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1.发明授权Method and apparatus for cancelling interference between area coverage and spot coverage antenna beams 失效用于消除区域覆盖和点覆盖天线波束之间的干扰的方法和装置
公开(公告)号：US4145658A
公开(公告)日：1979-03-20
申请号：US803151
申请日：1977-06-03
CPC分类号： H04B7/2041
摘要： The present invention relates to method and apparatus for substantially cancelling interference between signals using the same frequency spectrum which are received via overlapping area coverage and spot coverage antenna beams. At the transmitter where the overlapping area and spot coverage beams are concurrently transmitted, a predetermined portion of the area coverage signal is coupled into each of the spot beam signals which will be overlapped at the associated spot beam receiver area by the area coverage beam. The predetermined portion coupled into each spot beam signal will have a magnitude and phase to substantially cancel the area coverage signal at the associated spot beam receiver area.
摘要翻译： {PG，1]本发明涉及用于基本上消除使用相同频谱的信号之间的干扰的方法和装置，其经由重叠区域覆盖和点覆盖天线波束接收。 在重叠区域和点覆盖波束被同时传输的发射机处，区域覆盖信号的预定部分被耦合到每个点波束信号中，该波束信号将通过区域覆盖波束在相关联的射束接收器区域处重叠。 耦合到每个点波束信号中的预定部分将具有幅度和相位以基本上消除相关联的光点接收器区域处的区域覆盖信号。
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2.发明授权Method and apparatus to permit substantial cancellation of interference between a received first and second signal 失效允许基本上消除接收的第一和第二信号之间的干扰的方法和装置
公开(公告)号：US4178550A
公开(公告)日：1979-12-11
申请号：US803152
申请日：1977-06-03
IPC分类号： H04J99/00 , H01Q25/00 , H03M13/23 , H04B7/15 , H04B7/204 , H04L1/00 , H04J13/00 , H04B3/60 , H04B15/00
CPC分类号： H04L1/0059 , H01Q25/00 , H04B7/2041
摘要： The present invention relates to method and apparatus for substantially reducing the effects of interference at a receiver between concurrently received first and second digital signals which use the same frequency spectrum. Interference between signals is effectively reduced by transmitting the first digital signal in an uncoded form while concurrently transmitting the second digital signal with both reduced capacity when compared with the first signal and in coded form using a forward error correcting code such as, for example, a block or convolutional code. At the receiver intercepting both digital signals, a suitable detection process is performed to decode the second signal and separate both signals. The present invention is applicable to the simultaneous satellite transmission of an area coverage beam and a plurality of spot coverage beams or to increase capacity on a radio channel.
摘要翻译： 本发明涉及用于在同时接收的使用相同频谱的第一和第二数字信号之间大大减少接收机干扰的影响的方法和装置。 通过以未编码形式发送第一数字信号同时发送具有减小的容量的第二数字信号与第一信号相比并以编码形式使用前向纠错码（例如， 块或卷积码。 在接收器拦截两个数字信号时，执行合适的检测处理以对第二信号进行解码并分离两个信号。 本发明适用于区域覆盖波束和多个点覆盖波束的同时卫星传输，或者增加无线电信道上的容量。
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公开(公告)号：US5600706A
公开(公告)日：1997-02-04
申请号：US240070
申请日：1994-05-09
申请人： Michael J. Dunn , Don H. Atherly , Douglas O. J. Reudink , Martin J. Feuerstein , Ronald E. Foerster , Ching Chuang , Dino J. Vendetti
发明人： Michael J. Dunn , Don H. Atherly , Douglas O. J. Reudink , Martin J. Feuerstein , Ronald E. Foerster , Ching Chuang , Dino J. Vendetti
IPC分类号： G01S5/10 , G01S5/14 , G01S19/48 , H04W4/02 , H04W4/24 , H04W60/00 , H04W64/00 , H04M11/00 , G01S3/02 , H04B7/185
CPC分类号： G01S5/14 , G01S5/10 , H04M15/8033 , H04M15/8083 , H04W4/24 , H04W60/00 , H04M2215/0184 , H04M2215/32 , H04M2215/7435 , H04W4/02 , H04W64/00
摘要： A position system and method utilizes a plurality of range transceivers located at known fixed locations and which are adapted to transmit approximately synchronized digital range signals for receipt by both a primary receiver and a supplemental receiver, the former disposed at a known location and the latter disposed at an unknown location. The range transceivers are adapted to transmit pulse sequences which include an error portion corresponding to the approximate synchronization error of each range signal. This error portion is constantly updated in accordance with the last determined synchronization errors of the corresponding range signals received by a secondary transceiver. In an alternative embodiment employing Code Division Multiple Access (CDMA) technology, the range transceiver time stamp on transmitted range signals may be adjusted to account for the measured timing error for a given range transceiver. The supplemental receiver receives the range signals and uses the same in accordance with known time of arrival or time difference of arrival calculation techniques to determine the position of the supplemental receiver.
摘要翻译： 位置系统和方法利用位于已知固定位置处的多个范围收发器，并且其适于发送近似同步的数字范围信号，以便由主接收机和辅助接收机两者接收，前者设置在已知位置，后者设置在 在一个未知的位置。 范围收发器适于发送包括对应于每个范围信号的近似同步误差的误差部分的脉冲序列。 根据由次级收发器接收到的相应范围信号的最后确定的同步误差来不断更新该误差部分。 在采用码分多址（CDMA）技术的替代实施例中，传输范围信号上的范围收发器时间戳可以被调整以考虑给定范围收发器的测量定时误差。 补充接收机接收范围信号并根据已知的到达时间或到达时间差计算技术使用相同的信号来确定补充接收机的位置。
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