METHOD AND APPARATUS FOR ACQUIRING RECEPTION SYNCHRONIZATION IN LOCAL WIRELESS COMMUNICATION SYSTEM
    1.
    发明申请
    METHOD AND APPARATUS FOR ACQUIRING RECEPTION SYNCHRONIZATION IN LOCAL WIRELESS COMMUNICATION SYSTEM 审中-公开
    在本地无线通信系统中获取接收同步的方法和装置

    公开(公告)号:US20130070750A1

    公开(公告)日:2013-03-21

    申请号:US13600269

    申请日:2012-08-31

    IPC分类号: H04W56/00

    CPC分类号: H04W56/0035 H04W56/0085

    摘要: In a local wireless communication system, a reception signal including an STF (short training field) in which a plurality of patterns are repeatedly transmitted is received, the STF including a first number of STF patterns and a second number of STF patterns, the second number of STF patterns having an opposite code to that of the first number of STF patterns. In a first frequency offset estimation and correction process and a second frequency offset estimation and correction process, frequency offset estimation is performed on a plurality of STF patterns to acquire a phase error of each sample constituting the STF patterns, and the frequency of the STF patterns is corrected based on the acquired phase error. Cross correlation is performed on a predetermined number of STF patterns, among a plurality of STF patterns output subsequent to the frequency offset estimation and correction, to detect frame timing.

    摘要翻译: 在本地无线通信系统中,接收包括多个模式被重复发送的STF(短训练场)的接收信号,STF包括第一数量的STF模式和第二数量的STF模式,第二数量 的STF图案具有与第一数量的STF图案相反的代码。 在第一频率偏移估计和校正处理和第二频率偏移估计和校正处理中,对多个STF模式执行频率偏移估计,以获取构成STF模式的每个样本的相位误差,以及STF模式的频率 基于所获取的相位误差来校正。 在频率偏移估计和校正之后输出的多个STF模式中,对预定数量的STF模式执行交叉相关,以检测帧定时。

    DIGITAL PHASE-LOCKED LOOP APPARATUS USING FREQUENCY SHIFT KEYING AND METHOD OF CONTROLLING THE SAME
    2.
    发明申请
    DIGITAL PHASE-LOCKED LOOP APPARATUS USING FREQUENCY SHIFT KEYING AND METHOD OF CONTROLLING THE SAME 失效
    使用频移键控的数字相位锁定装置及其控制方法

    公开(公告)号:US20130043920A1

    公开(公告)日:2013-02-21

    申请号:US13589629

    申请日:2012-08-20

    IPC分类号: H03L7/093

    CPC分类号: H03L7/0992

    摘要: A digital phase-locked loop apparatus using FSK includes a PFD detecting phase differences between a reference clock and a frequency-divided signal, and a first adder for generating first digital control codes by adding first digital codes, second digital codes, and channel frequency codes including channel information to each other, the first digital codes being converted from time differences between first and second pulses. The apparatus further includes a digital filter correcting errors of the first digital control codes to generate second digital control codes, a DCO for varying an oscillating frequency in accordance with a digital tuning word based on the second digital control codes, and a dual modulus division unit dividing the oscillating frequency into a frequency-divided signal.

    摘要翻译: 使用FSK的数字锁相环装置包括PFD检测参考时钟和分频信号之间的相位差,以及第一加法器,用于通过将第一数字码,第二数字码和频道频率码相加来产生第一数字控制码 包括彼此的信道信息,所述第一数字码从第一和第二脉冲之间的时间差转换。 该装置还包括校正第一数字控制码的误差以产生第二数字控制码的数字滤波器,用于根据第二数字控制码根据数字调谐字改变振荡频率的DCO,以及双模分割单元 将振荡频率分频成分频信号。

    BASE STATION, TERMINAL, AND OPERATING METHOD THEREOF
    3.
    发明申请
    BASE STATION, TERMINAL, AND OPERATING METHOD THEREOF 审中-公开
    基站,终端及其操作方法

    公开(公告)号:US20120163263A1

    公开(公告)日:2012-06-28

    申请号:US13335530

    申请日:2011-12-22

    IPC分类号: H04W52/02

    摘要: A base station and a terminal for supporting a low power mode are provided. The base station transmits a first type of beacon signal for a terminal operating in a normal mode, a second type of beacon signal for a terminal operating in a low power mode, and a charging signal for a terminal in a low power mode. The terminal harvests energy from a charging signal and receives the second type of beacon signal using the harvested energy. The terminal confirms a communication request through the second type of beacon signal, enters into an active period, and communicates with the base station.

    摘要翻译: 提供了用于支持低功率模式的基站和终端。 基站发送用于在正常模式下工作的终端的第一类型的信标信号,以及以低功率模式工作的终端的第二类信标信号,以及用于低功率模式的终端的充电信号。 终端从充电信号收获能量,并使用收获的能量接收第二类型的信标信号。 终端通过第二类型的信标信号确认通信请求,进入活动期,并与基站进行通信。