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    • 2. 发明申请
    • METHOD AND APPARATUS FOR REMOVING DC OFFSET IN A DIRECT CONVERSION RECEIVER
    • 在直接转换接收器中移除直流偏置的方法和装置
    • WO2010065281A3
    • 2010-08-26
    • PCT/US2009064679
    • 2009-11-17
    • MOTOROLA INCSTOGNER DARRELL JRAO YADUNANDANA NRUELKE CHARLES RLAMPERT CHET A
    • STOGNER DARRELL JRAO YADUNANDANA NRUELKE CHARLES RLAMPERT CHET A
    • H04B1/30H04B17/40H03D1/04
    • H04B1/30H04L25/061
    • A method and apparatus for correcting direct current (DC) offset errors of a received signal in a direct conversion receiver (DCR) are provided. DC offset correction algorithms are incorporated into the DCR, each algorithm being optimized for a particular receive signal operating environment. The DC offset correction algorithms remove DC offset errors in baseband In-phase and Quadrature-phase signals received within the direct conversion receiver baseband signal path. Individual DC offset correction algorithms are selected for use as determined by a signal quality estimator component. A DC offset correction component of the direct conversion receiver determines an appropriate DC offset correction algorithm suited for a particular operating environment. A criterion for a signal quality estimate is set to control transitioning between DCOC algorithms. A dual threshold strategy may be adopted to transition between one DC offset correction algorithm and another DC offset correction algorithm to provide hysteresis.
    • 提供了用于校正直接转换接收机(DCR)中的接收信号的直流(DC)偏移误差的方法和装置。 DC偏移校正算法被并入到DCR中,每个算法针对特定的接收信号操作环境进行优化。 DC偏移校正算法消除了在直接转换接收机基带信号路径内接收到的基带同相和正交相信号中的直流失调误差。 选择单个DC偏移校正算法以由信号质量估计器组件确定使用。 直接转换接收机的DC偏移校正分量确定适合于特定操作环境的适当DC偏移校正算法。 设置信号质量估计的标准来控制DCOC算法之间的转换。 可以采用双阈值策略来在一个DC偏移校正算法和另一个DC偏移校正算法之间转换以提供滞后。
    • 7. 发明申请
    • METHOD FOR GENERATING A LOCATION SIGNAL
    • 生成位置信号的方法
    • WO2010074950A2
    • 2010-07-01
    • PCT/US2009067085
    • 2009-12-08
    • MOTOROLA INCRUELKE CHARLES RGONZALEZ ARMANDO JSWOPE CHARLES B
    • RUELKE CHARLES RGONZALEZ ARMANDO JSWOPE CHARLES B
    • G01S5/14
    • G01S13/825
    • A communication device uses its FGU to generate a location signal that can be used by a reference device to calibrate the communication device and to determine the distance of the communication device from the reference device. The communication device: receives, from a reference device, at least one location signal control parameter that defines pulse shape characteristics for a location signal; configures its FGU based on the at least one location signal control parameter; generates a linear first part of a phase-incoherent location signal having the defined pulse shape characteristics by progressively sweeping an output of the FGU over a range of frequencies from a first frequency to a second frequency within a first time period; and transmits at least one iteration of the first part of the location signal.
    • 通信设备使用其FGU生成位置信号,该位置信号可以被参考设备用来校准通信设备并确定通信设备与参考设备的距离。 通信设备:从参考设备接收限定位置信号的脉冲形状特征的至少一个位置信号控制参数; 基于所述至少一个位置信号控制参数来配置其FGU; 通过在第一时间段内在从第一频率到第二频率的频率范围内逐步扫描FGU的输出来生成具有限定的脉冲形状特性的相位非相干位置信号的线性第一部分; 并发送位置信号的第一部分的至少一次迭代。
    • 8. 发明申请
    • METHOD AND DEVICE FOR GENERATING A LOCATION SIGNAL
    • 用于产生位置信号的方法和装置
    • WO2010074951A3
    • 2010-10-21
    • PCT/US2009067086
    • 2009-12-08
    • MOTOROLA INCGONZALEZ ARMANDO JRUELKE CHARLES RSWOPE CHARLES B
    • GONZALEZ ARMANDO JRUELKE CHARLES RSWOPE CHARLES B
    • G01S5/02H04W4/02
    • G01S11/02
    • A frequency generation unit (FGU) in a communication device includes a voltage controlled oscillator (VCO), an adjustable filter having a capacitive element for wideband operation, a current source with variable gain, and chirp generation control circuitry (CGC) that is used to generate location signals. The FGU receives, from a reference device, at least one location signal control parameter that defines linear frequency slope characteristics for a location signal. The CGC configures, based on the at least one location signal control parameter, the gain and a polarity of the current source to generate a first current during a first time period for charging the capacitive element to generate a control signal that is coupled to the VCO to generate a first part of the location signal having the defined linear frequency slope characteristics, wherein the first part of the location signal is transmitted using a transceiver of the communication device.
    • 通信装置中的频率发生单元(FGU)包括压控振荡器(VCO),具有用于宽带操作的电容元件的可调滤波器,具有可变增益的电流源和用于使用的啁啾发生控制电路(CGC) 生成位置信号。 FGU从参考设备接收至少一个位置信号控制参数,其定义位置信号的线性频率斜率特性。 所述CGC基于所述至少一个位置信号控制参数,配置所述电流源的增益和极性,以在第一时间段期间产生第一电流,以对所述电容元件充电以产生耦合到所述VCO的控制信号 以产生具有所定义的线性频率斜率特性的定位信号的第一部分,其中使用通信设备的收发器发送位置信号的第一部分。
    • 10. 发明申请
    • METHOD AND APPARATUS FOR IMPROVING SIGNAL RECEPTION IN A RECEIVER
    • 改善接收器信号接收的方法和装置
    • WO2007127565A3
    • 2008-07-03
    • PCT/US2007065033
    • 2007-03-27
    • MOTOROLA INCSALVI RAULBOLTON JR JERRY TRUELKE CHARLES R
    • SALVI RAULBOLTON JR JERRY TRUELKE CHARLES R
    • H04L25/06
    • H04L25/062
    • A method and apparatus for improving signal reception in a receiver (100) by performing all-channel and/or on-channel estimations on a received signal so as to predict future RF environments. The prediction is achieved through the use of one or more detector systems (122, 124) positioned to sample and detect predetermined signal metrics of the received signal (103) prior to analog-to-digital conversion (112) and subsequent post-processing (114). Future estimations of the channel condition are thus generated prior to the arrival of the actual samples (115) at a controller section (116). The detectors (122, 124) provide triggers (123, 125) to the controller (116) so that active stages (130) within the receiver (100) can be adjusted and scaled as needed via a serial port interface (SPI) (126) based on signal conditions.
    • 一种用于通过对接收到的信号进行全通道和/或通道上估计来改善接收机(100)中的信号接收以便预测将来的RF环境的方法和装置。 通过使用一个或多个检测器系统(122,124)来实现预测,所述检测器系统被定位成在模数转换(112)和随后的后处理(112)之后采样和检测接收信号(103)的预定信号度量 114)。 因此,在实际样本(115)到达控制器部分(116)之前生成信道条件的未来估计。 检测器(122,124)向控制器(116)提供触发(123,125),使得可以根据需要通过串行端口接口(SPI)(126)来调整和缩放接收器(100)内的有源级(130) )基于信号条件。