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    • 32. 发明申请
    • TDMA WIRELESS COMMUNICATIONS SYSTEM AND RELATED METHODS
    • TDMA无线通信系统及相关方法
    • US20130265933A1
    • 2013-10-10
    • US13441195
    • 2012-04-06
    • Nelson H. Powell IIINick Andrew Van Stralen
    • Nelson H. Powell IIINick Andrew Van Stralen
    • H04J3/06
    • H04W56/0015
    • A wireless communications system may include wireless communications devices communicating with one another via time division multiple access (TDMA). The wireless communications devices may include a time master device that may transmit a first synchronization message, a first maintenance message, and a timing head relay designation message. The wireless communications devices also include a timing head relay device corresponding to the timing head relay designation and may receive the first synchronization message, first maintenance message and timing head relay designation message. The timing head relay device may also transmit a second synchronization message and a second maintenance message. The wireless communications devices may also include a time forwarding device that may receive the second synchronization message and the second maintenance message, transmit a third synchronization message when a downstream wireless communications device is outside a range of the timing head relay device, and transmit a third maintenance message.
    • 无线通信系统可以包括经由时分多址(TDMA)彼此通信的无线通信设备。 无线通信设备可以包括可以发送第一同步消息,第一维护消息和定时头中继指定消息的时间主设备。 无线通信设备还包括对应于定时头中继指定的定时头中继设备,并且可以接收第一同步消息,第一维护消息和定时头中继指定消息。 定时头中继装置还可以发送第二同步消息和第二维护消息。 无线通信设备还可以包括可以接收第二同步消息和第二维护消息的时间转发设备,当下游无线通信设备在定时头中继设备的范围之外时,发送第三同步消息,并且发送第三同步消息 维护信息。
    • 35. 发明授权
    • Phase tracking apparatus and method for continuous phase modulated signals
    • 用于连续相位调制信号的相位跟踪装置和方法
    • US06721366B1
    • 2004-04-13
    • US09552029
    • 2000-04-19
    • Nick Andrew Van Stralen
    • Nick Andrew Van Stralen
    • H04L512
    • H04L25/03273H04L27/2277H04L2027/0028H04L2027/004H04L2027/0055H04L2027/0067
    • A method establishes a phase reference signal for trellis demodulating CPM modulated received signals by using phase reference signals and symbol timing estimates. Branch metrics signals representing the highest-probability path through the trellis are calculated to produce beat estimates of the modulation data. The branch metrics signals are phase shifted to produce phase shifted branch metrics (PSBM) for each path. At each symbol interval, the highest probability PSEM (HPPSBM) signal for the path is selected. The selected phase shifted branch metric adjusts the value of the phase reference signals. Another method estimates the transmitted signal from at least the estimated data and the phase reference signal. The estimated transmitted signal is phase shifted to produce phase shifted estimated transmitted signals, which are correlated with the received data signals to produce phase error signals, which are smoothed and correct the phase reference signal.
    • 一种方法通过使用相位参考信号和符号定时估计建立用于网格解调CPM调制接收信号的相位参考信号。 计算表示通过网格的最高概率路径的分支度量信号,以产生调制数据的节拍估计。 分支度量信号被相移以产生每个路径的相移分支度量(PSBM)。 在每个符号间隔,选择路径的最高概率PSEM(HPPSBM)信号。 所选择的相移分支度量调整相位参考信号的值。 另一种方法估计来自至少估计数据和相位参考信号的发射信号。 估计的发射信号被相移以产生相移的估计的发射信号,其与接收的数据信号相关,以产生相位误差信号,其被平滑并校正相位参考信号。
    • 37. 发明授权
    • Method and apparatus for filtering digital television signals
    • 数字电视信号滤波方法和装置
    • US6122015A
    • 2000-09-19
    • US206409
    • 1998-12-07
    • Naofal Mohammed Wassel Al-DhahirJohn Erik HersheyNick Andrew Van StralenRichard Louis FreyMark Lewis Grabb
    • Naofal Mohammed Wassel Al-DhahirJohn Erik HersheyNick Andrew Van StralenRichard Louis FreyMark Lewis Grabb
    • H04N5/21H04N5/213
    • H04N5/211Y10S348/914
    • A system for filtering digital television signals is provided. The system comprises a generator for providing a first data sequence to a private data packetizer, and a transmitter for transmitting the packetized first data sequence in a data channel of a digital television signal. The system further includes a receiver for receiving the digital television signal and recovering the first data sequence. The receiver includes a channel estimator for providing an estimate of channel characteristics, such as estimated channel impulse estimate and estimated noise variance. The receiver further includes an adaptive equalizer filter having an input for receiving the digital television signal and an input for receiving adaptive filter coefficients. The receiver further includes a coefficient processor for calculating adaptive filter coefficients based on the channel estimate, and providing the adaptive filter coefficients to the adaptive equalizer filter. The digital television signal is thus filtered to remove undesired channel effects.
    • 提供了一种用于过滤数字电视信号的系统。 该系统包括用于向专用数据分组器提供第一数据序列的发生器和用于在数字电视信号的数据信道中发送分组化的第一数据序列的发射机。 该系统还包括用于接收数字电视信号并恢复第一数据序列的接收机。 接收机包括用于提供信道特性的估计的信道估计器,例如估计的信道脉冲估计和估计的噪声方差。 接收机还包括具有用于接收数字电视信号的输入端和用于接收自适应滤波器系数的输入端的自适应均衡器滤波器。 接收机还包括系数处理器,用于基于信道估计来计算自适应滤波器系数,并将自适应滤波器系数提供给自适应均衡器滤波器。 因此数字电视信号被滤波以去除不需要的信道效应。
    • 38. 发明授权
    • TDMA wireless communications system and related methods
    • TDMA无线通信系统及相关方法
    • US08804603B2
    • 2014-08-12
    • US13441195
    • 2012-04-06
    • Nelson H. Powell, IIINick Andrew Van Stralen
    • Nelson H. Powell, IIINick Andrew Van Stralen
    • H04J3/08
    • H04W56/0015
    • A wireless communications system may include wireless communications devices communicating with one another via time division multiple access (TDMA). The wireless communications devices may include a time master device that may transmit a first synchronization message, a first maintenance message, and a timing head relay designation message. The wireless communications devices also include a timing head relay device corresponding to the timing head relay designation and may receive the first synchronization message, first maintenance message and timing head relay designation message. The timing head relay device may also transmit a second synchronization message and a second maintenance message. The wireless communications devices may also include a time forwarding device that may receive the second synchronization message and the second maintenance message, transmit a third synchronization message when a downstream wireless communications device is outside a range of the timing head relay device, and transmit a third maintenance message.
    • 无线通信系统可以包括经由时分多址(TDMA)彼此通信的无线通信设备。 无线通信设备可以包括可以发送第一同步消息,第一维护消息和定时头中继指定消息的时间主设备。 无线通信设备还包括对应于定时头中继指定的定时头中继设备,并且可以接收第一同步消息,第一维护消息和定时头中继指定消息。 定时头中继装置还可以发送第二同步消息和第二维护消息。 无线通信设备还可以包括可以接收第二同步消息和第二维护消息的时间转发设备,当下游无线通信设备在定时头中继设备的范围之外时,发送第三同步消息,并且发送第三同步消息 维护信息。
    • 39. 发明授权
    • Wireless network enhancements
    • 无线网络增强
    • US08687562B2
    • 2014-04-01
    • US11776716
    • 2007-07-12
    • Suresh K. IyerRobert James Mitchell, Jr.Nick Andrew Van StralenOrhan Cagri Imer
    • Suresh K. IyerRobert James Mitchell, Jr.Nick Andrew Van StralenOrhan Cagri Imer
    • H04W4/00H04J4/00H04B7/00
    • H04W74/0833H04L41/22
    • Apparatus are provided, which include a wireless transmit interface and a wireless receive interface. A payload receive processor is provided to identify a receive overhead portion from received data received via the receive interface, and it is configured to retrieve payload data in relation to the receive overhead portion in accordance with a data structure protocol. A payload transmit processor is provided to define or modify a transmit overhead portion in transmit data to be transmitted via the transmit interface. The payload transmit processor is configured to position payload data in relation to the transmit overhead portion in accordance with a data structure protocol. A controller is provided, to determine a given wireless media location defined at least in part by the controller determining a given frequency band, from among plural frequency bands, for a given data transfer, via wireless media, between a given node and a separate node.
    • 提供了包括无线传输接口和无线接收接口的装置。 提供有效载荷接收处理器以从经由接收接口接收的接收数据识别接收开销部分,并且其被配置为根据数据结构协议检索与接收开销部分相关的有效载荷数据。 提供有效负载发送处理器来定义或修改要经由发送接口发送的发送数据中的发送开销部分。 有效负载发送处理器被配置为根据数据结构协议来定位与发送开销部分相关的有效载荷数据。 提供控制器,以确定给定无线媒体位置,所述无线媒体位置至少部分地由所述控制器确定给定频带,从多个频带中,对于给定数据传输,经由无线媒体,给定节点和单独节点之间的给定数据传输 。