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    • 2. 发明授权
    • Ad hoc large scale directional networks
    • 特大型定向网络
    • US07388540B1
    • 2008-06-17
    • US10853605
    • 2004-05-25
    • Scott J. F. ZoggKenneth M. PetersonMichael N. NewhouseDaniel M. Zange
    • Scott J. F. ZoggKenneth M. PetersonMichael N. NewhouseDaniel M. Zange
    • H04Q1/00H04B7/00
    • H04B17/27
    • A method for transmitting data from a transmitter to a receiver in an ad hoc large scale directional network includes the followings steps. A first training sequence is sent by a transmitter in an ad hoc directional network. The first training sequence is received by a receiver in the ad hoc directional network. The receiver determines a first apparent direction from which the first training sequence is sent. The receiver sends a second training sequence to the transmitter. The transmitter determines a second apparent direction from which the second training sequence is sent. The transmitter directs a signal with the first training sequence to the receiver. The transmitter sends the signal with the first training sequence to the receiver. The receiver receives the first training sequence. The receiver is directed to the first apparent direction to receive the signal.
    • 一种用于在自组织大规模定向网络中从发射机向接收机发送数据的方法包括以下步骤。 第一训练序列由自组织定向网络中的发射机发送。 第一训练序列由ad hoc定向网络中的接收机接收。 接收机确定发送第一训练序列的第一表观方向。 接收机向发射机发送第二训练序列。 发射机确定发送第二训练序列的第二视在方向。 发射机将具有第一训练序列的信号引导到接收机。 发射机将具有第一训练序列的信号发送到接收机。 接收器接收第一训练序列。 接收机被引导到第一表观方向以接收信号。
    • 5. 发明授权
    • Featureless synchronization in multi-user OFDM
    • 多用户OFDM中的无特征同步
    • US07280464B1
    • 2007-10-09
    • US10259767
    • 2002-09-27
    • Michael N. NewhouseDaniel M. Zange
    • Michael N. NewhouseDaniel M. Zange
    • H04J11/00
    • H04L27/2662H04L5/0007H04L5/0048H04L27/2657H04L27/2675
    • An orthogonal frequency division multiplexing (OFDM) communications system transmits data on a plurality of subcarriers and has a featureless synchronization signal. The OFDM communications system transmits synchronization tones on pseudorandomly selected subcarriers. A receiver generates the same synchronization tones and performs a correlation on the received signal with the receiver synchronization tones. The correlation is performed at the beginning and the end of the synchronization symbol. A product of the two correlations results in a magnitude peak and a phase difference. The magnitude peak is used to determine the location in time of the sync symbol and the phase difference is used to determine the frequency offset of the received signal.
    • 正交频分复用(OFDM)通信系统在多个子载波上发送数据并具有无特征同步信号。 OFDM通信系统在伪随机选择的子载波上发送同步音调。 接收机产生相同的同步音,并且用接收机同步音进行接收信号的相关。 相关性在同步符号的开始和结束时执行。 两个相关的乘积导致幅度峰值和相位差。 幅度峰值用于确定同步符号的时间位置,并且使用相位差来确定接收信号的频率偏移。