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    • 6. 发明授权
    • Method of and apparatus for estimating a characteristic of a signal
    • 用于估计信号特性的方法和装置
    • US06256494B1
    • 2001-07-03
    • US09442792
    • 1999-11-18
    • Luis LopesEric VillierBrendan Ludden
    • Luis LopesEric VillierBrendan Ludden
    • H04Q720
    • H04W64/00G01S5/02
    • This invention relates to a method of estimating a characteristic of a signal such as a time of arrival or a transmitter identity in particular in a cellular communication system. Most known techniques have limited performance as they rely on limited amounts of known data. The method of the invention comprise a first step (201) of receiving the signal at a subscriber unit. In a second step (203) the subscriber unit receives assistance data from the fixed network and in a third step (205) an expected signal is derived in response to this assistance data. For GSM the assistance data can be a frame number and a BSIC permitting an entire expected SCH burst to be derived. In a fourth (207) step the signal characteristic is determined by correlation of the received signal and the expected signal. The invention is particularly applicable to location determination in a GSM communication system.
    • 本发明涉及一种特别是在蜂窝通信系统中估计诸如到达时间或发射机身份的信号的特性的方法。 大多数已知技术的性能有限,因为它们依赖于有限数量的已知数据。 本发明的方法包括在用户单元处接收信号的第一步骤(201)。 在第二步骤(203)中,用户单元从固定网络接收辅助数据,并且在第三步骤(205)中,响应于该辅助数据导出预期信号。 对于GSM,辅助数据可以是帧号,BSIC允许导出整个预期的SCH突发。 在第四(207)步骤中,通过接收信号和预期信号的相关来确定信号特性。 本发明特别适用于GSM通信系统中的位置确定。
    • 7. 发明申请
    • RESTRICTED ACCESS IN CELLULAR COMMUNICATION SYSTEMS
    • 细节通信系统中的限制访问
    • US20110105133A1
    • 2011-05-05
    • US12613108
    • 2009-11-05
    • Gerard T. FosterStephen J. BarrettLuis Lopes
    • Gerard T. FosterStephen J. BarrettLuis Lopes
    • H04W72/04
    • H04W48/12H04W84/045
    • A cellular communication system comprises a base station which can to operate in a restricted mode wherein support is restricted to user equipments of a first associated set of user equipments, such as a Closed Subscriber Group. The base station comprises a profile unit which determines a first transmit power profile where the first transmit power profile is indicative of the base station operating in the restricted mode. The base station further comprises a transmitter for transmitting at least one common channel, such as a pilot signal or a broadcast signal, with a transmit power according to the first transmit power profile. User Equipments may measure the power profile to evaluate whether the base station employs restricted access. The invention may in particular reduce the number of access attempts to restricted base stations by non-eligible User Equipments.
    • 蜂窝通信系统包括基站,其能够以限制模式操作,其中支持仅限于第一相关联的一组用户设备的用户设备,诸如封闭用户组。 基站包括简档单元,其确定第一发射功率分布,其中第一发射功率分布指示基站以受限模式操作。 基站还包括发射机,用于根据第一发射功率分布,发送具有发射功率的诸如导频信号或广播信号的至少一个公共信道。 用户设备可以测量功率分布,以评估基站是否采用受限访问。 本发明可以特别地减少非合格用户设备对受限基站的接入尝试次数。
    • 10. 发明授权
    • Method and apparatus for transmitting data in a radio communication system
    • 用于在无线电通信系统中传输数据的方法和装置
    • US07493405B2
    • 2009-02-17
    • US10495082
    • 2002-10-21
    • Luis LopesDavood MolkdarWalter Featherstone
    • Luis LopesDavood MolkdarWalter Featherstone
    • G06F15/16
    • H04L1/0015H04L1/0003H04L1/0009H04L1/0034H04L1/16
    • A method and apparatus for transmitting data in a radio communication system includes a data segmenter (203) segmenting data into data segments that are fed to a transmission encoder (205) which encodes them into transmission blocks having different energy per information bit levels. The transmission blocks are transmitter and feedback information is received from the remote radio station (216). An analysis processor (219) determines an analysis group that comprises at least two data segments having transmission blocks encoded with different energy per information bit levels. The analysis processor (219) further generates a performance distribution measure relating to the analysis group in response to the feedback information. A transmission controller (207) selects a transmission scheme to apply to subsequent data segments in response to the performance distribution measure.
    • 一种用于在无线电通信系统中发送数据的方法和装置包括数据分割器(203),将数据分割成数据段,该数据段被馈送到传输编码器(205),其将它们编码为具有每信息位电平不同的能量的传输块。 传输块是发射机,并且从远程无线电站(216)接收反馈信息。 分析处理器(219)确定包括至少两个数据段的分析组,所述数据段具有以不同能量编码的每个信息比特级别的传输块。 分析处理器(219)还响应于反馈信息生成与分析组相关的性能分布度量。 传输控制器(207)响应于性能分布测量选择应用于后续数据段的传输方案。