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1.发明授权公开(公告)号：US06549755B2
公开(公告)日：2003-04-15
申请号：US10114373
申请日：2002-04-01
IPC分类号： H04B7185
CPC分类号： H04B7/18515 , H04B7/1851 , H04W52/08 , H04W52/241
摘要： A method and apparatus for monitoring and controlling the operating point of a satellite transponder amplifier. In one aspect of the invention, a time domain signal received at a ground station is digitally sampled. Then, a histogram of the received signal is computed. To form the histogram, the digital samples are categorized according to which of a plurality of amplitude ranges each sample falls within. When plotted as a graph, the number of occurrences within each amplitude range forms the histogram. Under low compression levels, the histogram generally appears as an approximately bell-shaped curve. However, under higher compression levels, the bell-shaped curve becomes distorted. By correlating the acquired histogram to a template histogram, an amount of compression can be determined. This amount of compression indicates the operating point of the transponder amplifiers. If desired, the transmission power levels used by the satellite can be adjusted to ensure that the amplifiers operate at desired levels of compression. The invention has an advantage over prior techniques in that the operating point of the transponder amplifiers can be more accurately determined. As such, the operating point can be more precisely adjusted.
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2.发明授权Determining transmit location of an emitter using a single geostationary satellite 有权使用单个对地静止卫星确定发射器的发射位置公开(公告)号：US08462044B1
公开(公告)日：2013-06-11
申请号：US13014660
申请日：2011-01-26
摘要： The present invention provides a method and apparatus for determining the transmit location of an emitter using a single geostationary satellite. In an embodiment, a signal is received at a ground station from the emitter and relayed by the geostationary satellite. The signal is received at the ground station at a plurality of time instances and has a plurality of observed frequencies, one for each time instance. A plurality of lines of position are determining based on the plurality of observed frequencies. The transmit location of the emitter is determined based on at least one intersection among the plurality of lines of position.
摘要翻译： 本发明提供一种用于使用单个对地静止卫星确定发射器的发射位置的方法和装置。 在一个实施例中，在地面站处从发射器接收信号并由对地静止卫星中继。 该信号在多个时间点在地面站处被接收，并且具有多个观测频率，每个时间实例一个。 基于多个观察到的频率来确定多个位置行。 发射器的发射位置基于多个位置线之间的至少一个交叉点来确定。
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3.发明授权Determining a geolocation solution of an emitter on earth using satellite signals 有权使用卫星信号确定地球上发射器的地理位置解公开(公告)号：US08004459B2
公开(公告)日：2011-08-23
申请号：US12618684
申请日：2009-11-13
CPC分类号： G01S5/12 , G01S5/0273 , H04B7/18545
摘要： Embodiments provide systems and methods for determining the geolocation of an emitter on earth. A solution is obtained from two TDOA measurements that need not be acquired at the same time. A solution is obtained from a TDOA measurement and an FDOA measurement that need not be acquired at the same time and need not be coming from the same satellite pair. A location of an emitter can be determined from minimizing a cost function of the weighted combination of the six solutions derived from the two TDOA measurements and the two FDOA measurements, where the weight of each solution in the combination is determined based on the intersection angle of the two curves that define the possible locations of the emitter based on the TDOA and/or FDOA measurements.
摘要翻译： 实施例提供用于确定地球上发射器的地理位置的系统和方法。 从不需要同时获取的两个TDOA测量获得解决方案。 从TDOA测量和FDOA测量获得的解决方案不需要同时获取，并且不需要来自相同的卫星对。 发射器的位置可以从最小化从两个TDOA测量和两个FDOA测量得到的六个解的加权组合的成本函数来确定，其中组合中的每个解的权重基于 这两条曲线定义了基于TDOA和/或FDOA测量的发射器的可能位置。
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4.发明申请System for and method of removing unwanted inband signals from a received communication signal 有权从接收的通信信号中去除不需要的带内信号的系统和方法公开(公告)号：US20110135043A1
公开(公告)日：2011-06-09
申请号：US12753644
申请日：2010-04-02
申请人： Michael L. Downey , Jeffrey C. Chu
发明人： Michael L. Downey , Jeffrey C. Chu
IPC分类号： H04B1/10
CPC分类号： H04J11/004 , H04B1/10 , H04L25/03057 , H04L2025/03636
摘要： A system for and method of removing one or more unwanted inband signals from a received communications signal is described. The inband signal or signals may comprise noise, interference signals, or any other unwanted signals that impact the quality of the underlying communications. A receiver receives a communication signal, the received communication signal including the desired communication signal and one or more inband signals. A signal processor processes the received signal to form an estimate of the desired communication signal and an estimate of the inband signals. The estimate of the inband signals is thereby removed from the received signal. The estimate of the desired communication signal and the estimate of the inband signals are formed without prior knowledge of characteristics of the inband signals and without obtaining a copy of any of the inband signals from any source other than the received signal.
摘要翻译： 描述了从接收到的通信信号中去除一个或多个不需要的带内信号的系统和方法。 带内信号或信号可能包含影响底层通信质量的噪声，干扰信号或任何其他不需要的信号。 接收器接收通信信号，所接收的通信信号包括所需的通信信号和一个或多个带内信号。 信号处理器处理所接收的信号以形成期望通信信号的估计和带内信号的估计。 因此，从接收到的信号中去除了带内信号的估计。 期望的通信信号的估计和带内信号的估计是在没有先前了解带内信号的特征的情况下形成的，并且不从除了接收信号之外的任何源获得任何带内信号的副本。
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5.发明申请Determining a Geolocation Solution of an Emitter on Earth Based on Weighted Least-Squares Estimation 有权基于加权最小二乘估计确定地球上发射体的地理位置解决方案公开(公告)号：US20080252525A1
公开(公告)日：2008-10-16
申请号：US11735158
申请日：2007-04-13
IPC分类号： G01S1/24
CPC分类号： G01S5/0257 , G01S5/12
摘要： Embodiments provide systems and methods for determining the geolocation of an emitter on earth based on weighted least-squares estimation based on two TDOA and two FDOA measurements, none of which need to be acquired at the same time. The four TDOA and FDOA measurements and the errors in each of the measurements are determined. Weights for the errors in the TDOA and FDOA measurements are determined, and the weights are applied in a weighted errors function. The weights account for the errors in the measurements and the errors in the satellite positions and velocities, and are dependent on the localization geometry. The weighted errors function is minimized to determine the location estimate of the unknown emitter.
摘要翻译： 实施例提供了基于基于两个TDOA和两个FDOA测量的加权最小二乘估计来确定地球上发射器的地理位置的系统和方法，这些都不需要同时获取。 确定四个TDOA和FDOA测量以及每个测量中的误差。 确定TDOA和FDOA测量中的误差的权重，并且权重应用于加权误差函数。 重量占测量中的误差和卫星位置和速度的误差，并且取决于定位几何。 加权误差函数被最小化以确定未知发射器的位置估计。
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公开(公告)号：US07120392B2
公开(公告)日：2006-10-10
申请号：US10684147
申请日：2003-10-09
申请人： Jeffrey C. Chu , Michael L. Downey
发明人： Jeffrey C. Chu , Michael L. Downey
CPC分类号： H04W52/221 , H04W52/08 , H04W52/146 , H04W52/225 , H04W52/228
摘要： A method for providing power control to a uplink signal, comprising an uplink station transmitting an uplink signal to a satellite. The satellite also transmits a loopback signal representing the received uplink signal back to the uplink station. The satellite also transmits a beacon signal to the uplink station. The uplink station adjusts the power of the uplink signal based on measurements of the beacon signal and the uplink signal.
摘要翻译： 一种用于向上行链路信号提供功率控制的方法，包括向卫星发送上行链路信号的上行链路站。 卫星还将表示所接收的上行链路信号的环回信号发送回上行站。 卫星还向上行链路站发送信标信号。 上行站基于信标信号和上行链路信号的测量来调整上行链路信号的功率。
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公开(公告)号：US08576962B1
公开(公告)日：2013-11-05
申请号：US12776073
申请日：2010-05-07
申请人： Michael L. Downey , Jeffrey C. Chu
发明人： Michael L. Downey , Jeffrey C. Chu
IPC分类号： H03D1/00
CPC分类号： H04B7/002 , H04B7/10 , H04B17/21 , H04B17/336 , H04B17/345
摘要： A method of and system for determining cross-polarization isolation is described. In one embodiment, a modulated signal is obtained from a communication link. The modulated signal includes a modulated co-polarized signal component and a modulated cross-polarized signal component. Cross-polarization isolation is determined using the modulated co-polarized signal component and the modulated cross-polarized signal component. The determined cross-polarization isolation can be used to adjust an antenna.
摘要翻译： 描述了用于确定交叉极化隔离的方法和系统。 在一个实施例中，从通信链路获得调制信号。 调制信号包括调制的共极化信号分量和调制的交叉极化信号分量。 使用调制的共极化信号分量和调制的交叉极化信号分量来确定交叉极化隔离。 确定的交叉极化隔离可用于调整天线。
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8.发明授权Determining a geolocation solution of an emitter on earth using satellite signals 有权使用卫星信号确定地球上发射器的地理位置解公开(公告)号：US07667640B2
公开(公告)日：2010-02-23
申请号：US11735146
申请日：2007-04-13
IPC分类号： H04B7/185
CPC分类号： G01S5/12 , G01S5/0273 , H04B7/18545
摘要： Embodiments provide systems and methods for determining the geolocation of an emitter on earth. A solution is obtained from two TDOA measurements that need not be acquired at the same time. A solution is obtained from a TDOA measurement and an FDOA measurement that need not be acquired at the same time and need not be coming from the same satellite pair. A location of an emitter can be determined from minimizing a cost function of the weighted combination of the six solutions derived from the two TDOA measurements and the two FDOA measurements, where the weight of each solution in the combination is determined based on the intersection angle of the two curves that define the possible locations of the emitter based on the TDOA and/or FDOA measurements.
摘要翻译： 实施例提供用于确定地球上发射器的地理位置的系统和方法。 从不需要同时获取的两个TDOA测量获得解决方案。 从TDOA测量和FDOA测量获得的解决方案不需要同时获取，并且不需要来自相同的卫星对。 发射器的位置可以从最小化从两个TDOA测量和两个FDOA测量得到的六个解的加权组合的成本函数来确定，其中组合中的每个解的权重基于 这两条曲线定义了基于TDOA和/或FDOA测量的发射器的可能位置。
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公开(公告)号：US07466767B2
公开(公告)日：2008-12-16
申请号：US10940287
申请日：2004-09-13
申请人： Jeffrey C. Chu , Michael L. Downey
发明人： Jeffrey C. Chu , Michael L. Downey
IPC分类号： H03D1/24
CPC分类号： H03D7/165 , H03D2200/005
摘要： The invention is a signal processing system and method having increased bandwidth. An embodiment of the invention is a method of processing an analog input signal. The analog input signal is split into a first set of signals. The first set of signals are filtered. The first set of signals are digitized to form a second set of signals. The second set of signals are filtered to form a third set of signals. The third set of signals are combined to form a combined signal by adding the signals in the third set signals together to form a digital version of the analog input signal.
摘要翻译： 本发明是具有增加带宽的信号处理系统和方法。 本发明的实施例是一种处理模拟输入信号的方法。 模拟输入信号被分成第一组信号。 第一组信号被过滤。 第一组信号被数字化以形成第二组信号。 第二组信号被滤波以形成第三组信号。 通过将第三组信号中的信号相加在一起以形成模拟输入信号的数字版本，将第三组信号组合以形成组合信号。
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10.发明申请Determining a Geolocation Solution of an Emitter on Earth Using Satellite Signals 有权使用卫星信号确定地球上的发射器的地理位置解决方案公开(公告)号：US20080252516A1
公开(公告)日：2008-10-16
申请号：US11735146
申请日：2007-04-13
IPC分类号： H04B7/185
CPC分类号： G01S5/12 , G01S5/0273 , H04B7/18545
摘要： Embodiments provide systems and methods for determining the geolocation of an emitter on earth. A solution is obtained from two TDOA measurements that need not be acquired at the same time. A solution is obtained from a TDOA measurement and an FDOA measurement that need not be acquired at the same time and need not be coming from the same satellite pair. A location of an emitter can be determined from minimizing a cost function of the weighted combination of the six solutions derived from the two TDOA measurements and the two FDOA measurements, where the weight of each solution in the combination is determined based on the intersection angle of the two curves that define the possible locations of the emitter based on the TDOA and/or FDOA measurements.
摘要翻译： 实施例提供用于确定地球上发射器的地理位置的系统和方法。 从不需要同时获取的两个TDOA测量获得解决方案。 从TDOA测量和FDOA测量获得的解决方案不需要同时获取，并且不需要来自相同的卫星对。 发射器的位置可以从最小化从两个TDOA测量和两个FDOA测量得到的六个解的加权组合的成本函数来确定，其中组合中的每个解的权重基于 这两条曲线定义了基于TDOA和/或FDOA测量的发射器的可能位置。
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