公开(公告)号：US5295180A

公开(公告)日：1994-03-15

申请号：US865090

申请日：1992-04-08

申请人： Dino J. Vendetti ,  Don H. Atherly ,  Ching Chuang ,  Elliott H. Drucker ,  Michael J. Dunn ,  Ronald E. Foerster ,  David G. Schoenmaker

发明人： Dino J. Vendetti ,  Don H. Atherly ,  Ching Chuang ,  Elliott H. Drucker ,  Michael J. Dunn ,  Ronald E. Foerster ,  David G. Schoenmaker

IPC分类号： G01S5/10 ,  G01S5/14 ,  G01S19/13 ,  G01S19/48 ,  H04W4/24 ,  H04W8/00 ,  H04W60/00 ,  H04W64/00 ,  H04M11/00 ,  H04Q7/00

CPC分类号： H04W4/24 ,  G01S5/10 ,  G01S5/14 ,  H04M15/8033 ,  H04W60/00 ,  H04M2215/32 ,  H04M2215/7435 ,  H04W64/00 ,  H04W8/005

摘要： A system for marking a plurality of zones within a cellular service area. One or more marker transmitters are disposed throughout a cellular area to transmit a zone identification signal that is independent of normal RF cellular coverage to a mobile or portable cellular receiver. Each zone identification signal is transmitted in a radio frequency coverage area that illuminates the zone to be identified and is constrained by a similar transmitter jamming the zone signal. The marker transmitters are programmed to transmit the zone identification signal during a predefined time slot so that more than one marker transmitter may simultaneously transmit the zone identification signal, thereby increasing the area in which the zone identification signal can be received by the mobile unit. In order to reduce the area in which a zone identification signal may be received by a mobile unit, the marker transmitters may transmit a jamming signal at the same time as the zone identification signal is transmitted.

摘要翻译： 一种用于标记蜂窝服务区域内的多个区域的系统。 一个或多个标记发射器被布置在整个蜂窝区域中，以将独立于正常RF蜂窝覆盖的区域标识信号传输到移动或便携式蜂窝接收器。 每个区域识别信号在照射要识别的区域的射频覆盖区域中传输，并且被类似的发射机阻挡该区域信号。 标记发射机被编程为在预定义的时隙期间发送区域识别信号，使得多于一个的标识发射机可以同时发送区域标识信号，从而增加移动单元可以接收区域识别信号的区域。 为了减少移动单元可以接收到区域识别信号的区域，标记发射机可以在发送区域识别信号的同时发送干扰信号。

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。