公开(公告)号：US4729110A

公开(公告)日：1988-03-01

申请号：US685351

申请日：1984-12-24

申请人： Kenneth B. Welles, II ,  Sharbel E. Noujaim

发明人： Kenneth B. Welles, II ,  Sharbel E. Noujaim

IPC分类号： H03D1/22 ,  H03G3/20 ,  G06J1/00 ,  G06F15/20

CPC分类号： H03D1/2245

摘要： Sampled and digitized in-phase and quadrature phase signals are algebraically accumulated in offset accumulators, the contents of which are periodically employed to adjust the value of offset correction factors added to each signal path. Additionally, the absolute values of the in-phase and quadrature phase signals are accumulated in gain accumulators, the contents of which are periodically employed to adjust the gain factor multiplier in one of the signal paths.

摘要翻译： 采样和数字化的同相和正交相位信号在偏移累加器中被代数积累，其内容被周期性地用于调整添加到每个信号路径的偏移校正因子的值。 此外，同相和正交相位信号的绝对值被累加在增益累加器中，其内容被周期性地用于调整一个信号路径中的增益因子乘数。

公开(公告)号：US4603300A

公开(公告)日：1986-07-29

申请号：US653119

申请日：1984-09-21

申请人： Kenneth B. Welles, II ,  Sharbel E. Noujaim

发明人： Kenneth B. Welles, II ,  Sharbel E. Noujaim

IPC分类号： H03D3/00

CPC分类号： H03D3/006 ,  H03D2200/005 ,  H03D2200/0052 ,  H03D2200/0082

摘要： A frequency modulated signal is converted into a pair of baseband signals by mixing the signal with a pair of phase-quadrature reference signals of substantially carrier center frequency. The double reference frequency component of each of the baseband signals is filtered to obtain I and Q signals. The I and Q signals constitute in rectangular coordinates the components of a vector represented in polar coordinates by R and .theta. where R is the maximum amplitude of the I and Q signals and .theta. is the instantaneous angle represented by the arctangent of the I signal divided by the Q signal. The I and Q signals are sampled to provide a sequence of sets of signal samples. For each set of signal samples the angle .theta. is obtained. A sequence of changes in the values of the angle .theta. over successive sampling periods is obtained and represents the deviation in frequency of the FM carrier corresponding to changes in amplitude of the modulating signal.

摘要翻译： 通过将信号与基本上载波中心频率的一对相位正交参考信号混合，将调频信号转换成一对基带信号。 对每个基带信号的双参考频率分量进行滤波以获得I和Q信号。 I和Q信号以矩形坐标构成极坐标由R和theta表示的矢量的分量，其中R是I和Q信号的最大幅度，θ是由I信号的反正切除以 Q信号。 I和Q信号被采样以提供信号样本集合的序列。 对于每组信号样本，获得角度θ。 获得在连续采样周期上的角度θ的值的变化序列，并且表示对应于调制信号的幅度变化的FM载波的频率偏差。

公开(公告)号：US4560941A

公开(公告)日：1985-12-24

申请号：US653117

申请日：1984-09-21

申请人： Kenneth B. Welles, II ,  Sharbel E. Noujaim

发明人： Kenneth B. Welles, II ,  Sharbel E. Noujaim

IPC分类号： H03D3/00 ,  H03D7/16

CPC分类号： H03D3/007 ,  H03D2200/005 ,  H03D2200/0062 ,  H03D3/006 ,  H03D7/165

摘要： A frequency modulated signal is converted into a pair of baseband signals by mixing the signal with a pair of phase-quadrature reference signals of substantially carrier center frequency. The double reference frequency component of each of the baseband signals is filtered to obtain I and Q signals. The I and Q signals constitute in rectangular coordinates the components of a vector represented in polar coordinates by R and .theta. where R is the maximum amplitude of the I and Q signals and .theta. is the instantaneous angle represented by the arctangent of the I signal divided by the Q signal. The I and Q signals are inverted to provide respective -I and -Q signals. The I, -I, Q, -Q signals are sampled to provide a sequence of sets of signal samples. For each set of signal samples the angle .theta. is obtained. A sequence of changes in the values of the angle .theta. over successive sampling periods is obtained and represents the deviation in frequency of the FM carrier corresponding to changes in amplitude of the modulating signal.

摘要翻译： 通过将信号与基本上载波中心频率的一对相位正交参考信号混合，将调频信号转换成一对基带信号。 对每个基带信号的双参考频率分量进行滤波以获得I和Q信号。 I和Q信号以矩形坐标构成极坐标由R和theta表示的矢量的分量，其中R是I和Q信号的最大幅度，θ是由I信号的反正切除以 Q信号。 I和Q信号被反相以提供相应的-I和-Q信号。 对I，-I，Q，-Q信号进行采样，以提供一组信号样本。 对于每组信号样本，获得角度θ。 获得在连续采样周期上的角度θ的值的变化序列，并且表示对应于调制信号的幅度变化的FM载波的频率偏差。