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    • 11. 发明授权
    • Preambles in OFDMA system
    • OFDMA系统中的前缀
    • US08340072B2
    • 2012-12-25
    • US13114579
    • 2011-05-24
    • Jianglei MaHang ZhangWen TongMing JiaPeiying ZhuMo-Han Fong
    • Jianglei MaHang ZhangWen TongMing JiaPeiying ZhuMo-Han Fong
    • H04W72/04
    • H04L27/2692H04B7/02H04B7/0452H04L5/0007H04L5/0023H04L5/0048H04L7/043H04L27/2613H04L27/265H04L27/2655H04L27/2686H04W24/02
    • The present invention provides a preamble that is inserted into an OFDMA frame and has a common sequence for all the base stations participating in a transmission. The subscriber station performs fine synchronization using the common sequence on the common preamble, and the resulting peaks will provide the locations of candidate base stations. The base station specific search is then performed in the vicinities of those peaks by using base station specific pseudo-noise sequences. With this two stage cell search, the searching window is drastically reduced. The preamble is matched to known values by a respective receiver to decode the signals and permit multiple signals to be transferred from the transmitter to the receiver. The preamble may comprise two parts, Preamble-I and Preamble-2, which may be used in different systems, including multioutput, multi-input (MIMO) systems.
    • 本发明提供插入到OFDMA帧中并具有参与传输的所有基站的公共序列的前同步码。 用户站使用公共前导码上的公共序列执行精细同步,并且所得到的峰值将提供候选基站的位置。 然后通过使用基站专用伪噪声序列,在那些峰附近执行基站专用搜索。 通过这两个阶段的单元格搜索,搜索窗口大大减少。 前导码由相应的接收机与已知值匹配以对信号进行解码,并允许多个信号从发射机传送到接收机。 前导码可以包括两个部分,即前导码1和前导码2,其可以在不同的系统中使用,包括多输入多输入(MIMO)系统。
    • 14. 发明授权
    • Method and apparatus for channel quality measurements
    • 用于信道质量测量的方法和装置
    • US08170155B2
    • 2012-05-01
    • US12839836
    • 2010-07-20
    • Ming JiaJianglei MaPeiying ZhuDong-Sheng YuWen Tong
    • Ming JiaJianglei MaPeiying ZhuDong-Sheng YuWen Tong
    • H03D1/00H04L27/06
    • H04L1/0631H04L1/0003H04L1/0009H04L1/0036H04L1/208H04L5/0023H04L5/0048H04L5/0053H04L25/0226H04L25/0236H04L25/03318H04L25/067
    • A method and apparatus are provided for measuring channel quality over which has been transmitted a sequence of symbols produced by encoding and constellation mapping a source data element sequence. The method includes receiving a sequence of received symbols over the channel whose quality is to be measured. The sequence of received symbols is de-mapped based on a first channel quality indicator previously transmitted to a transmitter of the sequence of symbols. The method also includes decoding the de-mapped symbols to produce a decoded output sequence. In some embodiments, the decoding may be based on the first channel quality indicator. The method also includes re-encoding the decoded output sequence to produce a re-encoded output sequence. The method also includes correlating the de-mapped symbols with the re-encoded output sequence to produce a second channel quality indicator. The second channel quality indicator is transmitted to the transmitter to adaptively select a type of mapping based on the second channel quality indicator. In some embodiments, the transmitter may adaptively select a type of encoding based on the second channel quality indicator.
    • 提供了一种用于测量已经发送了通过对源数据元素序列进行编码和星座映射而产生的符号序列的信道质量的方法和装置。 该方法包括在其质量要被测量的信道上接收接收到的符号序列。 基于先前发送到符号序列的发射机的第一信道质量指示符来对接收符号的序列进行解映射。 该方法还包括对解映射符号进行解码以产生解码的输出序列。 在一些实施例中,解码可以基于第一信道质量指示符。 该方法还包括对解码的输出序列进行重新编码以产生重新编码的输出序列。 该方法还包括将去映射符号与重新编码的输出序列相关联以产生第二信道质量指示符。 第二信道质量指示符被发送到发射机,以基于第二信道质量指示符自适应地选择一种类型的映射。 在一些实施例中,发射机可以基于第二信道质量指示符自适应地选择一种类型的编码。
    • 17. 发明授权
    • Multi-antenna scheduling system and method
    • 多天线调度系统及方法
    • US08050697B2
    • 2011-11-01
    • US11843098
    • 2007-08-22
    • Ming JiaJianglei MaJianming WuPeiying ZhuWen Tong
    • Ming JiaJianglei MaJianming WuPeiying ZhuWen Tong
    • H04B7/00
    • H04W72/082H04B7/0417H04B7/0443H04B7/0452H04B7/0632H04W72/1231
    • A wireless communication method and system using virtual MIMO (“V-MIMO”) are provided. Post processing signal to interference and noise ratios (“SINR”) for a plurality of signals corresponding to a plurality of mobile terminals arranged as a V-MIMO group are estimated. The one of the plurality of mobile terminals having the highest post processing SINR is selected. Wireless communication for the selected mobile terminal is scheduled. The signal corresponding to the selected mobile terminal is cancelled. Post processing signal to interference and noise ratios (“SINR”) for the signals corresponding to the remaining mobile terminals is re-estimated. The one of the remaining mobile terminals having the highest post processing SINR is selected. Wireless communication for the selected remaining mobile terminal is scheduled.
    • 提供了一种使用虚拟MIMO(“V-MIMO”)的无线通信方法和系统。 估计与排列为V-MIMO组的多个移动终端对应的多个信号的后处理信号与干扰和噪声比(“SINR”)。 选择具有最高后处理SINR的多个移动终端中的一个。 安排所选移动终端的无线通信。 对应于所选移动终端的信号被取消。 重新估计对应于其余移动终端的信号的后处理信号与干扰和噪声比(“SINR”)。 选择具有最高后处理SINR的剩余移动终端中的一个。 调度所选择的剩余移动终端的无线通信。