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公开(公告)号：US20090296853A1
公开(公告)日：2009-12-03
申请号：US12129681
申请日：2008-05-30
申请人： Meng-Chang Doong , Jia-Yi Chen , Thomas Lee
发明人： Meng-Chang Doong , Jia-Yi Chen , Thomas Lee
IPC分类号： H04L25/03
CPC分类号： H04L25/03834 , H04L27/2007
摘要： A transmitter architecture and method of modulation that include a rotation-direction control circuit for varying the direction of rotation of phase transitions of a phase modulation based on the occurrence of a predetermined pattern of input data. This variation of rotation direction by the rotation-direction control circuit maintains the output spectrum of a modulated signal within the spectral mask requirements of an associated communications standard and thereby enables the use of non-linear power amplifiers in applications that generally require linear amplifiers.
摘要翻译： 一种发射机结构和调制方法，其包括用于基于输入数据的预定模式的出现来改变相位调制的相变的旋转方向的旋转方向控制电路。 通过旋转方向控制电路的旋转方向的这种变化将调制信号的输出频谱维持在相关通信标准的频谱掩模要求内，从而使得能够在通常需要线性放大器的应用中使用非线性功率放大器。
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2.发明授权System and method of frequency offset compensation for radio system with fast doppler shift 有权具有快速多普勒频移的无线电系统的频偏补偿系统和方法公开(公告)号：US08913651B2
公开(公告)日：2014-12-16
申请号：US13885260
申请日：2011-10-28
申请人： Jia-Ru Li , Meng-Chang Doong
发明人： Jia-Ru Li , Meng-Chang Doong
CPC分类号： H04W24/02 , H04L27/0014 , H04L2027/0026 , H04L2027/0065
摘要： A system and method of frequency offset compensation are disclosed for a wireless system between a fast moving radio terminal associated with a locomotive and a stationary radio terminal associated with a base station. The present invention utilizes advanced frequency offset prediction to quickly track Doppler Shift caused by a fast moving locomotive. In one embodiment according to the present invention, the frequency offset prediction is based on a first plurality of coarse frequency offsets, first-order derivatives of the first plurality of coarse frequency offsets, and second-order derivatives of the first plurality of coarse frequency offsets. In another embodiment according to the present invention, the frequency offset prediction is based on a plurality of previous frequency offsets according to a Doppler shift model.
摘要翻译： 公开了一种用于在与机车相关联的快速移动无线电终端和与基站相关联的固定无线电终端之间的无线系统的频偏补偿的系统和方法。 本发明利用先进的频率偏移预测来快速跟踪由快速移动的机车引起的多普勒频移。 在根据本发明的一个实施例中，频偏预测基于第一多个粗频偏移，第一多个粗频偏移的一阶导数和第一多个粗频偏移的二阶导数 。 在根据本发明的另一个实施例中，频偏预测基于多普勒频移模型的多个先前频率偏移。
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公开(公告)号：US07702304B2
公开(公告)日：2010-04-20
申请号：US11237439
申请日：2005-09-28
IPC分类号： H04B17/02
CPC分类号： H04B7/086 , H04B7/0857 , H04B7/10 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/442 , Y02D70/444
摘要： The present invention provides a method and system for operating a wireless communication system in which received signals from a plurality of antennas are weighted and combined with a beam forming operation to form an output signal. In an embodiment of the present invention, beamforming operations are performed with maximal ratio combining (MRC) and an interference nulling algorithm (INA). The INA receives an error signal which is 180° out of phase with a combination of the channels for individual antennas, referred to as the SUM channel. The error signal is determined by complex conjugate multiplication of the individual signals and a reference complex signal. The weight amplitude is controlled by weight normalization to provide faster convergence and prevent integrator overflow.
摘要翻译： 本发明提供了一种用于操作无线通信系统的方法和系统，其中来自多个天线的接收信号被加权并与波束形成操作组合以形成输出信号。 在本发明的实施例中，以最大比组合（MRC）和干扰归零算法（INA）来执行波束形成操作。 INA接收与被称为SUM信道的各个天线的信道的组合相差180°的误差信号。 误差信号由各个信号和参考复信号的复共轭乘法确定。 重量幅度由权重归一化控制，以提供更快的收敛并防止积分器溢出。
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4.发明申请SYSTEM AND METHOD OF FREQUENCY OFFSET COMPENSATION FOR RADIO SYSTEM WITH FAST DOPPLER SHIFT 有权具有快速多普勒频移的无线电系统频率偏移补偿系统及方法公开(公告)号：US20130287080A1
公开(公告)日：2013-10-31
申请号：US13885260
申请日：2011-10-28
申请人： Jia-Ru Li , Meng-Chang Doong
发明人： Jia-Ru Li , Meng-Chang Doong
IPC分类号： H04W24/02
CPC分类号： H04W24/02 , H04L27/0014 , H04L2027/0026 , H04L2027/0065
摘要： A system and method of frequency offset compensation are disclosed for a wireless system between a fast moving radio terminal associated with a locomotive and a stationary radio terminal associated with a base station. The present invention utilizes advanced frequency offset prediction to quickly track Doppler Shift caused by a fast moving locomotive. In one embodiment according to the present invention, the frequency offset prediction is based on a first plurality of coarse frequency offsets, first-order derivatives of the first plurality of coarse frequency offsets, and second-order derivatives of the first plurality of coarse frequency offsets. In another embodiment according to the present invention, the frequency offset prediction is based on a plurality of previous frequency offsets according to a Doppler shift model.
摘要翻译： 公开了一种用于在与机车相关联的快速移动无线电终端和与基站相关联的固定无线电终端之间的无线系统的频偏补偿的系统和方法。 本发明利用先进的频率偏移预测来快速跟踪由快速移动的机车引起的多普勒频移。 在根据本发明的一个实施例中，频偏预测基于第一多个粗频偏移，第一多个粗频偏移的一阶导数和第一多个粗频偏移的二阶导数 。 在根据本发明的另一个实施例中，频偏预测基于多普勒频移模型的多个先前频率偏移。
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公开(公告)号：US20090206894A1
公开(公告)日：2009-08-20
申请号：US12032689
申请日：2008-02-17
CPC分类号： H03L7/08 , H03L7/0898 , H03L7/093 , H03L7/099 , H03L7/18
摘要： A phase-locked loop capable of being dynamically configured to optimize phase-noise performance during different modes of operation. The phase-locked loop may include a switchable charge pump, loop filter and voltage-controlled oscillator having auxiliary circuit components that may be switched in and out to achieve calibration settings for optimizing phase-noise performance for different modes of operation, while minimizing unnecessary power consumption, and without disturbing the stability of the phase-locked loop.
摘要翻译： 锁相环能够被动态地配置成在不同的操作模式下优化相位噪声性能。 锁相环可以包括可切换电荷泵，环路滤波器和压控振荡器，其具有可被切换和输出的辅助电路部件，以实现用于优化不同操作模式的相位噪声性能的校准设置，同时最小化不必要的功率 消耗，并且不影响锁相环的稳定性。
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公开(公告)号：US20060073801A1
公开(公告)日：2006-04-06
申请号：US11237439
申请日：2005-09-28
申请人： James Wang , Meng-Chang Doong
发明人： James Wang , Meng-Chang Doong
CPC分类号： H04B7/086 , H04B7/0857 , H04B7/10 , Y02D70/142 , Y02D70/144 , Y02D70/146 , Y02D70/442 , Y02D70/444
摘要： The present invention provides a method and system for operating a wireless communication system in which received signals from a plurality of antennas are weighted and combined with a beam forming operation to form an output signal. In an embodiment of the present invention, beamforming operations are performed with maximal ratio combining (MRC) and an interference nulling algorithm (INA). The INA receives an error signal which is 180° out of phase with a combination of the channels for individual antennas, referred to as the SUM channel. The error signal is determined by complex conjugate multiplication of the individual signals and a reference complex signal. The weight amplitude is controlled by weight normalization to provide faster convergence and prevent integrator overflow.
摘要翻译： 本发明提供了一种用于操作无线通信系统的方法和系统，其中来自多个天线的接收信号被加权并与波束形成操作组合以形成输出信号。 在本发明的实施例中，以最大比组合（MRC）和干扰归零算法（INA）来执行波束形成操作。 INA接收与被称为SUM信道的各个天线的信道的组合相差180°的误差信号。 误差信号由各个信号和参考复信号的复共轭乘法确定。 重量幅度由权重归一化控制，以提供更快的收敛并防止积分器溢出。
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