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    • 11. 发明申请
    • METHOD AND APPARATUS FOR SYSTEM SYNCHRONIZATION IN WIRELESS COMMUNICATION SYSTEMS
    • 无线通信系统中系统同步的方法与装置
    • WO2007069203A2
    • 2007-06-21
    • PCT/IB2006/054791
    • 2006-12-13
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.ZHANG, XiaoboMA, NiZHOU, Qi
    • ZHANG, XiaoboMA, NiZHOU, Qi
    • H04L5/0048H04L5/0007H04L27/2613H04L27/2655H04L27/2675
    • The invention relates to system synchronization in an orthogonal frequency division multiplexing communication system having a plurality of sub-carriers. The transmission signal provided by the invention comprises a plurality of frequency-domain symbols. Each frequency-domain symbol comprises both pilot elements and data elements that are modulated on different sub-carriers. The pilot elements in the plurality of symbols compose at least two pilot matrixes that have predefined relationship in frequency domain. At transmitting side, the plurality of symbols is transformed from frequency domain to time domain via Inverse Discrete Fourier Transform. At receiving side, the sampled time- domain symbols are transformed to frequency-domain symbols via Discrete Fourier Transform and at least two pilot matrixes having predefined relationship in frequency domain are retrieved based on pilot elements extracted from the plurality of frequency- domain symbols. Then the system synchronization can be obtained based on correlation of any two of the pilot matrixes. As the pilot timeslot carries pilot information and data information, the invention can improve transmission efficiency.
    • 本发明涉及具有多个子载波的正交频分复用通信系统中的系统同步。 本发明提供的传输信号包括多个频域符号。 每个频域符号包括在不同子载波上调制的导频元素和数据元素。 多个符号中的导频元素构成在频域中具有预定关系的至少两个导频矩阵。 在发送侧,通过离散傅里叶逆变换将多个符号从频域变换为时域。 在接收侧,通过离散傅立叶变换将采样的时域符号变换成频域符号,并且基于从多个频域符号提取的导频元素来检索具有频域中具有预定关系的至少两个导频矩阵。 然后可以基于任何两个导频矩阵的相关性来获得系统同步。 由于导频时隙携带导频信息和数据信息,本发明可以提高传输效率。
    • 14. 发明申请
    • METHOD AND APPARATUS FOR SEMI-DUPLEX COMMUNICATION IN WIRELESS COMMUNICATION SYSTEM
    • 无线通信系统中半双工通信的方法与装置
    • WO2006137005A1
    • 2006-12-28
    • PCT/IB2006/051969
    • 2006-06-20
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.MA, NiZHANG, Xiaobo
    • MA, NiZHANG, Xiaobo
    • H04Q7/28
    • H04W76/23H04W4/10H04W76/45
    • This invention disclosure proposes a semi-duplex communication method and apparatus with automatic state- switching mechanism for UE. This communication method comprises: detecting whether input information is voice information or not; if so, transmitting the voice information to another UE via a traffic channel; if not, judging whether user's speaking is finished or not; if so, transmitting a state- switching command to another UE via the traffic channel so as to receive the voice information from another UE. The method and apparatus as proposed in the present invention, using automatic state- switching mechanism to replace the current hard push action with special button, can automatically realize semi-duplex communication in wireless communication system.
    • 本发明公开提出一种具有用于UE的自动状态切换机制的半双工通信方法和装置。 该通信方法包括:检测输入信息是否是语音信息; 如果是,则经由业务信道将语音信息发送到另一个UE; 如果不是,判断用户的说话是否完成; 如果是,则经由业务信道向另一个UE发送状态切换命令,以便从另一个UE接收语音信息。 本发明提出的使用自动状态切换机构来替代当前的特殊按钮的硬推动的方法和装置可以在无线通信系统中自动实现半双工通信。