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1.发明授权Digital-to-analog converter using pseudo-random sequences and a method for using the same 失效使用伪随机序列的数模转换器及其使用方法公开(公告)号：US06617990B1
公开(公告)日：2003-09-09
申请号：US10091032
申请日：2002-03-06
IPC分类号： H03M166
摘要： A system and method for providing discrete analog voltage levels. The system and method employs a pseudo-random sequence generator for generating random-sequences of binary values, namely zeros and ones, based on a digital input. The pseudo-random sequence serves to modulate a current source whose output is integrated to develop a constant discrete analog voltage output. This method reduces spurious frequency interference on the circuit. The system and method can be employed in a node of a wireless ad-hoc communications network.
摘要翻译： 一种用于提供离散模拟电压电平的系统和方法。 该系统和方法采用伪随机序列发生器，用于基于数字输入产生二进制值的随机序列，即零和1。 伪随机序列用于调制其输出被积分的电流源，以产生恒定的离散模拟电压输出。 该方法可以减少电路上的杂散频率干扰。 该系统和方法可用于无线自组织通信网络的节点。
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2.发明授权Bandwidth efficient system and method for ranging nodes in a wireless communication network 有权无线通信网络中测距节点的带宽有效系统和方法公开(公告)号：US07382804B2
公开(公告)日：2008-06-03
申请号：US11197950
申请日：2005-08-05
IPC分类号： H04J3/06
摘要： The present invention provides a bandwidth efficient system and method of measuring the range between nodes (102, 106, 107) in a wireless communications network (100) with one-way data transfer, where each node (102, 106, 107) periodically transmits a message that contains information regarding neighboring nodes (102, 106, 107) from which any prior messages have been received by the transmitting node (102, 106, 107). A node (102, 106, 107) receives the messages transmitted from neighboring nodes (102, 106, 107) in the network (100), and records the times of arrival of the received messages. The node (102, 106, 107) receiving those messages can thus determine the respective distances between itself and the neighboring nodes (102, 106, 107) based on the respective time of arrivals of the received messages and the respective information included in the respective messages.
摘要翻译： 本发明提供了一种利用单向数据传输来测量无线通信网络（100）中的节点（102,106,107）之间的范围的带宽有效系统和方法，其中每个节点（102,106,107）周期性地发送 包含关于相邻节点（102,106,107）的信息的消息，由发射节点（102,106,107）已经接收了任何先前消息。 节点（102,106,107）接收从网络（100）中的相邻节点（102,106,107）发送的消息，并且记录所接收消息的到达时间。 因此，接收这些消息的节点（102,106,107）可以基于接收到的消息的相应到达时间和包括在相应节点（102,106,107）中的相应信息来确定其相邻节点（102,106,107）之间的相应距离 消息。
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3.发明授权Method and system for determining a minimum time of flight of a radio frequency transmission 失效确定射频传输的最小飞行时间的方法和系统公开(公告)号：US07512113B2
公开(公告)日：2009-03-31
申请号：US11314218
申请日：2005-12-21
IPC分类号： H04J3/06
CPC分类号： H04J3/0682
摘要： A method and system for determining a minimum time of flight between communication devices is useful for correcting ranging errors induced by multi-path signals. The method includes transmitting a range request message, including a first periodically repeating synchronization sequence, from the first communication device via a first RF channel to the second communication device (step 91). A range response message, including a second periodically repeating synchronization sequence and a minimum path turn around time, is then received at the first communication device via a second RF channel from the second communication device (step 92). A change in the second RF channel is induced after receipt of each synchronization sequence. A minimum path round trip time is then determined from multiple time of arrival determinations (step 93). Finally, the minimum time of flight is calculated from the minimum path round trip time and the minimum path turn around time (step 94).
摘要翻译： 用于确定通信设备之间的最小飞行时间的方法和系统对于校正由多径信号引起的测距误差是有用的。 该方法包括从第一通信设备经由第一RF信道向第二通信设备发送包括第一周期性重复同步序列的范围请求消息（步骤91）。 然后，经由第二通信设备的第二RF信道在第一通信设备处接收包括第二周期性重复同步序列和最小路径转向时间的范围响应消息（步骤92）。 在接收到每个同步序列之后，引起第二RF信道的改变。 然后从多个到达时间确定确定最小路径往返时间（步骤93）。 最后，从最小路径往返时间和最小路径转向时间计算最小飞行时间（步骤94）。
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4.发明申请Bandwidth efficient system and method for ranging nodes in a wireless communication network 有权无线通信网络中测距节点的带宽有效系统和方法公开(公告)号：US20060029009A1
公开(公告)日：2006-02-09
申请号：US11197950
申请日：2005-08-05
IPC分类号： H04B7/00
摘要： The present invention provides a bandwidth efficient system and method of measuring the range between nodes (102, 106, 107) in a wireless communications network (100) with one-way data transfer, where each node (102, 106, 107) periodically transmits a message that contains information regarding neighboring nodes (102, 106, 107) from which any prior messages have been received by the transmitting node (102, 106, 107). A node (102, 106, 107) receives the messages transmitted from neighboring nodes (102, 106, 107) in the network (100), and records the times of arrival of the received messages. The node (102, 106, 107) receiving those messages can thus determine the respective distances between itself and the neighboring nodes (102, 106, 107) based on the respective time of arrivals of the received messages and the respective information included in the respective messages.
摘要翻译： 本发明提供了一种利用单向数据传输来测量无线通信网络（100）中的节点（102,106,107）之间的范围的带宽有效系统和方法，其中每个节点（102,106,107）周期性地发送 包含关于相邻节点（102,106,107）的信息的消息，由发射节点（102,106,107）已经接收了任何先前消息。 节点（102,106,107）接收从网络（100）中的相邻节点（102,106,107）发送的消息，并且记录所接收消息的到达时间。 因此，接收这些消息的节点（102,106,107）可以基于接收到的消息的相应到达时间和包括在相应节点（102,106,107）中的相应信息来确定其相邻节点（102,106,107）之间的相应距离 消息。
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