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    • 2. 发明申请
    • SYNTHETIC PATH DIVERSITY REPEATER
    • 合成路径多样性重复
    • WO2005004501A2
    • 2005-01-13
    • PCT/US2004/020917
    • 2004-06-28
    • QUALCOMM IncorporatedROWITCH, Douglas, Neal
    • ROWITCH, Douglas, Neal
    • H04Q
    • H04B7/155G01S2013/466H04B7/0671H04B7/10
    • A communication repeater for use in conjunction with a base transceiver subsystem (BTS) of a wireless communication system. The repeater expands the coverage area of the BTS and allows receivers to identify whether the source of a communication signal was directly from a BTS or was broadcast by a repeater. Identification of the signal source facilitates position determination, particularly in hybrid position determination systems. The repeater implements differential delay modulation of the transmitted signal. The repeater re-transmits the original BTS signal as well as a time delayed version of the signal. Additionally, the repeater introduces synthetic path diversity in the form of spatial diversity or polarity diversity to de-correlate the re-transmitted original signal from the time delayed signal. The repeater can broadcast the delayed signal with the same power as the re-transmitted original signal or can attenuate the delayed signal relative to the re-transmitted original signal.
    • 一种与无线通信系统的基站收发器子系统(BTS)一起使用的通信中继器。 中继器扩展BTS的覆盖区域,并允许接收机识别通信信号的来源是直接来自BTS还是由中继器广播。 信号源的识别有助于位置确定,特别是在混合位置确定系统中。 中继器实现发射信号的差分延迟调制。 中继器重新发送原始BTS信号以及信号的时间延迟版本。 另外,中继器以空间分集或极性分集的形式引入合成路径分集,以将来自时间延迟信号的重传的原始信号去相关。 中继器可以以与重新发送的原始信号相同的功率来广播延迟的信号,或者可以相对于再发送的原始信号来衰减延迟的信号。
    • 9. 发明申请
    • RADIO FREQUENCY (RF) SIGNAL MULTIPLEXING
    • 无线电频率(RF)信号多路复用
    • WO2009134908A1
    • 2009-11-05
    • PCT/US2009/042144
    • 2009-04-29
    • QUALCOMM INCORPORATEDBHATIA, AshokFARMER, Dominic, GerardROWITCH, Douglas, NealGROVER, DouglasRAHMAT, ArieROW, Chang, Shik
    • BHATIA, AshokFARMER, Dominic, GerardROWITCH, Douglas, NealGROVER, DouglasRAHMAT, ArieROW, Chang, Shik
    • H04B1/40H04B1/38
    • H04B1/403H04B1/3805
    • In a radio frequency (RF) receiver, a receiver RF chain is tuned to a first (e.g., global positioning system (GPS)) channel to permit receipt of a first (e.g., GPS) signal over the first (e.g., GPS) channel on the receiver RF chain during a first time duration. The receiver RF chain is tuned to a second (e.g., cellular page) channel to permit receipt of a second (e.g., cellular page) signal over the second (e.g., cellular page) channel on the receiver RF chain during a second time duration, following the first time duration. The first (e.g., GPS) signal is processed during the first time duration and the second time duration, without any apparent interruption of the first (e.g., GPS) signal during the second time duration. The processing, for example, treats the actual interruption as a temporary, short term fade of the first (e.g., GPS) signal during the second time duration, or provides a bridge signal (e.g., an estimated GPS signal on the receiver RF chain or an actual GPS signal received on another receiver RF chain) during the second time duration.
    • 在射频(RF)接收机中,接收机RF链被调谐到第一(例如,全球定位系统(GPS))信道,以允许在第一(例如,GPS)信道上接收第一(例如,GPS)信号 在第一时间段内在接收机RF链上。 接收机RF链被调谐到第二(例如,蜂窝页)信道,以允许在第二持续时间期间在接收机RF链上的第二(例如,蜂窝页)信道上接收第二(例如,蜂窝页)信号, 按照第一次持续时间。 在第一持续时间和第二持续时间期间处理第一(例如,GPS)信号,而在第二持续时间期间没有第一(例如,GPS)信号的明显中断。 例如,该处理将实际中断视为在第二持续时间期间第一(例如,GPS)信号的临时短期褪色,或提供桥接信号(例如,接收机RF链上的估计的GPS信号或 在另一个接收机RF链上接收的实际GPS信号)。
    • 10. 发明申请
    • METHOD AND APPARATUS FOR OPTIMIZING GPS-BASED POSITION LOCATION IN PRESENCE OF TIME VARYING FREQUENCY ERROR
    • 用于优化基于时间变化频率误差的基于GPS的位置位置的方法和装置
    • WO2004038447A1
    • 2004-05-06
    • PCT/US2003/033662
    • 2003-10-22
    • QUALCOMM, INCORPORATED
    • SIMIC, EmilijaPATRICK, ChristopherROWITCH, Douglas, Neal
    • G01S1/02
    • G01S19/235
    • Position determination accuracy of a wireless communication device may be negatively affected by a large unaccounted GPS doppler bias, which in turn may affect GPS doppler estimations and GPS doppler measurements conducted by the wireless communication device. The quality of GPS doppler measurements is very important for position location, because poor quality GPS doppler measurements may prevent the wireless communication device from acquiring satellites in the most sensitive modes with narrow frequency ranges, which results in reduced GPS pseudorange measurement yield. Large unaccounted GPS doppler bias also adversely affects position accuracy because of the adverse effect on the GPS code phase measurements time propagation to common time prior to their use in position location calculation. The same is true in the case of unaccounted CDMA code doppler, through the adverse effect on the AFLT code phase measurements time propagation to common time prior to their use in a position location engine. This effect is the biggest concern in the case of large search windows. Therefore, the present disclosure provides a method of optimizing GPS based position location in the presence of time-varying frequency error, including the steps of continuously measuring and/or calculating resulting GPS doppler bias and CDMA code doppler bias and then minimizing their adverse effects with regard to position location determination by re-centering GPS doppler search windows based on the GPS doppler bias value, as well as using GPS doppler bias and CDMA code doppler bias value to properly propagate GPS pseudorange and AFLT pilot phase measurements, respectively, to common time prior to their use in a position location engine.
    • 无线通信设备的位置确定精度可能受到大量未计数的GPS多普勒偏倚的负面影响,这又可能影响由无线通信设备进行的GPS多普勒估计和GPS多普勒测量。 GPS多普勒测量的质量对于位置定位是非常重要的,因为差的质量GPS多普勒测量可能会阻止无线通信设备采集具有较窄频率范围的最敏感模式的卫星,这导致GPS伪距测量的产量降低。 由于对GPS码相位测量时间的传播对其在位置位置计算中使用之前的公共时间的不利影响,大量未计数的GPS多普勒偏置也会对位置精度产生不利影响。 在没有计算的CDMA码多普勒的情况下也是如此,通过对在AFLT码相位测量时间传播到在位置定位引擎中使用之前的公共时间的不利影响。 这种效果是大型搜索窗口最大的问题。 因此,本公开提供了一种在存在时变频率误差的情况下优化基于GPS的位置定位的方法,包括以下步骤:连续测量和/或计算所得到的GPS多普勒偏差和CDMA码多普勒偏差,然后将其不利影响最小化 考虑到基于GPS多普勒偏置值重新定位GPS多普勒搜索窗口的位置定位,以及使用GPS多普勒偏差和CDMA码多普勒偏置值分别适当地将GPS伪距和AFLT导频相位测量传播到常见时间 在使用位置引擎之前。