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1.发明授权Method and a system for locating ground equipment transmitting via satellites 失效用于定位通过卫星传输的地面设备的方法和系统
公开(公告)号：US5859610A
公开(公告)日：1999-01-12
申请号：US948485
申请日：1997-10-10
摘要： A method and a system for locating ground equipment transmitting signals to a geostationary satellite, the method and the system being based on identifying the arrival directions of such signals within the coverage zone of the satellite. In the method, the arrival directions of the signals are identified by using a beam-forming active-module array antenna system on board the satellite, the system being controlled to define simultaneous beams in the radiation pattern of the antenna, the beams being superposed on one another with small offsets, the superposed beams corresponding to a limited analysis zone being illuminated within the coverage zone of the satellite, the system further being associated with a digital processing program which identifies the arrival directions of the signals which are received in the analysis zone.
摘要翻译： 一种用于定位将地面设备传输到对地静止卫星的方法和系统，所述方法和系统基于识别卫星覆盖区域内的这些信号的到达方向。 在该方法中，通过使用卫星上的波束形成有源模块阵列天线系统来识别信号的到达方向，该系统被控制以在天线的辐射图中定义同时的波束，波束叠加在 彼此具有小的偏移，对应于在卫星的覆盖区域内的有限分析区域的叠加的波束，系统还与识别在分析区域中接收的信号的到达方向的数字处理程序相关联 。
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2.发明授权Method and system for enhancing channel capacity in a point to multipoint radio communications system having different kinds of terminals 失效具有不同种类终端的点对多点无线通信系统中的信道容量增强方法和系统公开(公告)号：US07031283B2
公开(公告)日：2006-04-18
申请号：US09950771
申请日：2001-09-13
IPC分类号： H04B7/216
CPC分类号： H04L1/0022 , H04L1/0009
摘要： Method and system for enhancing channel capacity in a Point-to Multipoint radio communications system that includes terminal stations (12) of different kinds, such as residential terminals and business terminals, with different link budget requirements i.e. different signal-to-noise ratio. The method is characterized by the selective use of different channel coding codes such as forward error correction (FEC) codes, in the different concurrent channels, depending on a pre-defined category of an addressed subscriber. The multiplexing method used may be CDMA (Code Division Multiple Access) and TDMA (Time Division Multiple Access). Each terminal station (12) is in turn equipped only with an appropriate decoder, depending on its kind, e.g. residential or business.
摘要翻译： 一种点对多点无线电通信系统中的增强信道容量的方法和系统，其包括具有不同链路预算要求即不同信噪比的不同种类的终端站（12），诸如住宅终端和业务终端。 该方法的特征在于，根据寻址订户的预定义类别，在不同的并发信道中选择性地使用诸如前向纠错（FEC）码之类的不同信道编码码。 所使用的复用方法可以是CDMA（码分多址）和TDMA（时分多址）。 每个终端站（12）又依照其种类例如仅适用于适当的解码器。 住宅或商业。
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3.发明授权Method of digitally evaluating the frequency and the phase of signals, and a device for implementing such a method 失效对信号的频率和相位进行数字评估的方法，以及用于实现这种方法的装置
公开(公告)号：US4954961A
公开(公告)日：1990-09-04
申请号：US197251
申请日：1988-05-23
摘要： A method of digitally evaluating the frequency and the phase of signals in the form of digitized samples, the method being wherein it comprises in succession:a stage during which numbers corresponding to the samples of the signal to be analyzed are processed in order to convert them into the form of an analytic signal whose real portion coincides with said signal to be analyzed; and, in parallel therewith:a stage of estimating the parameters to be analyzed which is performed in an overall manner on the basis of estimators and of selection criteria by working on the phase of the signal without using any operator of the Fourier transform type or any hypothesis test either separately or simultaneously; anda stage of estimating the differences between the real signal as taken in this way and the signal obtained from the estimated parameters, thereby making it possible to deliver data in digital form relating to the quality of the analyzed signal and to the reliability of the estimated values. The invention is applicable, in particular, to microwaves.
摘要翻译： 以数字化样本的形式对信号的频率和相位进行数字评估的方法，其方法是连续地包括：处理与待分析信号的样本相对应的数字的阶段，以便对它们进行转换 成为分析信号的形式，其实际部分与要分析的信号一致; 并且与此并行：在不使用傅立叶变换类型的任何算子或者任意的任何运算符的情况下，通过对信号的相位进行工作来估计基于估计器和选择标准以总体方式进行分析的参数的阶段 假设检验单独或同时进行; 以及估计以这种方式获得的实际信号与从估计参数获得的信号之间的差异的阶段，从而使得可以以与分析的信号的质量相关的数字形式传送数据以及估计的信号的可靠性 价值观。 本发明特别适用于微波。
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4.发明授权Method of digitally evaluating the frequency and the phase of signals, and a device for implementing such a method 失效对信号的频率和相位进行数字评估的方法，以及用于实现这种方法的装置
公开(公告)号：US4979215A
公开(公告)日：1990-12-18
申请号：US529999
申请日：1990-05-29
摘要： A method of digitally evaluating the frequency and the phase of signals in the form of digitized samples, the method being wherein it comprises in succession:a stage during which numbers corresponding to the samples of the signals to be analyzed are processed in order to convert them into the form of an analytic signal whose real portion coincides with said signal to be analyzed; and, in parallel therewith:a stage of estimating the parameters to be analyzed which is performed in an overall manner on the basis of estimators and of selection criteria by working on the phase of the signal without using any operator of the Fourrier transform type of any hypothesis test either separately or simultaneously; anda stage of estimating the differences between the real signal as taken in this way and the signal obtained from the estimated parameters, thereby making it possible to deliver data in digital form relating to the quality of the analyzed signal and to the reliability of the estimated values. The invention is applicable, in particular, to microwaves.
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5.发明授权Method of demodulating digitally modulated signals, and apparatus implementing such a method 失效解调数字调制信号的方法，以及实现这种方法的装置
公开(公告)号：US4885756A
公开(公告)日：1989-12-05
申请号：US197196
申请日：1988-05-23
IPC分类号： H04L27/233
CPC分类号： H04L27/2338
摘要： A signal may be demodulated without using any analog components by using a digital processor. A digitizer delivers the amplitude of the signal to be demodulated at a sampling rate. The signal is acquired from the digitizer and stored in a common memory. The amplitude samples are converted to phase samples. Symbol rate phase hypotheses are generated for splitting the time signal into slices. The carrier phase for one symbol is then calculated for each symbol rate phase hypothesis so that the carrier phase can be estimated over a plurality of (S) symbols. The symbol phase is compared to the carrier phase so that the demodulated signal may be extracted and so that the quality of the demodulation may be estimated.
摘要翻译： 可以通过使用数字处理器而不使用任何模拟组件来解调信号。 数字转换器以采样速率传送要解调的信号的幅度。 信号从数字化仪获取并存储在公共存储器中。 振幅采样被转换为相位采样。 生成符号速率相位假设，以将时间信号分割成切片。 然后针对每个符号速率相位假设计算一个符号的载波相位，以便可以在多个（S）符号上估计载波相位。 将符号相位与载波相位进行比较，从而可以提取解调信号，从而可以估计解调的质量。
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