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    • 26. 发明申请
    • SYSTEM AND METHOD FOR SELECTING RELIABLE LINKS BETWEEN NODES IN AN AD-HOC COMMUNICATION NETWORK
    • 用于选择在通信网络中的节点之间的可靠链路的系统和方法
    • WO2003090083A1
    • 2003-10-30
    • PCT/US2003/011503
    • 2003-04-15
    • MESHNETWORKS, INC.SCHMIDT, Jeffrey, C.WHITE, Eric, D.
    • SCHMIDT, Jeffrey, C.WHITE, Eric, D.
    • G06F11/00
    • H04L45/00H04L1/0026H04L1/203H04W40/12H04W40/248H04W40/30H04W84/18
    • A system and method for determining the reliability of at least one communication link between nodes in an ad-hoc communication network. The system and method perform the operations of receiving at a first node data sent by a second node over a link from the second node to the first node (1000), determining a bit error rate (BER) at which the first node received the data (1020), and identifying the link from the second node to the first node as being reliable when a value determined based on at least the BER and, more specifically, an aggregate of the BER and BERs of data received by the first node from the second node over a period of time, meets a desired condition (1030, 1060, 1070, 1080). The data sent by the second node can include routing advertisement data indicating at least one node which is a neighboring node of the second node, or can be any suitable regularly expected message.
    • 一种用于确定自组织通信网络中的节点之间的至少一个通信链路的可靠性的系统和方法。 系统和方法执行在第一节点接收由第二节点通过第二节点到第一节点(1000)的链路发送的数据的操作,确定第一节点接收数据的误码率(BER) (1020),并且当基于至少基于所述BER确定的值,并且更具体地,由所述第一节点从所述第一节点接收的数据的BER和BER的总和从所述第二节点到所述第一节点的链路识别为可靠的 第二节点在一段时间内满足期望的条件(1030,1060,1070,1080)。 由第二节点发送的数据可以包括指示作为第二节点的相邻节点的至少一个节点的路由广告数据,或者可以是任何合适的定期预期的消息。
    • 27. 发明申请
    • SYSTEM AND METHOD FOR SIGNAL TIME ALIGNMENT USING PROGRAMMABLE MATCHED FILTER COEFFICIENTS
    • 使用可编程匹配滤波器系数的信号时间对准的系统和方法
    • WO2003084080A2
    • 2003-10-09
    • PCT/US2003/009235
    • 2003-03-26
    • MESHNETWORKS, INC.RASMUSSEN, Donald, J.SCHMIDT, Jeffrey, C.
    • RASMUSSEN, Donald, J.SCHMIDT, Jeffrey, C.
    • H04B
    • H04B1/7077H04B1/70758H04B1/7093H04B1/7117
    • A method and system for time aligning a received transmitted signal with the receiver clock signal is disclosed herein. Time alignment is achieved by applying the proper matched filter coefficients to account for the time difference between received transmitted signal and the receiver clock signal. For direct sequence signals, time alignment is achieved between the spreading chips. For non-direct sequence signals, time alignment is achieved between the symbols. Time alignment is obtained by applying the proper matched filter coefficients to add or subtract propagation delay to account for the time difference between the received transmitted signal and received clock signal. The shape of the received synchronization correlation curve is used to determine the selection of the proper matched filter coefficients for fine timing correction. The matched filter coefficients are selected at synchronization and updated throughout the waveform reception. For direct sequence signals with RAKE receivers, timing alignment is easily applied to multiple RAKE taps.
    • 本文公开了一种用于将接收到的发送信号与接收机时钟信号进行时间对准的方法和系统。 通过应用适当的匹配滤波器系数来解决接收到的发送信号和接收机时钟信号之间的时间差来实现时间对准。 对于直接序列信号,在扩展芯片之间实现时间对准。 对于非直接序列信号,在符号之间实现时间对准。 通过应用适当的匹配滤波器系数来增加或减去传播延迟以解决接收到的发送信号和接收到的时钟信号之间的时间差来获得时间对准。 接收到的同步相关曲线的形状用于确定用于精细定时校正的适当的匹配滤波器系数的选择。 匹配的滤波器系数在整个波形接收期间同步选择并更新。 对于具有RAKE接收器的直接序列信号,定时对准很容易应用于多个RAKE抽头。