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294 条记录 (耗时 0.021 秒)

    Frequency Scanning Method, Memory and Terminal to Implement the Method
    31.
    发明申请
    Frequency Scanning Method, Memory and Terminal to Implement the Method 审中-公开
    频率扫描方法，内存和终端实现方法

    公开(公告)号：US20080212540A1

    公开(公告)日：2008-09-04

    申请号：US12068000

    申请日：2006-09-25

    申请人： Jerome Durand ,  Jean Dumazy

    发明人： Jerome Durand ,  Jean Dumazy

    IPC分类号： H04Q7/00 ,  H04Q7/32

    CPC分类号： H04W48/16 ,  H04B1/7087

    摘要： A frequency scanning method to locate a carrier frequency of a base station in a CDMA (Code Division Multiple Access) communication system, the method comprising a cell detection step (76) to determine if a listening frequency is the carrier frequency of a base station by identifying a synchronization code within a radio signal received at the listening frequency, wherein after having located an initial carrier frequency, the cell detection step is only performed for listening frequencies that are spaced apart from the initial carrier frequency by an integer multiple of the channel spacing, this channel spacing being equal to the frequency bandwidth of spreading codes used by base stations in the CDMA communication system.

    摘要翻译： 一种用于在CDMA（码分多址）通信系统中定位基站的载波频率的频率扫描方法，所述方法包括：小区检测步骤（76），用于通过以下步骤确定收听频率是否是基站的载波频率 识别在收听频率接收的无线电信号内的同步码，其中在确定了初始载波频率之后，仅对与初始载波频率间隔开的信道间隔的整数倍的收听频率进行小区检测步骤 该信道间隔等于基站在CDMA通信系统中使用的扩展码的频率带宽。

    Communication device
    34.
    发明授权
    Communication device 有权
    通讯设备

    公开(公告)号：US07388898B2

    公开(公告)日：2008-06-17

    申请号：US10785822

    申请日：2004-02-24

    申请人： Yoshihisa Takahashi ,  Takayasu Muto

    发明人： Yoshihisa Takahashi ,  Takayasu Muto

    IPC分类号： H04B1/00

    CPC分类号： G01S19/30 ,  G01S19/235 ,  H04B1/7085 ,  H04B1/7087 ,  H04L27/22 ,  H04L2027/0073 ,  H04L2027/0079

    摘要： A communication device, able to establish synchronization of frequency and able to continuously track a carrier even if an oscillation frequency of an oscillator changes. The device changes the oscillation frequency of a reference frequency oscillator according to established protocols when the base station of the other party in communication changes by generating a frequency change signal for reporting that the base station has changed and the frequency is changed and outputting it to a control unit of a GPS baseband unit.

    摘要翻译： 一种能够建立频率同步并能够连续跟踪载波的通信装置，即使振荡器的振荡频率发生变化。 当通信对方的基站通过生成用于报告基站已经改变并且频率改变的频率改变信号改变的频率改变信号时，设备根据建立的协议来改变参考频率振荡器的振荡频率并将其输出到 GPS基带单元的控制单元。

    System and method for radio transmitter acquisition
    35.
    发明授权
    System and method for radio transmitter acquisition 失效
    无线电发射机采集系统和方法

    公开(公告)号：US07302268B2

    公开(公告)日：2007-11-27

    申请号：US11458568

    申请日：2006-07-19

    申请人： Shiquan Wu ,  Rene Lamontagne

    发明人： Shiquan Wu ,  Rene Lamontagne

    IPC分类号： H04Q7/20

    CPC分类号： H04B1/7087 ,  H04B1/70754 ,  H04B1/7077 ,  H04B1/70775 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/2613 ,  H04L27/2655

    摘要： A method of a receiver determining the timing of a signal transmitted in a time-slotted manner, the signal comprising a sequence of information which is repeated at a known interval and has at least a known minimum length. The method performs correlation operations between groups of received slots of information, the groups spaced by the known interval. The groups are moved through the received signal, adding and removing slots, to locate a maximum correlation value sum for the group which should correspond to the timing of the slot. The method also can be used to determine a frequency offset at the receiver and/or an initial phase.

    摘要翻译： 一种接收机确定以时隙方式发送的信号的定时的方法，所述信号包括以已知间隔重复且具有至少已知最小长度的信息序列。 该方法在接收到的信息时隙的组之间执行相关操作，所述组间隔了已知间隔。 通过接收的信号移动组，添加和移除时隙，以便为应该对应于时隙的定时的组定位最大相关值和。 该方法还可以用于确定接收机处的频率偏移和/或初始相位。

    Spread-spectrum receiver with progressive fourier transform
    37.
    发明授权
    Spread-spectrum receiver with progressive fourier transform 有权
    具有渐进傅里叶变换的扩频接收机

    公开(公告)号：US07227884B2

    公开(公告)日：2007-06-05

    申请号：US10208882

    申请日：2002-07-31

    申请人： Scott A. McDermott

    发明人： Scott A. McDermott

    IPC分类号： H04B1/69 ,  H04B1/703 ,  H04B1/713

    CPC分类号： H04B1/7087 ,  H04B1/7075 ,  H04L5/0023

    摘要： A receiving system dynamically searches the communications band for transmissions of messages having the same nominal communications parameters, including the use of the same spreading code, but having potentially different specific frequencies and code-phases. The receiver, which is independent of the transmitters, samples the communications band at each code-phase of the spreading code over a span of downconverted transmission frequencies. When a message element is detected at a particular code-phase and frequency, it is forwarded to a demodulator that demodulates the message and sends it to its intended destination. In a preferred embodiment, a progressive Fourier Transform is used to incrementally determine the power level at each successive code-phase at a given frequency, thereby substantially reducing the time required to search for transmissions at each discrete code-phase. To accommodate variances in frequency and/or phase of a received signal from the same transmitter, the received signal is partitioned into subsets, and a composite measure is used to detect subsets that ‘slip’ into an adjacent frequency or phase sampling bin.

    摘要翻译： 接收系统动态地搜索通信频带中具有相同标称通信参数的消息的传输，包括使用相同的扩展码，但具有潜在不同的特定频率和码相位。 独立于发射机的接收机在下变频传输频率的跨度上在扩展码的每个码相处采样通信频带。 当在特定码相和频率处检测到消息元素时，它被转发到解调器，解调器将其发送到其预定的目的地。 在优选实施例中，逐行傅里叶变换被用于在给定频率处逐步确定每个连续码相的功率电平，由此大大减少在每个离散码相处搜索传输所需的时间。 为了适应来自同一发射机的接收信号的频率和/或相位的变化，接收到的信号被划分为子集，并且使用复合测量来检测“滑入”到相邻频率或相位采样箱中的子集。

    Automatic frequency correction method and receiver for time division duplex modes of 3G wireless communications
    38.
    发明授权
    Automatic frequency correction method and receiver for time division duplex modes of 3G wireless communications 有权

    公开(公告)号：US07103339B2

    公开(公告)日：2006-09-05

    申请号：US10460099

    申请日：2003-06-12

    申请人： Gregory S. Sternberg

    发明人： Gregory S. Sternberg

    IPC分类号： H04B7/00

    CPC分类号： H04B1/707 ,  H04B1/7087 ,  H04B1/709 ,  H04L2027/0065

    摘要： A receiver for use in a wireless communication system includes a voltage controlled oscillator and estimating means for obtaining a frequency estimate to adjust the voltage controlled oscillator, thereby correcting an oscillator frequency error. The estimating means performs a number of block correlations on a received signal with a known midamble reference. The output of the block correlators are conjugately multiplied and summed to produce a low-variance estimate of the phase change between correlators. A number of the largest summed values are located, and the located values that exceed a detection threshold are summed to provide a single complex number whose angle is an estimate of the phase change between the correlators.

    Method and apparatus for correcting frequency offset and storage medium storing control program thereof
    39.
    发明授权
    Method and apparatus for correcting frequency offset and storage medium storing control program thereof 失效
    用于校正频率偏移的方法和装置及其存储控制程序的存储介质

    公开(公告)号：US07006558B2

    公开(公告)日：2006-02-28

    申请号：US09955831

    申请日：2001-09-19

    申请人： Majid Boloorian

    发明人： Majid Boloorian

    IPC分类号： H04B1/69 ,  H04B1/707 ,  H04B1/713

    CPC分类号： H04B1/7085 ,  H04B1/7075 ,  H04B1/7087 ,  H04B2201/70701 ,  H04L27/2332 ,  H04L2027/0065 ,  H04L2027/0095

    摘要： The present invention relates to a method and apparatus for correcting frequency offset of a local oscillator in a direct sequence spread spectrum receiver such as Universal Mobile Telecommunications System (UMTS). Received signals comprise a plurality of sequential slots of data. At least one of these includes synchronization data. A correlation is performed between this received data and a locally stored synchronization code. Subsequently, the received data is phase adjusted and a further correlation performed between the phase adjusted data and the locally stored synchronization code. The strongest correlation peak is then determined and a phase offset to be applied to the local oscillator is estimated from the phase adjustment required to produce the strongest peak. This is subsequently applied to the local oscillator.

    摘要翻译： 本发明涉及用于校正诸如通用移动通信系统（UMTS）的直接序列扩频接收机中本地振荡器的频率偏移的方法和装置。 接收信号包括数据的多个顺序时隙。 这些中的至少一个包括同步数据。 在该接收的数据与本地存储的同步码之间执行相关性。 随后，接收的数据被相位调整，并且在相位调整数据和本地存储的同步码之间执行进一步的相关性。 然后确定最强的相关峰值，并且从产生最强峰值所需的相位调整估计要施加到本地振荡器的相位偏移。 随后将其应用于本地振荡器。

    Method for configuration of a compressed mode in a mobile radiocommunication system
    40.
    发明申请
    Method for configuration of a compressed mode in a mobile radiocommunication system 有权
    用于在移动无线电通信系统中配置压缩模式的方法

    公开(公告)号：US20050286468A1

    公开(公告)日：2005-12-29

    申请号：US10509511

    申请日：2003-03-28

    申请人： Pascal Agin ,  Ghislaine Reybet-Degat

    发明人： Pascal Agin ,  Ghislaine Reybet-Degat

    IPC分类号： H04B1/707 ,  H04W36/08 ,  H04Q7/00

    CPC分类号： H04W36/0094 ,  H04B1/7087

    摘要： The invention relates to a method for configuration of a compressed mode in a mobile radiocommunication system. Said method comprises a configuration of a compressed mode defined by means of the parameters for the compressed mode, said parameters for a compressed mode including a transmission gap length (TBVL) and a transmission gap pattern length (TGPL). Said transmission gaps are defined in a first transmission time structure specific to a first system and determined relative to a second transmission time structure specific to a second system to permit measures for the second system to be taken in the first system. A configuration of a compressed mode is determined within said method such that, for each reference configuration, if the duration of the TPGL is such that the transmission gaps occur periodically with fixed position in said second structure, then the TGL is selected to be sufficiently large that two transmission gaps occur in two of said positions, the closest of which overlap each other with an overlap duration long enough to carry out a measure.

    摘要翻译： 本发明涉及一种在移动无线电通信系统中配置压缩模式的方法。 所述方法包括通过压缩模式的参数定义的压缩模式的配置，包括传输间隙长度（TBVL）和传输间隙模式长度（TGPL）的压缩模式的所述参数。 所述传输间隙以第一系统特有的第一传输时间结构定义，并相对于第二系统专用的第二传输时间结构确定，以允许在第一系统中采取第二系统的措施。 在所述方法中确定压缩模式的配置，使得对于每个参考配置，如果TPGL的持续时间使得传输间隙在所述第二结构中以固定位置周期性地发生，则TGL被选择为足够大 在两个所述位置中发生两个传输间隙，其中最接近的位置以足够长的重叠持续时间重叠以执行测量。