公开(公告)号：US07304911B2

公开(公告)日：2007-12-04

申请号：US10528100

申请日：2003-09-17

Applicant: Jonathan James Davies ,  Shaun Michael Dunn ,  Peter James Rapson ,  Stephen Arthur Pointer

Inventor： Jonathan James Davies ,  Shaun Michael Dunn ,  Peter James Rapson ,  Stephen Arthur Pointer

IPC: G01S3/802

CPC classification number: G01S3/8083 ,  G01S3/801 ,  G01S15/74

Abstract: Measuring apparatus for providing information on the relative location of a target site which is radiating a target signal that includes a predetermined pulse signal, comprises receiver means for providing a pair of temporally spaced output pulses in response to a single received said predetermined pulse signal and cross-correlation means coupled to said receiver means for cross-correlating said pair of output pulses or signals derived therefrom.

Abstract translation: 用于提供关于正在辐射包括预定脉冲信号的目标信号的目标位置的相对位置的信息的测量装置包括接收机装置，用于响应于单个接收到的所述预定脉冲信号并交叉地提供一对时间间隔的输出脉冲 - 相关装置，其耦合到所述接收机装置，用于将所述一对输出脉冲或从其导出的信号互相关。

公开(公告)号：US07006407B2

公开(公告)日：2006-02-28

申请号：US10473754

申请日：2002-03-28

Applicant: Jonathan James Davies ,  Shaun Michael Dunn ,  Stephen Arthur Pointer ,  Samuel William Downer

Inventor： Jonathan James Davies ,  Shaun Michael Dunn ,  Stephen Arthur Pointer ,  Samuel William Downer

IPC: H04B11/00 ,  H04B13/02

CPC classification number: H04B11/00 ,  H04B13/02 ,  H04J13/0029 ,  H04J13/12 ,  H04L1/0057 ,  H04L27/103

Abstract: For digital underwater transmission an information sequence (17) of digital bits is partitioned into a succession of symbols each comprising n bits where n is equal to or greater than one (2n potential symbols), each symbol (19) is replaced (20) a corresponding base code sequence of length m bits and the result (21) is passed to an acoustic transducer after bi-phase modulation (22) on a carrier. The code has good correlation properties, e.g. a pseudo-random maixmal length sequence, a Gold code or a Kasami code, and the value of m/n is at least (32). Preferably the base sequence is cyclically extended at one or both ends prior to modulation, and Solomon Reed redundancy coding (18) is initially applied to the information sequence. The output (23) of modulator (22) may be prefaced (26) by a pair of chirp waveforms (24). Provision is made for Doppler and multi-path correction.

Abstract translation: 对于数字水下传输，数字比特的信息序列（17）被划分成一系列符号，每个符号包括n个等于或大于一个（2个电位符号）的n个比特，每个符号（ 19）被替换（20）长度为m比特的对应的基本码序列，并且结果（21）在载波上的双相位调制（22）之后传递给声学换能器。 代码具有良好的相关性，例如 伪随机maixmal长度序列，Gold码或Kasami码，m / n值至少为（32）。 优选地，基本序列在调制之前在一端或两端循环地延伸，并且所罗门·里德冗余编码（18）最初被应用于信息序列。 调制器（22）的输出（23）可以由一对啁啾波形（24）开始（26）。 提供多普勒和多径校正。

公开(公告)号：US06980487B2

公开(公告)日：2005-12-27

申请号：US10473274

申请日：2002-03-28

Applicant: Jonathan James Davies ,  Shaun Michael Dunn ,  Stephen Arthur Pointer ,  Samuel William Downer

Inventor： Jonathan James Davies ,  Shaun Michael Dunn ,  Stephen Arthur Pointer ,  Samuel William Downer

IPC: H04B1/707 ,  H04B11/00 ,  H04B13/02 ,  H04L1/00 ,  H04L27/10

CPC classification number: H04B11/00 ,  H04B13/02 ,  H04L1/004 ,  H04L27/103

Abstract: In a digital acoustic transmission device in which a digital sequence (31) is electrically modulated (22) on a carrier cos ωt, the modulated carrier (23) is prefaced with at least two pulse signals (24) of known timing relative to each other and to the modulated digital sequence to provide an output signal (13) for acoustic transmission. The pulse signals indicate to receiver the start of a transmission, and contain Doppler information for resampling the modulated signal prior to demodulation. Where the information sequence is in encoded blocks of equal length, the relationship between successive blocks can be used to update the Doppler information for use with the following block. Channel information can also be derived from the pulse signals and/or blocks for raking the next part of the incoming signal. Preferably the pulse signals have good correlation characteristics. In the embodiments the pulse signals are an immediately successive identical pair of linearly rising chirps.

Abstract translation: 在其中数字序列（31）在载波cosω上进行电调制（22）的数字声传输装置中，调制载波（23）以相对于彼此的已知定时的至少两个脉冲信号（24）为前置 和调制数字序列，以提供用于声学传输的输出信号（13）。 脉冲信号向接收机指示发射的开始，并且包含用于在解调之前重新采样调制信号的多普勒信息。 在信息序列处于相等长度的编码块中的情况下，可以使用连续块之间的关系来更新用于随后的块的多普勒信息。 信道信息也可以从脉冲信号和/或块导出，用于耙下输入信号的下一部分。 优选地，脉冲信号具有良好的相关特性。 在实施例中，脉冲信号是立即连续的相同的线性上升线性调频对。

公开(公告)号：US07033143B2

公开(公告)日：2006-04-25

申请号：US10476822

申请日：2002-05-13

Applicant: Colin Andrew Mead ,  Alan Thomas Parsons ,  Stephen Arthur Pointer ,  Mark Arwyn Bennett

Inventor： Colin Andrew Mead ,  Alan Thomas Parsons ,  Stephen Arthur Pointer ,  Mark Arwyn Bennett

IPC: F04B49/00 ,  F04B1/26

CPC classification number: F04B49/24 ,  F04B23/021 ,  F04B35/00 ,  F04B49/20 ,  F04B2201/124 ,  F04B2201/1241 ,  F04B2203/0209

Abstract: This invention relates to a pumping system. The design of the system is such that bi-directional operation can be achieved using a significantly smaller and hence lighter unit than those currently available. It uses the direction of rotation of the drive shaft to control the opening and closure of the by-pass means for controllably returning the fluid to the first reservoir.

Abstract translation: 本发明涉及一种泵送系统。 该系统的设计使得可以使用比当前可用的更小且更轻的单元实现双向操作。 它使用驱动轴的旋转方向来控制旁通装置的打开和关闭，以可控制地将流体返回到第一储存器。