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    RADIO RECEIVER, METHOD OF CALIBRATING RADIO RECEIVER, METHOD OF CORRECTING TIME-INDUCED DEVIATION IN RADIO RECEIVER, AND RADIO BASE STATION APPARATUS
    71.
    发明申请
    RADIO RECEIVER, METHOD OF CALIBRATING RADIO RECEIVER, METHOD OF CORRECTING TIME-INDUCED DEVIATION IN RADIO RECEIVER, AND RADIO BASE STATION APPARATUS 审中-公开
    无线电接收机，无线电接收机校准方法，无线电接收机中时间诱导偏差校正方法和无线电台站设备

    公开(公告)号：US20120307941A1

    公开(公告)日：2012-12-06

    申请号：US13416012

    申请日：2012-03-09

    申请人： Shin WATANABE

    发明人： Shin WATANABE

    IPC分类号： H04L27/06

    CPC分类号： H04L27/06 ,  H04L2027/0036 ,  H04L2027/0087

    摘要： A radio receiver includes a signal divider that divides an intermediate frequency signal obtained by converting a frequency of a radio frequency signal received at an analog reception circuit, into a plurality of signal fragments based on an amplitude, and outputs the signal segments; and a plurality of analog to digital converters that perform an analog to digital conversion on the respective signal fragments divided by the signal divider, and output the signal fragments toward a digital reception circuit.

    摘要翻译： 无线电接收机包括信号分频器，其将通过将在模拟接收电路处接收的射频信号的频率转换而获得的中频信号分成多个基于振幅的信号分片，并输出信号分段; 以及对由信号分割器分割的各信号片进行模数转换的多个模/数变换器，并将信号片分离成数字接收电路。

    Correlation-driven adaptation of frequency control for a RF receiver device
    74.
    发明授权
    Correlation-driven adaptation of frequency control for a RF receiver device 有权
    用于RF接收机设备的频率控制的相关驱动适应

    公开(公告)号：US08081939B2

    公开(公告)日：2011-12-20

    申请号：US12681071

    申请日：2008-09-30

    申请人： Mickael Bouyaud ,  Pierluigi D'Alessandro

    发明人： Mickael Bouyaud ,  Pierluigi D'Alessandro

    IPC分类号： H04B1/18

    CPC分类号： H04B1/712 ,  H04B1/7117 ,  H04L27/0014 ,  H04L2027/0065 ,  H04L2027/0069 ,  H04L2027/0081 ,  H04L2027/0087

    摘要： A frequency-control unit is used for controlling an external controllable reference-frequency source. The frequency-control unit includes a filter unit with a controllable filter parameter, which is configured to derive, using the filter parameter, from a frequency-error signal a frequency-control signal for minimizing the frequency error of the reference frequency; and a correlation unit, which is configured to determine from frequency errors of the reference frequency at different points in time a correlation measure indicative of a correlation between the frequency errors at the different points in time. The frequency-control unit is configured to adapt the controllable filter parameter of the filter unit in dependence on the determined correlation measure. The value of the filter parameter can depend also on a receiver path strength, such as an RSCP value.

    摘要翻译： 频率控制单元用于控制外部可控参考频率源。 频率控制单元包括具有可控滤波器参数的滤波器单元，其被配置为使用滤波器参数从频率误差信号中导出用于使参考频率的频率误差最小化的频率控制信号; 以及相关单元，其被配置为从不同时间点的参考频率的频率误差确定表示在不同时间点的频率误差之间的相关性的相关度量。 频率控制单元被配置为根据确定的相关度量来适应滤波器单元的可控滤波器参数。 滤波器参数的值也可以取决于接收器路径强度，例如RSCP值。

    Radio communication apparatus and frequency offset calculation method
    75.
    发明授权
    Radio communication apparatus and frequency offset calculation method 有权
    无线电通信装置和频偏计算方法

    公开(公告)号：US08060051B2

    公开(公告)日：2011-11-15

    申请号：US12409760

    申请日：2009-03-24

    申请人： Takato Ezaki

    发明人： Takato Ezaki

    IPC分类号： H04B1/06

    CPC分类号： G01S11/10 ,  H04L27/0014 ,  H04L2027/0071 ,  H04L2027/0087

    摘要： In a radio communication apparatus, a frequency offset calculator of the radio communication apparatus calculates a frequency offset of the received radio signal from the reception frequency of the radio communication apparatus. An averaging unit averages the frequency offset calculated by the frequency offset calculator. A moving speed calculator calculates the moving speed of an associated radio communication apparatus with which the radio communication apparatus is communicating, based on the frequency offset calculated by the frequency offset calculator. An averaging time changer changes an averaging time for which the frequency offset is averaged by the averaging unit, in accordance with the moving speed of the associated radio communication apparatus calculated by the moving speed calculator.

    摘要翻译： 在无线电通信装置中，无线电通信装置的频率偏移计算器根据无线电通信装置的接收频率计算接收的无线电信号的频率偏移。 平均单元对由频率偏移计算器计算的频率偏移进行平均。 移动速度计算器基于由频率偏移计算器计算的频率偏移量来计算无线电通信装置正在通信的相关无线电通信装置的移动速度。 根据由移动速度计算器计算出的相关联的无线电通信装置的移动速度，平均时间改变器改变通过平均单元对频偏进行平均的平均时间。

    FREQUENCY OFFSET ESTIMATION IN A CDMA SYSTEM
    77.
    发明申请
    FREQUENCY OFFSET ESTIMATION IN A CDMA SYSTEM 有权
    CDMA系统中的频率偏移估计

    公开(公告)号：US20110007644A1

    公开(公告)日：2011-01-13

    申请号：US12741796

    申请日：2008-10-24

    申请人： Simon Nicholas Walker

    发明人： Simon Nicholas Walker

    IPC分类号： H04L12/26 ,  H04B7/216

    CPC分类号： H04B7/2125 ,  H04B1/709 ,  H04J3/0685 ,  H04L27/0014 ,  H04L2027/0028 ,  H04L2027/0048 ,  H04L2027/0065 ,  H04L2027/0087 ,  H04W56/00

    摘要： The present invention provides a method of estimating a frequency offset. The method comprises receiving a wireless signal timed according to a first frequency; generating a local signal timed according to a second frequency; and performing a plurality of synchronization searches, each search comprising obtaining a set of correlation results indicative of a correlation between the wireless signal and the local signal at different timing offsets of the wireless signal relative to the local signal. The method the no comprises finding a series of results, with a result from each of a plurality of the synchronization searches, for which the difference in; timing offset between results from adjacent searches in the series is within a maximum specified value. A frequency off set between the first and second frequencies can be determined from the series.

    摘要翻译： 本发明提供一种估计频偏的方法。 该方法包括接收根据第一频率定时的无线信号; 产生根据第二频率定时的本地信号; 并且执行多个同步搜索，每个搜索包括获得一组指示无线信号与本地信号之间的相关性的相关结果的集合，该无线信号与本地信号相对于本地信号的不同定时偏移。 该方法no包括找到一系列结果，结果来自多个同步搜索中的每一个，其中的差异; 序列中相邻搜索结果之间的时间偏移在最大规定值内。 可以从该系列中确定在第一和第二频率之间设定的频率。

    METHOD FOR ESTIMATING PHASE ERROR IN MIMO OFDM COMMUNICATIONS SYSTEM
    79.
    发明申请
    METHOD FOR ESTIMATING PHASE ERROR IN MIMO OFDM COMMUNICATIONS SYSTEM 失效
    MIMO OFDM通信系统中估计相位误差的方法

    公开(公告)号：US20100166093A1

    公开(公告)日：2010-07-01

    申请号：US12346886

    申请日：2008-12-31

    申请人： Shang-Ho Tsai ,  Hsiao-Lan Chiang ,  Hsuan-Yu Liu ,  Po-Yuen Cheng

    发明人： Shang-Ho Tsai ,  Hsiao-Lan Chiang ,  Hsuan-Yu Liu ,  Po-Yuen Cheng

    IPC分类号： H04L1/02

    CPC分类号： H04L27/2657 ,  H04B7/0413 ,  H04L1/0606 ,  H04L1/0631 ,  H04L1/20 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/03159 ,  H04L27/2675 ,  H04L27/2695 ,  H04L2025/03414 ,  H04L2027/0067 ,  H04L2027/0087

    摘要： A method for estimating a phase error existing in a receiver of a MIMO OFDM communications system is disclosed. The method includes executing Hermitian transpose on channel coefficient matrix of the MIMO OFDM communications system for generating Hermitian-transposed channel coefficient matrix, multiplying received signal matrix of the receiver with the Hermitian-transposed channel coefficient matrix for generating converted signals, summing products of the converted signals and complex conjugates of pilot signals corresponding to the converted signals for generating a sum result, and generating the phase error according to the sum result, the converted signals, and the complex conjugates of the pilot signals. The pilot signals are extracted from the received signal matrix.

    摘要翻译： 公开了一种用于估计存在于MIMO OFDM通信系统的接收机中的相位误差的方法。 该方法包括对MIMO OFDM通信系统的信道系数矩阵执行Hermitian转置，以产生Hermitian转置信道系数矩阵，将接收机的接收信号矩阵与Hermitian转置信道系数矩阵相乘以产生转换信号，将转换后的乘积求和 信号和与转换信号相对应的导频信号的复共轭，用于产生和结果，并根据求和结果，转换信号和导频信号的复共轭产生相位误差。 从接收信号矩阵中提取导频信号。

    Carrier and symbol timing recovery apparatus usable with a vestigial side band receiver and recovery method thereof
    80.
    发明授权
    Carrier and symbol timing recovery apparatus usable with a vestigial side band receiver and recovery method thereof 有权
    可用于残留边带接收机的载波和符号定时恢复装置及其恢复方法

    公开(公告)号：US07643577B2

    公开(公告)日：2010-01-05

    申请号：US11237815

    申请日：2005-09-29

    申请人： Dong-hoon Lee

    发明人： Dong-hoon Lee

    IPC分类号： H03D1/24

    CPC分类号： H04L27/066 ,  H04L7/0278 ,  H04L2027/0028 ,  H04L2027/0055 ,  H04L2027/0067 ,  H04L2027/0087

    摘要： A carrier and symbol timing recovery apparatus usable in a VSB (Vestigial Side Band) receiver, and a method thereof. For a carrier and symbol timing recovery, error information is detected using a pilot signal, an upper sideband and a lower sideband of a received signal. Each of the detected error information is multiplied by a predetermined weight, respectively, and the results of the respective multiplications are added/combined. Therefore, even though the pilot signal may be corrupted, the carrier recovery can nevertheless be accurately performed. Additionally, even though the upper sideband of a received VSB-modulated signal may be corrupted, the lower sideband can be utilized to perform the symbol timing recovery. As a result, performance of a receiving system can be improved even under unfavorable channel characteristics. Moreover, since the carrier recovery and the symbol timing recovery are executed through a single apparatus, it becomes possible to simplify a hardware implementation thereof.

    摘要翻译： 可用于VSB（残留边带）接收机的载波和符号定时恢复装置及其方法。 对于载波和符号定时恢复，使用接收信号的导频信号，上边带和下边带检测错误信息。 每个检测到的误差信息分别乘以预定的权重，并且相加/合并各个乘法的结果。 因此，即使导频信号可能被破坏，仍可以准确地执行载波恢复。 另外，即使接收的VSB调制信号的上边带可能被破坏，也可以利用下边带来执行符号定时恢复。 结果，即使在不利的信道特征的情况下，也可以提高接收系统的性能。 此外，由于通过单个装置执行载波恢复和符号定时恢复，因此可以简化其硬件实现。