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1.发明授权Skywave adaptable network transceiver apparatus using predictive frequencies for initial link-up 失效Skywave适应性网络收发器设备使用预测频率进行初始连接
公开(公告)号：US5204856A
公开(公告)日：1993-04-20
申请号：US638956
申请日：1991-01-09
CPC分类号： H04B7/2643 , H04J4/00
摘要： In a skywave adaptable communication network, the time required to initiate communications between two transceivers can often be an important factor where the propagation characteristics of signals at various frequencies may bary drastically with time. The present invention not only improves upon known prior art by accepting the first frequency that it hears as a communication frequency when two nodes are attempting to communicate from a known list of probe frequencies to be transmitted at known times, it initially uses predictive frequencies in probe signal format during the time that would later be used for traffic information after link-up has occurred where the predictive frequencies may be based on algorithms, experience or whatever. Once link-up has occurred, the probe signals are used to allow the system to then adaptively change to better quality signals as these better quality signals are received, analyzed and compared with present working frequency signals.
摘要翻译： 在天波适应通信网络中，启动两个收发器之间通信所需的时间通常可能是一个重要因素，其中各种频率的信号的传播特性可能随时间而急剧变化。 本发明不仅通过接受在两个节点正尝试从已知时间发射的探测频率的已知列表进行通信而将其听到的第一频率作为通信频率进行改进，它最初在探测中使用预测频率 信号格式在稍后将用于在发生链路之后的交通信息的时间内，其中预测频率可以基于算法，经验或其他方式。 一旦发生连接，探头信号就被用于允许系统自适应地改变到更好的质量信号，因为这些更好的质量信号被接收，分析并与现在的工作频率信号进行比较。
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公开(公告)号：US4937822A
公开(公告)日：1990-06-26
申请号：US371906
申请日：1989-06-27
CPC分类号： H04J13/00 , H04B7/18532
摘要： An adaptive TDMA (time division multiple access) communication system is illustrated which dynamically maintains potentially different frequencies between nodes of the communication system using a process of communicating the quality of received signals between the nodes and storing this information so that an optimum frequency band can be selected whereby whenever signal quality deteriorates, an alternate frequency can be selected to provide continued communications. An embodiment of the system spans both high frequency (HF) and very high frequency (VHF) to establish the communications through atmospheric induced refractions (reflections) beyond line of sight between directly communicating nodes of the system. Further, the system uses frequency hopping both for signal transmission security and for node identification. When a node is traffic idle and also on a periodic maintenance basis, frequency bands other than the traffic frequency are analyzed for potential future use.
摘要翻译： 示出了自适应TDMA（时分多址）通信系统，其使用在节点之间传送接收信号的质量的过程来动态地维持通信系统的节点之间的潜在不同频率，并存储该信息，使得最佳频带可以 被选择，由此每当信号质量恶化时，可以选择交替频率以提供持续的通信。 系统的一个实施例跨越高频（HF）和非常高频率（VHF），以通过在系统的直接通信节点之间的视线之外的大气诱导折射（反射）来建立通信。 此外，系统使用跳频既用于信号传输安全性又用于节点识别。 当节点处于业务空闲状态并且还在周期性维护的基础上，分析除了业务频率之外的频带以用于将来的潜在用途。
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公开(公告)号：US5204855A
公开(公告)日：1993-04-20
申请号：US639487
申请日：1991-01-09
CPC分类号： H04B7/12
摘要： In a skywave adaptable communications network, the time required to initiate communications between two transceivers can often be an important factor where the propagation characteristics of signals at various frequencies vary drastically with time. The present invention improved upon the prior art by accepting the first frequency that it hears as a communication frequency when two nodes are attempting to communicate from a known list of frequencies to be transmitted at known times. The system then adaptively changes to better quality signals as these better quality signals are received, analyzed and compared with present working frequency signals.
摘要翻译： 在天波适应通信网络中，启动两个收发器之间通信所需的时间通常可能是一个重要因素，其中各种频率的信号的传播特性随时间而急剧变化。 本发明通过接受在两个节点正尝试从已知频率的已知列表进行通信时所听到的第一频率作为通信频率而改进现有技术。 然后，随着这些更好的质量信号被接收，分析和与当前工作频率信号进行比较，系统随后自适应地改变到更好的质量信号。
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