Frequency syncrhonization apparatus and method for OFDM system
    1.
    发明申请
    Frequency syncrhonization apparatus and method for OFDM system 审中-公开
    OFDM系统的频率同步化装置和方法

    公开(公告)号:US20060271611A1

    公开(公告)日:2006-11-30

    申请号:US11412763

    申请日:2006-04-27

    IPC分类号: G06F15/00

    摘要: Provided is a synchronization apparatus and method for a receiver that performs synchronization in a digital domain and detects a transmission signal. The synchronization apparatus includes an Analog-to-Digital (A/D) converter for converting a received signal into a digital signal, a frequency synchronizer for synchronizing a frequency using the digital signal output from the A/D converter, a signal detection unit for detecting a transmission symbol from a signal synchronized by the frequency synchronizer, and a residual phase detector for compensating for a residual phase of the transmission symbol output from the signal detection unit and outputting the resulting transmission symbol. The frequency synchronizer is capable of accurately and efficiently compensating for a frequency offset by minimizing the time delay caused by subcarrier synchronization using an improved CORDIC algorithm.

    摘要翻译: 提供了一种用于在数字域中执行同步并检测传输信号的接收机的同步装置和方法。 同步装置包括用于将接收信号转换为数字信号的模数(A / D)转换器,用于使用从A / D转换器输出的数字信号使频率同步的频率同步器,用于 从由频率同步器同步的信号中检测发送符号;以及剩余相位检测器,用于补偿从信号检测单元输出的发送符号的残余相位,并输出所得到的发送符号。 频率同步器能够通过使用改进的CORDIC算法最小化由副载波同步引起的时间延迟来精确和有效地补偿频率偏移。

    Self-calibration method for use in a mobile transceiver
    2.
    发明申请
    Self-calibration method for use in a mobile transceiver 有权
    用于移动收发器的自校准方法

    公开(公告)号:US20070092023A1

    公开(公告)日:2007-04-26

    申请号:US11584329

    申请日:2006-10-20

    IPC分类号: H04L27/10

    摘要: A method is provided for self-calibrating the mismatch and the direct current (DC) offset occurring in a mobile transceiver. The transmitter of the mobile terminal is used as a signal generator and the receiver thereof is used as a response characteristic measurer. The baseband processor calibrates the mismatch and the DC offset for the receiving and transmitting sides using a test signal received from the transmitter. When multiple input subcarriers are used in a mixer present on a reception stage, self-calibration is performed using multiple received test signals obtained from one transmission test signal.

    摘要翻译: 提供了一种用于自校准在移动收发器中出现的失配和直流(DC)偏移的方法。 移动终端的发射机用作信号发生器,其接收机用作响应特性测量器。 基带处理器使用从发送器接收的测试信号来校准接收和发送端的失配和直流偏移。 当在接收台上存在的混频器中使用多个输入副载波时,使用从一个发送测试信号获得的多个接收的测试信号进行自校准。

    Dividing method and apparatus
    5.
    发明申请
    Dividing method and apparatus 审中-公开
    划分方法和装置

    公开(公告)号:US20070214203A1

    公开(公告)日:2007-09-13

    申请号:US11707618

    申请日:2007-02-16

    IPC分类号: G06F17/14

    CPC分类号: G06F7/535 G06F7/5446

    摘要: A dividing apparatus and method using coordinate rotation is disclosed. To this end, a plurality of rotation stages are sequentially performed until a divisor reaches a criterion and a rotation direction used in each of the plurality of stages is output. A division result acquired by performing rotation with respect to a dividend using the rotation direction for each of the plurality of stages is output.

    摘要翻译: 公开了一种使用坐标旋转的分割装置和方法。 为此,顺序执行多个旋转台,直到除数达到标准,并且输出在多个级中的每一个中使用的旋转方向。 输出通过使用针对多个级中的每一个的旋转方向执行关于分红的旋转获得的分割结果。

    Hybrid duplex apparatus and method for supporting low-complexity terminal in wireless communication system
    7.
    发明申请
    Hybrid duplex apparatus and method for supporting low-complexity terminal in wireless communication system 审中-公开
    用于在无线通信系统中支持低复杂度终端的混合双工设备和方法

    公开(公告)号:US20080119145A1

    公开(公告)日:2008-05-22

    申请号:US11986449

    申请日:2007-11-21

    IPC分类号: H04B1/02

    CPC分类号: H04B1/406 H04B1/0071

    摘要: Hybrid Duplex (DUAL MODE) apparatus and method for supporting a low-complexity terminal in a wireless communication system are provided. The apparatus includes a frequency generator and controller for selecting a frequency for one of the dual mode according to a scheduling and generating a control signal for a Duplexer/Switch switching to the selected mode; and a reconfigurable radio frequency (RF) filter/mixer for up-converting an input intermediate frequency (IF) signal to an RF signal using the selected frequency. Accordingly, the DUAL MODE service of the low-complexity terminal can be supported effectively.

    摘要翻译: 提供了一种用于在无线通信系统中支持低复杂度终端的混合双工(DUAL MODE)装置和方法。 该装置包括频率发生器和控制器,用于根据调度选择双模式之一的频率,并产生用于双工器/交换机切换到选择模式的控制信号; 以及用于使用所选择的频率将输入中频(IF)信号上变频到RF信号的可重配置射频(RF)滤波器/混频器。 因此,可以有效地支持低复杂度终端的DUAL MODE业务。

    Method and apparatus for self-calibration in a mobile transceiver
    10.
    发明申请
    Method and apparatus for self-calibration in a mobile transceiver 审中-公开
    移动收发机中自校准的方法和装置

    公开(公告)号:US20070159162A1

    公开(公告)日:2007-07-12

    申请号:US11636083

    申请日:2006-12-08

    IPC分类号: G01R31/28

    CPC分类号: H04B17/0085 H04B17/21

    摘要: Disclosed is a method and an apparatus for self-calibrating a Direct Current (DC) offset and an imbalance between orthogonal signals, which may occur in a mobile transceiver. In the apparatus, a transmitter of a mobile terminal functions as a signal generator, and a receiver of the mobile terminal functions as a response characteristic detector. Further, a baseband processor applies test signals to the transmitter, receives the test signals returning from the receiver, and compensates the imbalance and DC offset for the transmitter side and the receiver side by using the test signals. The test signal is applied to only one of the I channel path and the Q channel path, and an RF band signal output from the transmission side by the test signal is used as an input signal to the reception side.

    摘要翻译: 公开了用于自校准直流(DC)偏移和正交信号之间的不平衡的方法和装置,其可能发生在移动收发器中。 在该装置中,移动终端的发射机用作信号发生器,移动终端的接收机用作响应特性检测器。 此外,基带处理器将测试信号施加到发射机,接收从接收机返回的测试信号,并且通过使用测试信号来补偿发射机侧和接收机侧的不平衡和DC偏移。 测试信号仅施加到I信道路径和Q信道路径中的一个,并且通过测试信号从发送侧输出的RF频带信号被用作到接收侧的输入信号。