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    • 8. 发明申请
    • DOPPLER COMPENSATED RECEIVER
    • 多普勒补偿接收器
    • WO2005008274A1
    • 2005-01-27
    • PCT/US2004/021656
    • 2004-07-07
    • SANDBRIDGE TECHNOLOGIES, INC.
    • IANCU, DanielGLOSSNER, John, C.HOKENEK, ErdemMOUDGILL, MayanKOTLYAR, Vladimir
    • G01S1/00
    • G01S19/37G01S19/29Y10S367/904
    • A receiver includes a controller which receives A/D sampled input signals and shifts the sampled digital signal to compensate for Doppler effect in the input signal prior to demodulation. The controller compensates for a Doppler increased frequency by shifting the sampled digital signal so as to skip a sample period every n samples. This may be achieved by decreasing a cycle of m samples by one sample period every n samples. The controller compensates for a Doppler decreased frequency by shifting the sampled digital signal so as to add a sample period every n samples. This may be achieved by repeating a sample every n samples to shift the sampled digital signal. The compensation is performed in software on a multi-threaded processor.
    • 接收机包括控制器,其接收A / D采样输入信号并移位采样的数字信号以补偿在解调之前的输入信号中的多普勒效应。 控制器通过移位采样的数字信号来补偿多普勒增加的频率,以便每n个样本跳过采样周期。 这可以通过每n个样本减少一个采样周期的m个采样来实现。 控制器通过移位采样的数字信号来补偿多普勒降低的频率,以便每n个样本添加采样周期。 这可以通过每n个样本重复样本来实现,以移位采样的数字信号。 补偿在多线程处理器的软件中执行。
    • 9. 发明申请
    • APPARATUS FOR DOPPLER CORRECTION IN A WIRELESS COMMUNICATIONS SYSTEM
    • 无线通信系统中多普勒校正的设备
    • WO01017129A1
    • 2001-03-08
    • PCT/US2000/023945
    • 2000-08-30
    • H04B7/01H04B7/208
    • H04B7/208H04B7/01Y10S367/904
    • Apparatus for Doppler correction in a wireless communications system (100), including a first frequency synthesizer (402A) for generating a carrier signal (210) oscillating at a rate responsive to a first input (424), a counter coupled (404) to the first input (424) for generating a Doppler compensation signal (426), the counter (404) having a clock input, and a second frequency synthesizer (401B) coupled to the clock input for generating a clock signal (420) oscillating at a rate responsive to a rate input (422). The rate input (422) is adjusted over time according to a predetermined sequence so that the Doppler compensation signal (426) compensates for the Doppler effect experienced by, for example, ground-to-satellite communications in a satellite communications system.
    • 一种用于无线通信系统(100)中的多普勒校正的设备,包括用于产生以响应于第一输入(424)的速率振荡的载波信号(210)的第一频率合成器(402A),与 用于产生多普勒补偿信号(426)的第一输入(424),具有时钟输入的计数器(404)和耦合到时钟输入的第二频率合成器(401B),用于产生以速率振荡的时钟信号(420) 响应速率输入(422)。 速率输入(422)根据预定的顺序随时间被调整,使得多普勒补偿信号(426)补偿由例如卫星通信系统中的地对卫星通信所经历的多普勒效应。