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    • 3. 发明申请
    • FIRST ADJACENT CANCELLER (FAC) WITH IMPROVED BLENDING USING A PARAMETRIC FILTER
    • 使用参数滤波器改进混合的第一个相似的取景器(FAC)
    • US20150303956A1
    • 2015-10-22
    • US14257286
    • 2014-04-21
    • iBiquity Digital Corporation
    • Brian W. KroegerPaul J. Peyla
    • H04B1/10
    • H04B1/1036H04B1/109H04B2001/1045H04B2001/1063H04H20/31H04H2201/183
    • A method for processing a radio signal includes: receiving an FM in-band on-channel radio signal including a plurality of digitally modulated subcarriers in upper and lower sidebands; sampling the FM in-band on-channel radio signal to produce an input signal including complex digital samples of a combination of a desired one the upper and lower sidebands and an FM interferer; removing FM interferer components from the first signal by notch filtering to produce a notch-filtered signal; weighting the notch-filtered signal to produce a weighted notch-filtered signal; using a parametric filter to filter the input signal to produce a parametric-filtered input signal; and combining the weighted notch-filtered signal and the parametric-filtered input signal to produce an output signal. A radio receiver that implements the method is also included.
    • 一种处理无线电信号的方法包括:在上边带和下边带中接收包括多个数字调制子载波的FM带内通道无线电信号; 对FM带内通道无线电信号进行采样以产生包括上边带和下边带期望的一个组合的复数数字采样和FM干扰源的输入信号; 通过陷波滤波从第一信号中去除FM干扰源分量以产生陷波滤波信号; 加权陷波滤波信号以产生加权陷波滤波信号; 使用参数滤波器对输入信号进行滤波以产生参数滤波的输入信号; 以及组合加权陷波滤波信号和参数滤波输入信号以产生输出信号。 还包括实现该方法的无线电接收机。
    • 9. 发明申请
    • Medium loss high power IBOC combiner
    • 中档高功率IBOC组合器
    • US20090041157A1
    • 2009-02-12
    • US12217812
    • 2008-07-09
    • Derek J. Small
    • Derek J. Small
    • H04L27/20
    • H04L27/12H04H20/30H04H20/46H04H2201/183
    • A method and apparatus are disclosed for combining digital sidebands with an FM analog signal for IBOC transmission by a single antenna. Specifically, a high power filter combiner for combining an FM analog and a digital signal of the same channel, or frequency, is disclosed. The combiner has two inputs that respectively receive an FM analog and a digital signal to be transmitted in the same FM channel. The combiner has mild tuned filters interposed between the inputs and the output which are tuned to pass the FM analog signal while reflecting the digital signal such that the passed FM analog signal and the reflected digital signal combine as IBOC, i.e., an FM analog signal with digital sideband signals. The combined IBOC signal is provided at an output of the combiner, capable for transmission through a single antenna.
    • 公开了一种用于将数字边带与FM模拟信号组合以通过单个天线进行IBOC传输的方法和装置。 具体地,公开了用于组合FM模拟和相同信道或频率的数字信号的高功率滤波器组合器。 组合器有两个输入,分别接收FM模拟信号和数字信号以在相同的FM信道中传输。 组合器具有介于输入和输出之间的温和调谐滤波器,其被调谐以通过FM模拟信号同时反映数字信号,使得经过的FM模拟信号和反射数字信号组合为IBOC,即FM模拟信号与 数字边带信号。 组合的IBOC信号提供在组合器的输出端,能够通过单个天线进行传输。