公开(公告)号：US5530437A

公开(公告)日：1996-06-25

申请号：US113490

申请日：1993-08-27

申请人： Steven J. Goldberg

发明人： Steven J. Goldberg

IPC分类号： H04W8/26 ,  H04W16/14 ,  H04W28/04 ,  H04W74/06 ,  H04W84/02 ,  H04Q9/00

CPC分类号： H04W8/26 ,  H04W84/025 ,  H04W16/14 ,  H04W74/06

摘要： A method and apparatus identify (822) respondents to a poll transmitted (806) in a radio communication system (100) comprising a transmitter (104) and a plurality of receivers (103, 105). A subset of a plurality of portable communication units (PCUs) (108) are each programmed (804, 806) with a bit pattern (510, 512, 514) corresponding uniquely to each PCU (108) and chosen such that when a group of at least two PCUs (108) are received simultaneously, the resultant received interference bit pattern provides a non-zero probability of correctly identifying at least a portion of the group, and a substantially zero probability of erroneously identifying a PCU (108) not in the group. The method further comprises the steps of transmitting (808) thereafter from the subset of PCUs (108) simultaneous, co-channel responses to the poll, each response comprising one of the programmed bit patterns (510, 512, 514), and determining (822) therefrom identities of received PCUs (108) by the interference bit patterns received at the plurality of receivers (103, 105).

摘要翻译： 方法和装置识别（822）在包括发射机（104）和多个接收机（103,105）的无线电通信系统（100）中发送的轮询（806）的响应者。 多个便携式通信单元（PCU）（108）的子集每个被编程（804,806），具有与每个PCU（108）唯一对应的位模式（510,512,514），并且被选择使得当一组 至少两个PCU（108）被同时接收，所得到的接收到的干扰比特模式提供了正确识别组的至少一部分的非零概率，并且基本上零概率错误地识别不在 组。 该方法还包括以下步骤：从PCU的子集（108）同时发送（808），对该轮询进行共信道响应，每个响应包括编程的位模式（510,512,514）中的一个，并且确定（ 822）通过在多个接收机（103,105）处接收的干扰比特模式，从而接收PCU（108）的身份。

公开(公告)号：US5327581A

公开(公告)日：1994-07-05

申请号：US890974

申请日：1992-05-29

申请人： Steven J. Goldberg

发明人： Steven J. Goldberg

IPC分类号： H04Q7/36 ,  H04H20/67 ,  H04J3/06 ,  H04L7/00 ,  H04L7/033 ,  H04B7/24

CPC分类号： H04H20/67 ,  H04J3/0602 ,  H04L7/0331

摘要： A simulcast system (FIG. 16) capable of synchronizing and maintaining synchronization of a plurality of base sites (1602, 1604, 1606, 1608) is coupled to a transmitter controller (226). The plurality of base sites (1602, 1604, 1606, 1608) is capable of transmitting data as radio frequency transmission at substantially the same time. A generator (1808) generates time marks (1708) at a predetermined time period (T). A data divider (1812) divides data into predetermined packets to be interposed between at least a pair of time marks. The data packets (1704) and time marks (1708) are transmitted to the plurality of base sites (1602, 1604, 1606, 1608). The plurality of base sites (1602, 1604, 1606, 1608) includes base site receivers (1603, 1605, 1607, 1607) for receiving the data packets (1704) and time marks (1708) and clocks (1611, 1613, 1615, 1617) for measuring the time (T) between each pair of time marks. Base sites controller (1612, 1614, 1616, 1618) determine when there are variations in time between any pair of time marks and the predetermined time period (T). Timers adjust the delay time at each of the plurality of base sites (1602, 1604, 1606, 1608) in response to variation in time between time marks at the corresponding base site, and delay retransmission of data from the receipt of a start command (1706) by a predetermined delay time determined for each of the plurality of base sites to enable the retransmission of data at substantially the same time by the plurality of base sites (1602, 1604, 1606, 1608).

摘要翻译： 能够同步和维持多个基站（1602,1604,1606,1608）的同步的联播系统（图16）耦合到发射机控制器（226）。 多个基站（1602,1604,1606,1608）能够在基本上同时发射数据作为射频传输。 发生器（1808）在预定时间段（T）产生时间标记（1708）。 数据分配器（1812）将数据划分成至少一对时间标记之间的预定分组。 数据分组（1704）和时间标记（1708）被发送到多个基站（1602,1604,1606,1608）。 多个基站（1602,1604,1606,1608）包括用于接收数据分组（1704）和时间标记（1708）和时钟（1611,1613,1615,1607）的基站接收器（1603,1605,1607,1607） 1617），用于测量每对时间标记之间的时间（T）。 基站控制器（1612,1614,1616,1618）确定何时在任何一对时间标记与预定时间段（T）之间存在时间变化。 定时器响应于在相应的基站点的时间标记之间的时间变化以及来自接收开始命令的数据的延迟重新调整多个基站（1602,1604,1606,1608）中的每一个的延迟时间 1706）按照为多个基站中的每一个确定的预定延迟时间，以使得能够在多个基站（1602,1604,1606,1608）基本上同时重新发送数据。