)号：US06873648B1

公开(公告)日：2005-03-29

申请号：US09518063

申请日：2000-03-02

申请人： Roozbeh Atarius ,  Erik Dahlbäck

发明人： Roozbeh Atarius ,  Erik Dahlbäck

IPC分类号： H04B7/26 ,  H04B1/7085 ,  H04B1/7113 ,  H04B1/7115 ,  H04B1/707

CPC分类号： H04B1/7085 ,  H04B1/7113 ,  H04B1/7115

摘要： Locations of path rays in a multi-path channel receiver having multiple time references are detected, e.g., when the receiver switches time references. Locations of received path rays are searched for and determined. The locations are tracked for a predetermined amount of time. If the locations are lost after a predetermined amount of time, a new search for the locations of the received path rays is initiated. The searching may include determining a probable location of a most significant path ray, shifting the location within a predetermined interval, analyzing each shifted location to determine whether the shifted location corresponds to the actual location of the received path ray, and depending on the analysis results, completing the search or determining a probable location of a next most significant ray. The analysis may be performed by correlating each shifted location with a pilot sequence and determining if the correlation results exceed a predetermined threshold. If the correlation results do not exceed the threshold, a determination is made whether all the most significant path rays have been analyzed, and if so, a complete search for the path ray location is initiated. When switching from a time reference of low accuracy to a time reference of high accuracy, the low accuracy time reference may be calibrated to the high accuracy time reference based on averaged measurements of the ratio of clock cycles of the time reference of high accuracy to the clock cycles of the time reference of low accuracy.

摘要翻译： 例如，当接收器切换时间基准时，检测具有多个时间基准的多路径信道接收机中路径光线的位置。 搜索并确定接收路径光线的位置。 这些位置被跟踪预定的时间量。 如果位置在预定时间量之后丢失，则开始对接收到的路径光线的位置的新的搜索。 搜索可以包括确定最重要的路径光线的可能位置，在预定间隔内移动位置，分析每个移位的位置以确定移位的位置是否对应于接收的路径光线的实际位置，并且根据分析结果 完成搜索或确定下一个最重要射线的可能位置。 可以通过将每个移位的位置与导频序列相关并且确定相关结果是否超过预定阈值来执行分析。 如果相关结果不超过阈值，则确定是否已经分析了所有最重要的路径光线，并且如果是，则启动对路径光线位置的完整搜索。 当从低精度的时间基准切换到高精度的时间基准时，可以基于高精度时间基准的时钟周期的比率的平均测量值将精度低的时间基准校准为高精度时间基准， 时钟周期的时间参考精度低。

公开(公告)号：US07852824B2

公开(公告)日：2010-12-14

申请号：US11913118

申请日：2006-04-20

申请人： Xiaohui Wang ,  Erik Dahlbäck ,  Marten Myrehed ,  Torgny Palenius

发明人： Xiaohui Wang ,  Erik Dahlbäck ,  Marten Myrehed ,  Torgny Palenius

IPC分类号： H04B7/212

CPC分类号： H04W74/0866 ,  H04B1/707 ,  H04W16/14 ,  H04W24/00

摘要： In third generation mobile communications networks, e.g. CDMA systems, a mobile station intending to access a base station transmits a request for access to a base station and waits for a response in the form of an indicator signal. Both detecting a signal as an acknowledgement message without one being sent from the base station and failing to detect such an acknowledgement message can give rise to noise and interference in the whole cell. The invention provides a method and a user equipment for determining the received signal strength in an access slot in a downlink channel and for asserting whether detection of an indicator signal from the base station in the access slot in the downlink channel is reliable. Hereby, a more secure reception of indicator signals can be obtained, which leads to reduced interference and noise in the whole cell.

摘要翻译： 在第三代移动通信网络中，例如， CDMA系统，旨在接入基站的移动台发送对基站的接入请求，并以指示符信号的形式等待响应。 检测到信号作为确认消息而没有从基站发送并且未能检测到这样的确认消息可能会在整个小区中产生噪声和干扰。 本发明提供一种用于确定下行链路信道中的接入时隙中的接收信号强度的方法和用户设备，并且用于断言来自下行链路信道中的接入时隙中的来自基站的指示符信号的检测是否可靠。 因此，可以获得更安全的指示符信号的接收，这导致整个小区中的干扰和噪声的降低。