公开(公告)号：US5784339A

公开(公告)日：1998-07-21

申请号：US842602

申请日：1997-04-16

申请人： Harvey C. Woodsum ,  William Hogan

发明人： Harvey C. Woodsum ,  William Hogan

IPC分类号： H04B11/00 ,  H04B13/02

CPC分类号： H04B13/02 ,  H04B11/00

摘要： A communication and position determining device for use in an underwater communication and position determining system wherein the device transmits a sequence of one or more data words, wherein each data word includes a plurality of data bits transmitted in parallel as a corresponding number of concurrently transmitted signals, each of which occupies a different frequency band. The signals have waveforms selected from a pair of fade resistant waveforms that can be discriminated from one another, to represent binary data and the frequency bands are separated from one another by guard bands having widths sufficient to prevent intersymbol interference between the signals representing the data bits of a data word due, for example, to doppler and phase/frequency shifting, and successive data words are separated sequentially in time by intervals having a duration sufficient to prevent intersymbol interference between the signals of successive data words due to multipath reverberation. A single one of the signals of a data word is used for position determination wherein two devices each determine the bearing to one another from the bearing of the signals received from the other and a round trip propagation time determined from the time delay in transmitting an interrogation data word, a first response data word and a second response data word. Various alternative implementations of the invention are described.

摘要翻译： 一种在水下通信和位置确定系统中使用的通信和位置确定装置，其中所述设备发送一个或多个数据字的序列，其中每个数据字包括并行发送的多个数据位作为相应数量的并发发送信号 ，其中每个占据不同的频带。 这些信号具有从可以彼此区分的一对抗褪色波形中选择的波形，以表示二进制数据，并且通过具有足以防止表示数据位的信号之间的符号间干扰的保护带彼此分离频带 由于例如多普勒和相位/频移造成的数据字，并且连续数据字在时间上依次间隔地具有足以防止由于多路径混响引起的连续数据字的信号之间的符号间干扰的间隔。 数据字的信号中的单个信号用于位置确定，其中两个装置各自从从另一个接收的信号的方位确定方向，以及从发送询问的时间延迟确定的往返传播时间 数据字，第一响应数据字和第二响应数据字。 描述本发明的各种替代实现。