公开(公告)号：US07697911B2

公开(公告)日：2010-04-13

申请号：US11608449

申请日：2006-12-08

申请人： Yhean-Sen Lai ,  Robert C. Malkemes ,  Jie Song ,  Denis P. Orlando ,  Inseop Lee

发明人： Yhean-Sen Lai ,  Robert C. Malkemes ,  Jie Song ,  Denis P. Orlando ,  Inseop Lee

IPC分类号： H04B1/06

CPC分类号： H04H40/90

摘要： An SDARS receiver includes an analog front end configured to receive a composite signal. An A/D converter is coupled to the analog front end and converts the signal to a digitized signal. A digital down converter (DDC) is coupled to the A/D converter and down converts the digitized signal to a down converted signal. A demodulator demodulates the down converted signal. The receiver includes a digital automatic gain control (DAGC) coupled to an output of the A/D converter and before the demodulator. An automatic gain controller is coupled to the DAGC for providing an automatic gain control signal.

摘要翻译： SDARS接收机包括被配置为接收复合信号的模拟前端。 A / D转换器耦合到模拟前端，并将信号转换为数字化信号。 数字下变频器（DDC）耦合到A / D转换器，并将数字化信号下变频为下变频信号。 解调器解调下变频信号。 接收机包括耦合到A / D转换器的输出端和解调器之前的数字自动增益控制（DAGC）。 自动增益控制器耦合到DAGC以提供自动增益控制信号。

公开(公告)号：US20080139110A1

公开(公告)日：2008-06-12

申请号：US11608449

申请日：2006-12-08

申请人： Yhean-Sen Lai ,  Robert C. Malkemes ,  Jie Song ,  Denis P. Orlando ,  Inseop Lee

发明人： Yhean-Sen Lai ,  Robert C. Malkemes ,  Jie Song ,  Denis P. Orlando ,  Inseop Lee

IPC分类号： H04H20/74

CPC分类号： H04H40/90

摘要： An SDARS receiver includes an analog front end configured to receive a composite signal. An A/D converter is coupled to the analog front end and converts the signal to a digitized signal. A digital down converter (DDC) is coupled to the A/D converter and down converts the digitized signal to a down converted signal. A demodulator demodulates the down converted signal. The receiver includes a digital automatic gain control (DAGC) coupled to an output of the A/D converter and before the demodulator. An automatic gain controller is coupled to the DAGC for providing an automatic gain control signal.

摘要翻译： SDARS接收机包括被配置为接收复合信号的模拟前端。 A / D转换器耦合到模拟前端，并将信号转换为数字化信号。 数字下变频器（DDC）耦合到A / D转换器，并将数字化信号下变频为下变频信号。 解调器解调下变频信号。 接收机包括耦合到A / D转换器的输出端和解调器之前的数字自动增益控制（DAGC）。 自动增益控制器耦合到DAGC以提供自动增益控制信号。

公开(公告)号：US08391384B2

公开(公告)日：2013-03-05

申请号：US13085525

申请日：2011-04-13

申请人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

发明人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

IPC分类号： H04K27/00

CPC分类号： H04L27/0008 ,  H03G3/3068 ,  H03G3/3078 ,  H04L27/2649

摘要： An improved multi-channel receiver for satellite broadcast applications or the like. In an exemplary embodiment, a primary AGC loop controls an analog sub-receiver adapted to simultaneously receive multiple signals. Multiple digital demodulators, coupled to the sub-receiver, demodulate the multiple received signals. Multiple secondary AGC loops, one for each received signal, compensate for variations in demodulated signal strengths caused by the primary AGC loop. A feed-forward AGC compensation technique generates scalar control values for scaling the demodulated signals before the demodulated signals are processed by the secondary AGC loops. This at least partially compensates for gain variations caused by the primary AGC, reducing received signal drop-outs before the secondary AGC loops can compensate for the gain variations. Because of systemic delays in the sub-receiver and the demodulators, the scalar control values are independently timed to be coincident with the variations in the demodulated signal strengths caused by the primary AGC loop.

摘要翻译： 用于卫星广播应用的改进的多频道接收机等。 在示例性实施例中，主AGC环路控制适于同时接收多个信号的模拟子接收机。 耦合到子接收机的多个数字解调器解调多个接收信号。 多个次级AGC环路，每个接收信号一个补偿由主AGC环路引起的解调信号强度的变化。 前馈AGC补偿技术产生标量控制值，用于在解调后的信号由次级AGC环路处理之前缩放解调信号。 这至少部分地补偿由主AGC引起的增益变化，在次级AGC环路可以补偿增益变化之前减少接收信号丢失。 由于子接收机和解调器中的系统延迟，标量控制值被独立地定时以与由主AGC环路引起的解调信号强度的变化一致。

公开(公告)号：US07809343B2

公开(公告)日：2010-10-05

申请号：US11796006

申请日：2007-04-25

申请人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

发明人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

IPC分类号： H04B7/00 ,  H04M1/00

CPC分类号： H04L27/2647 ,  H04L5/0007

摘要： An improved multi-channel receiver for satellite broadcast applications or the like. In an exemplary embodiment, an AGC loop, under the control of an AGC processor, controls the gain of an analog sub-receiver adapted to simultaneously receive multiple signals to achieve a desired AGC setpoint signal intensity from the sub-receiver. Multiple digital demodulators, coupled to the sub-receiver by an analog-to-digital converter (ADC), demodulate the multiple received signals. The AGC controller, based upon which of the received signals are being demodulated, selects the desired AGC setpoint from a table of setpoints. The AGC controller may also provide selective power control to circuitry in the receiver and select the resolution of the ADC. The controller updates the AGC loop with step values selected from a group of values by an AGC control algorithm. Different groups of step values may be used by the controller depending on whether the signals are fading or not.

公开(公告)号：US20080267326A1

公开(公告)日：2008-10-30

申请号：US11796006

申请日：2007-04-25

申请人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

发明人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

IPC分类号： H04L27/08

CPC分类号： H04L27/2647 ,  H04L5/0007

摘要： An improved multi-channel receiver for satellite broadcast applications or the like. In an exemplary embodiment, an AGC loop, under the control of an AGC processor, controls the gain of an analog sub-receiver adapted to simultaneously receive multiple signals to achieve a desired AGC setpoint signal intensity from the sub-receiver. Multiple digital demodulators, coupled to the sub-receiver by an analog-to-digital converter (ADC), demodulate the multiple received signals. The AGC controller, based upon which of the received signals are being demodulated, selects the desired AGC setpoint from a table of setpoints. The AGC controller may also provide selective power control to circuitry in the receiver and select the resolution of the ADC. The controller updates the AGC loop with step values selected from a group of values by an AGC control algorithm. Different groups of step values may be used by the controller depending on whether the signals are fading or not.

公开(公告)号：US20110188489A1

公开(公告)日：2011-08-04

申请号：US13085525

申请日：2011-04-13

申请人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

发明人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

IPC分类号： H04B1/06 ,  H04J1/00

CPC分类号： H04L27/0008 ,  H03G3/3068 ,  H03G3/3078 ,  H04L27/2649

摘要： An improved multi-channel receiver for satellite broadcast applications or the like. In an exemplary embodiment, a primary AGC loop controls an analog sub-receiver adapted to simultaneously receive multiple signals. Multiple digital demodulators, coupled to the sub-receiver, demodulate the multiple received signals. Multiple secondary AGC loops, one for each received signal, compensate for variations in demodulated signal strengths caused by the primary AGC loop. A feed-forward AGC compensation technique generates scalar control values for scaling the demodulated signals before the demodulated signals are processed by the secondary AGC loops. This at least partially compensates for gain variations caused by the primary AGC, reducing received signal drop-outs before the secondary AGC loops can compensate for the gain variations. Because of systemic delays in the sub-receiver and the demodulators, the scalar control values are independently timed to be coincident with the variations in the demodulated signal strengths caused by the primary AGC loop.

摘要翻译： 用于卫星广播应用的改进的多频道接收机等。 在示例性实施例中，主AGC环路控制适于同时接收多个信号的模拟子接收机。 耦合到子接收机的多个数字解调器解调多个接收信号。 多个次级AGC环路，每个接收信号一个补偿由主AGC环路引起的解调信号强度的变化。 前馈AGC补偿技术产生标量控制值，用于在解调后的信号由次级AGC环路处理之前缩放解调信号。 这至少部分地补偿由主AGC引起的增益变化，在次级AGC环路可以补偿增益变化之前减少接收信号丢失。 由于子接收机和解调器中的系统延迟，标量控制值被独立地定时以与由主AGC环路引起的解调信号强度的变化一致。

公开(公告)号：US07978773B2

公开(公告)日：2011-07-12

申请号：US11648702

申请日：2006-12-29

申请人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

发明人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

IPC分类号： H04K27/00

CPC分类号： H04L27/0008 ,  H03G3/3068 ,  H03G3/3078 ,  H04L27/2649

摘要： An improved multi-channel receiver for satellite broadcast applications or the like. In an exemplary embodiment, a primary AGC loop controls an analog sub-receiver adapted to simultaneously receive multiple signals. Multiple digital demodulators, coupled to the sub-receiver, demodulate the multiple received signals. Multiple secondary AGC loops, one for each received signal, compensate for variations in demodulated signal strengths caused by the primary AGC loop. A feed-forward AGC compensation technique generates scalar control values for scaling the demodulated signals before the demodulated signals are processed by the secondary AGC loops. This at least partially compensates for gain variations caused by the primary AGC, reducing received signal drop-outs before the secondary AGC loops can compensate for the gain variations. Because of systemic delays in the sub-receiver and the demodulators, the scalar control values are independently timed to be coincident with the variations in the demodulated signal strengths caused by the primary AGC loop.

摘要翻译： 用于卫星广播应用的改进的多频道接收机等。 在示例性实施例中，主AGC环路控制适于同时接收多个信号的模拟子接收机。 耦合到子接收机的多个数字解调器解调多个接收信号。 多个次级AGC环路，每个接收信号一个补偿由主AGC环路引起的解调信号强度的变化。 前馈AGC补偿技术产生标量控制值，用于在解调后的信号由次级AGC环路处理之前缩放解调信号。 这至少部分地补偿由主AGC引起的增益变化，在次级AGC环路可以补偿增益变化之前减少接收信号丢失。 由于子接收机和解调器中的系统延迟，标量控制值被独立地定时以与由主AGC环路引起的解调信号强度的变化一致。

公开(公告)号：US20080268798A1

公开(公告)日：2008-10-30

申请号：US11789550

申请日：2007-04-25

申请人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

发明人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

IPC分类号： H04Q7/20

CPC分类号： H03G3/3078

摘要： An improved multi-channel receiver for satellite broadcast applications or the like. In an exemplary embodiment, an AGC loop, under the control of an AGC processor, controls the gain of an analog sub-receiver adapted to simultaneously receive multiple signals to achieve a desired AGC setpoint signal intensity from the sub-receiver. Multiple digital demodulators, coupled to the sub-receiver by an analog-to-digital converter (ADC), demodulate the multiple received signals. The AGC controller, based upon which of the received signals are being demodulated, selects the desired AGC setpoint from a table of setpoints. The AGC controller may also provide selective power control to circuitry in the receiver and select the resolution of the ADC. The controller updates the AGC loop with step values selected from a group of values by an AGC control algorithm. Different groups of step values may be used by the controller depending on whether the signals are fading or not.

摘要翻译： 用于卫星广播应用的改进的多频道接收机等。 在示例性实施例中，在AGC处理器的控制下的AGC环路控制适于同时接收多个信号以从子接收机实现期望的AGC设定点信号强度的模拟子接收机的增益。 通过模数转换器（ADC）耦合到子接收器的多个数字解调器解调多个接收信号。 AGC控制器基于哪个接收信号被解调，从设定点表中选择所需的AGC设定点。 AGC控制器还可以向接收机中的电路提供选择性功率控制，并选择ADC的分辨率。 控制器通过AGC控制算法从具有一组值的步长值更新AGC环路。 根据信号是否衰减，控制器可以使用不同的步进值组。

公开(公告)号：US07852133B2

公开(公告)日：2010-12-14

申请号：US12159246

申请日：2007-09-28

申请人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

发明人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

IPC分类号： H03L7/06

CPC分类号： H03L7/10 ,  H03L7/0991 ,  H04L2027/0046

摘要： A method for extending a tracking range of a PLL includes the steps of: establishing an initial tracking window of the PLL, the tracking window having a first width associated therewith; and dynamically adjusting the tracking window of the PLL within an extended tracking range when a frequency of an input signal supplied to the PLL is outside of the tracking window, the extended tracking range having a second width associated therewith which is greater than the first width.

摘要翻译： 用于扩展PLL的跟踪范围的方法包括以下步骤：建立PLL的初始跟踪窗口，跟踪窗口具有与之相关联的第一宽度; 以及当提供给所述PLL的输入信号的频率在所述跟踪窗口之外时，在扩展跟踪范围内动态调整所述PLL的跟踪窗口，所述扩展跟踪范围具有大于所述第一宽度的第二宽度。

公开(公告)号：US20100253400A1

公开(公告)日：2010-10-07

申请号：US12159246

申请日：2007-09-28

申请人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

发明人： Yhean-Sen Lai ,  Jie Song ,  Zhenyu Wang ,  Jinguo Yu

IPC分类号： H03L7/08

CPC分类号： H03L7/10 ,  H03L7/0991 ,  H04L2027/0046

摘要： A method for extending a tracking range of a PLL includes the steps of: establishing an initial tracking window of the PLL, the tracking window having a first width associated therewith; and dynamically adjusting the tracking window of the PLL within an extended tracking range when a frequency of an input signal supplied to the PLL is outside of the tracking window, the extended tracking range having a second width associated therewith which is greater than the first width.

摘要翻译： 用于扩展PLL的跟踪范围的方法包括以下步骤：建立PLL的初始跟踪窗口，跟踪窗口具有与之相关联的第一宽度; 以及当提供给所述PLL的输入信号的频率在所述跟踪窗口之外时，在扩展跟踪范围内动态调整所述PLL的跟踪窗口，所述扩展跟踪范围具有大于所述第一宽度的第二宽度。