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    Single path architecture & automatic gain control (SAGC) algorithm for low power SDARS receivers
    1.
    发明申请
    Single path architecture & automatic gain control (SAGC) algorithm for low power SDARS receivers 有权
    用于低功率SDARS接收机的单路径架构和自动增益控制（SAGC）算法

    公开(公告)号：US20070041481A1

    公开(公告)日：2007-02-22

    申请号：US11204631

    申请日：2005-08-16

    申请人： Robert Malkemes ,  Denis Orlando ,  Jie Song ,  Eric Zhong

    发明人： Robert Malkemes ,  Denis Orlando ,  Jie Song ,  Eric Zhong

    IPC分类号： H04L27/08

    CPC分类号： H03G3/3052 ,  H03G1/0088 ,  H04H20/22 ,  H04H40/90

    摘要： An automatic gain control (AGC) for use in a digital radio receiver that allows at least two types of input signal to be processed using a single receiver front end by supporting two modes of operation, each optimized for one particular signal type, and a third mode not optimized for either. The AGC enables smooth switching between the optimized modes of operation via the non-optimized mode. By measuring a difference in the strength between the demodulated signals, and comparing that to two preset values, the AGC which mode of operation to place the receiver in. Modes of operation are maintained by adjusting the gain of a variable gain amplifier (VGA), so that an appropriate incoming signal is amplified to a level that is suitable for an analogue-to-digital (ADC) converter. The AGC is compatible with existing satellite digital audio radio system (SDARS) transmission capabilities.

    摘要翻译： 一种在数字无线电接收机中使用的自动增益控制（AGC），其允许使用单个接收器前端来处理至少两种类型的输入信号，所述两个接收机前端通过支持针对一种特定信号类型优化的两种操作模式，以及第三种 模式未优化。 AGC可以通过非优化模式在优化的操作模式之间平滑切换。 通过测量解调信号之间的强度差，并将其与两个预设值进行比较，AGC将接收器放置在操作模式中。通过调节可变增益放大器（VGA）的增益来维持操作模式， 使得适当的输入信号被放大到适合于模数（ADC）转换器的电平。 AGC与现有的卫星数字音频无线电系统（SDARS）传输能力相兼容。

    Single path architecture and automatic gain control (SAGC) algorithm for low power SDARS receivers
    3.
    发明授权
    Single path architecture and automatic gain control (SAGC) algorithm for low power SDARS receivers 有权
    单路径架构和低功率SDARS接收机的自动增益控制（SAGC）算法

    公开(公告)号：US08260240B2

    公开(公告)日：2012-09-04

    申请号：US11204631

    申请日：2005-08-16

    申请人： Robert Malkemes ,  Denis Orlando ,  Jie Song ,  Eric Zhong

    发明人： Robert Malkemes ,  Denis Orlando ,  Jie Song ,  Eric Zhong

    IPC分类号： H04B1/06

    CPC分类号： H03G3/3052 ,  H03G1/0088 ,  H04H20/22 ,  H04H40/90

    摘要： An automatic gain control (AGC) for use in a digital radio receiver that allows at least two types of input signal to be processed using a single receiver front end by supporting two modes of operation, each optimized for one particular signal type, and a third mode not optimized for either. The AGC enables smooth switching between the optimized modes of operation via the non-optimized mode. By measuring a difference in the strength between the demodulated signals, and comparing that to two preset values, the AGC controls which mode of operation to place the receiver in. Modes of operation are maintained by adjusting the gain of a variable gain amplifier (VGA), so that an appropriate incoming signal is amplified to a level that is suitable for an analogue-to-digital (ADC) converter. The AGC is compatible with existing satellite digital audio radio system (SDARS) transmission capabilities.

    摘要翻译： 一种在数字无线电接收机中使用的自动增益控制（AGC），其允许使用单个接收器前端来处理至少两种类型的输入信号，所述两个接收机前端通过支持针对一种特定信号类型优化的两种操作模式，以及第三种 模式未优化。 AGC可以通过非优化模式在优化的操作模式之间平滑切换。 通过测量解调信号之间的强度差，并将其与两个预设值进行比较，AGC控制将接收机置于哪种操作模式。通过调整可变增益放大器（VGA）的增益来维持操作模式， ，使得适当的输入信号被放大到适合于模数（ADC）转换器的电平。 AGC与现有的卫星数字音频无线电系统（SDARS）传输能力相兼容。

    Multi-channel receiver with improved AGC
    7.
    发明授权
    Multi-channel receiver with improved AGC 失效
    具有改进AGC的多通道接收器

    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。

    Dithering scheme using multiple antennas for OFDM systems
    8.
    发明授权
    Dithering scheme using multiple antennas for OFDM systems 有权
    OFDM系统使用多个天线的抖动方案

    公开(公告)号：US08331217B2

    公开(公告)日：2012-12-11

    申请号：US12412607

    申请日：2009-03-27

    申请人： Samel Celebi ,  Jie Song ,  Paul M. Yun

    发明人： Samel Celebi ,  Jie Song ,  Paul M. Yun

    IPC分类号： H04B1/00 ,  H04J11/00

    CPC分类号： H04B7/0682 ,  H04B7/0671 ,  H04B7/18517 ,  H04W52/34

    摘要： A ground- or roof-top-based repeater in an OFDM system uses multiple transmission antennas to transmit multiple identical OFDM signals. Dithering is performed by introducing a slight variable-frequency phase offset to all but one of the multiple identical transmitted OFDM signals. The effective overall channel is more dynamic and provides spatial diversity to minimize long periods of fading in fading subchannels of the OFDM signals when the receiver is in a slow moving or stationary situation. To overcome the additional cancellation problem that can occur when two or more of the transmitting antennas are (i) in a line-of-site position with the receiver and (ii) approximately the same distance from the receiver, a delay is deliberately introduced to make the delayed signals appear to be reflected signals. This delay will not negatively impact the OFDM receiver performance as long as the delay is within the guard interval used in the OFDM process.

    摘要翻译： OFDM系统中的基于地面或屋顶的中继器使用多个发射天线来传输多个相同的OFDM信号。 通过对多个相同的发射OFDM信号中的一个引入轻微的可变频率相位偏移来执行抖动。 有效整体信道更为动态，并且当接收机处于缓慢移动或静止状态时，提供空间分集以最小化OFDM信号的衰落子信道中的衰落长时间衰落。 为了克服当两个或多个发射天线（i）处于与接收机的现场位置和（ii）与接收机大致相同的距离）时可能发生的附加消除问题，故意延迟延迟到 使延迟信号看起来是反射信号。 只要延迟在OFDM过程中使用的保护间隔内，该延迟不会对OFDM接收机性能产生负面影响。

    Multi-channel receiver with improved AGC
    9.
    发明授权
    Multi-channel receiver with improved AGC 有权

    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.

    LOW POWER MODE FOR SDARS RECEIVER
    10.
    发明申请
    LOW POWER MODE FOR SDARS RECEIVER 审中-公开
    SDARS接收器的低功耗模式

    公开(公告)号：US20090170424A1

    公开(公告)日：2009-07-02

    申请号：US11967643

    申请日：2007-12-31

    申请人： Robert Conrad Malkemes ,  Jie Song

    发明人： Robert Conrad Malkemes ,  Jie Song

    IPC分类号： H04H20/74

    CPC分类号： H04H40/90 ,  H04H20/18

    摘要： The present invention implements a method and system for receiving content in a Satellite Digital Audio Radio Service (SDARS) system. The method includes receiving a first signal stream in an SDARS receiver, the first signal stream including the SDARS content. The method further includes receiving a second signal stream in the SDARS receiver, the second signal stream including the SDARS content, the second signal stream being delayed relative to the first signal stream by a predetermined delay time. The method further includes combining the first signal stream and the second signal stream in to a composite signal that includes the SDARS content. The method further includes powering off a portion of the SDARS receiver, wherein the powering off of the portion of the SDARS receiver does not cause a disruption in the composite signal.

    摘要翻译： 本发明实现了一种在卫星数字音频无线业务（SDARS）系统中接收内容的方法和系统。 该方法包括在SDARS接收机中接收第一信号流，第一信号流包括SDARS内容。 该方法还包括在SDARS接收机中接收第二信号流，第二信号流包括SDARS内容，第二信号流相对于第一信号流延迟预定的延迟时间。 该方法还包括将第一信号流和第二信号流合并到包括SDARS内容的复合信号中。 该方法还包括断开SDARS接收机的一部分的电源，其中SDARS接收机的该部分的断电不会导致复合信号的中断。