公开(公告)号：US20230353256A1

公开(公告)日：2023-11-02

申请号：US18297317

申请日：2023-04-07

申请人： CSignum Ltd.

发明人： Mark Rhodes ,  Derek Wolfe ,  Brendan Peter Hyland

IPC分类号： H04B13/02

CPC分类号： H04B13/02 ,  Y10S367/901 ,  Y10S367/91 ,  Y10S367/904

摘要： An underwater communications system is provided that transmits electromagnetic and/or magnetic signals to a remote receiver. The transmitter includes a data input. A digital data compressor compresses data to be transmitted. A modulator modulates compressed data onto a carrier signal. An electrically insulated, magnetic coupled antenna transmits the compressed, modulated signals. The receiver that has an electrically insulated, magnetic coupled antenna for receiving a compressed, modulated signal. A demodulator is provided for demodulating the signal to reveal compressed data. A de-compressor de-compresses the data. An appropriate human interface is provided to present transmitted data into text/audio/visible form. Similarly, the transmit system comprises appropriate audio/visual/text entry mechanisms.

公开(公告)号：US08364078B2

公开(公告)日：2013-01-29

申请号：US13210996

申请日：2011-08-16

申请人： Mark Rhodes ,  Derek Wolfe ,  Brendan Hyland

发明人： Mark Rhodes ,  Derek Wolfe ,  Brendan Hyland

IPC分类号： H04B13/02

CPC分类号： H04B13/02 ,  Y10S367/901 ,  Y10S367/904 ,  Y10S367/91

摘要： An underwater communications system is provided that transmits electromagnetic and/or magnetic signals to a remote receiver. The transmitter includes a data input. A digital data compressor compresses data to be transmitted. A modulator modulates compressed data onto a carrier signal. An electrically insulated, magnetic coupled antenna transmits the compressed, modulated signals. The receiver that has an electrically insulated, magnetic coupled antenna for receiving a compressed, modulated signal. A demodulator is provided for demodulating the signal to reveal compressed data. A de-compressor de-compresses the data. An appropriate human interface is provided to present transmitted data into text/audio/visible form. Similarly, the transmit system comprises appropriate audio/visual/text entry mechanisms.

摘要翻译： 提供一种将电磁和/或磁信号传输到远程接收器的水下通信系统。 发射机包括数据输入。 数字数据压缩器压缩要发送的数据。 调制器将压缩数据调制到载波信号上。 电绝缘的磁耦合天线传输压缩的调制信号。 具有用于接收压缩的调制信号的电绝缘磁耦合天线的接收器。 提供解调器用于解调信号以显示压缩数据。 解压缩器解压缩数据。 提供适当的人机界面以将传输的数据呈现为文本/音频/可视形式。 类似地，发射系统包括适当的音频/视频/文本输入机制。

公开(公告)号：US08358973B2

公开(公告)日：2013-01-22

申请号：US13211039

申请日：2011-08-16

申请人： Mark Rhodes ,  Derek Wolfe ,  Brendan Hyland

发明人： Mark Rhodes ,  Derek Wolfe ,  Brendan Hyland

IPC分类号： H04B13/02

CPC分类号： H04B13/02 ,  Y10S367/901 ,  Y10S367/904 ,  Y10S367/91

摘要： An underwater communications system is provided that transmits electromagnetic and/or magnetic signals to a remote receiver. The transmitter includes a data input. A digital data compressor compresses data to be transmitted. A modulator modulates compressed data onto a carrier signal. An electrically insulated, magnetic coupled antenna transmits the compressed, modulated signals. The receiver that has an electrically insulated, magnetic coupled antenna for receiving a compressed, modulated signal. A demodulator is provided for demodulating the signal to reveal compressed data. A de-compressor de-compresses the data. An appropriate human interface is provided to present transmitted data into text/audio/visible form. Similarly, the transmit system comprises appropriate audio/visual/text entry mechanisms.

公开(公告)号：US20110300797A1

公开(公告)日：2011-12-08

申请号：US13211039

申请日：2011-08-16

申请人： Mark Rhodes ,  Derek Wolfe ,  Brendan Hyland

发明人： Mark Rhodes ,  Derek Wolfe ,  Brendan Hyland

IPC分类号： H04B13/02

CPC分类号： H04B13/02 ,  Y10S367/901 ,  Y10S367/904 ,  Y10S367/91

摘要： An underwater communications system is provided that transmits electromagnetic and/or magnetic signals to a remote receiver. The transmitter includes a data input. A digital data compressor compresses data to be transmitted. A modulator modulates compressed data onto a carrier signal. An electrically insulated, magnetic coupled antenna transmits the compressed, modulated signals. The receiver that has an electrically insulated, magnetic coupled antenna for receiving a compressed, modulated signal. A demodulator is provided for demodulating the signal to reveal compressed data. A de-compressor de-compresses the data. An appropriate human interface is provided to present transmitted data into text/audio/visible form. Similarly, the transmit system comprises appropriate audio/visual/text entry mechanisms.

公开(公告)号：US20110300794A1

公开(公告)日：2011-12-08

申请号：US13210947

申请日：2011-08-16

申请人： Mark Rhodes ,  Derek Wolfe ,  Brendan Hyland

发明人： Mark Rhodes ,  Derek Wolfe ,  Brendan Hyland

IPC分类号： H04B13/02

CPC分类号： H04B13/02 ,  Y10S367/901 ,  Y10S367/904 ,  Y10S367/91

摘要： An underwater communications system is provided that transmits electromagnetic and/or magnetic signals to a remote receiver. The transmitter includes a data input. A digital data compressor compresses data to be transmitted. A modulator modulates compressed data onto a carrier signal. An electrically insulated, magnetic coupled antenna transmits the compressed, modulated signals. The receiver that has an electrically insulated, magnetic coupled antenna for receiving a compressed, modulated signal. A demodulator is provided for demodulating the signal to reveal compressed data. A de-compressor de-compresses the data. An appropriate human interface is provided to present transmitted data into text/audio/visible form. Similarly, the transmit system comprises appropriate audio/visual/text entry mechanisms.

公开(公告)号：US20100159827A1

公开(公告)日：2010-06-24

申请号：US12569392

申请日：2009-09-29

申请人： Mark Rhodes ,  Derek Wolfe ,  Brendan Hyland

发明人： Mark Rhodes ,  Derek Wolfe ,  Brendan Hyland

IPC分类号： H04B13/02

CPC分类号： H04B13/02 ,  Y10S367/901 ,  Y10S367/904 ,  Y10S367/91

摘要： An underwater communications system is provided that transmits electromagnetic and/or magnetic signals to a remote receiver. The transmitter includes a data input. A digital data compressor compresses data to be transmitted. A modulator modulates compressed data onto a carrier signal. An electrically insulated, magnetic coupled antenna transmits the compressed, modulated signals. The receiver that has an electrically insulated, magnetic coupled antenna for receiving a compressed, modulated signal. A demodulator is provided for demodulating the signal to reveal compressed data. A de-compressor de-compresses the data. An appropriate human interface is provided to present transmitted data into text/audio/visible form. Similarly, the transmit system comprises appropriate audio/visual/text entry mechanisms.

摘要翻译： 提供一种将电磁和/或磁信号传输到远程接收器的水下通信系统。 发射机包括数据输入。 数字数据压缩器压缩要发送的数据。 调制器将压缩数据调制到载波信号上。 电绝缘的磁耦合天线传输压缩的调制信号。 具有用于接收压缩的调制信号的电绝缘磁耦合天线的接收器。 提供解调器用于解调信号以显示压缩数据。 解压缩器解压缩数据。 提供适当的人机界面以将传输的数据呈现为文本/音频/可视形式。 类似地，发射系统包括适当的音频/视频/文本输入机制。

公开(公告)号：US06512720B1

公开(公告)日：2003-01-28

申请号：US10145618

申请日：2002-05-14

申请人： Tsih Yang

发明人： Tsih Yang

IPC分类号： H04B1100

CPC分类号： H04W56/0035 ,  H04B7/01 ,  H04B11/00 ,  Y10S367/904

摘要： A method for Doppler compensation in a phase coherent underwater communications system includes the steps of receiving a communications signal from a plurality of underwater communications channels, where the signal consists of a sequence of raw data; then applying a Doppler estimation to the data; demodulating the raw data; low pass filtering the demodulated raw data; applying resampling and downsampling to the data at a fractional sampling rate, for n samples per symbol, and generating a synchronized, Doppler-phase-corrected output signal; then applying the synchronized, Doppler-phase-corrected fractionally sampled signal to a phase locked loop and equalizer; then comparing an estimated symbol with a decision symbol and updating a plurality of tap coefficients; and h) outputting decision symbols. The Doppler estimation is performed either by applying a concurrent sinusoidal signal in a different band than the band of the communications signal, and then applying a Fourier transform or adaptive spectral estimation over a duration larger that a packet length to thereby obtain the Doppler-shift frequency fcd; or, by applying a beginning probe signal; applying an ending probe signal; applying a probe replica signal; cross-correlating the probe replica signal with the beginning probe signal and the ending probe signal using a matched filter processor; determining a difference of arrival time between the beginning and ending probe signals using the peaks of the cross-correlation outputs; taking a ratio of the difference of arrival time to a time difference of the beginning and ending probe signals to obtain a dilation/compression ratio due to the Doppler shift; and then obtaining the Doppler shift from the dilation/compression ratio.

摘要翻译： 在相位相干水下通信系统中的多普勒补偿方法包括从多个水下通信信道接收通信信号的步骤，其中该信号由一系列原始数据组成; 然后对数据应用多普勒估计; 解调原始数据; 低通滤波解调的原始数据; 对于每个符号的n个采样以分数采样率对数据应用重采样和下采样，以及生成同步的多普勒相位校正输出信号; 然后将同步的，多普勒相位校正的小数采样信号施加到锁相环和均衡器; 然后将估计符号与判定符号进行比较并更新多个抽头系数; 和h）输出判定符号。 通过在与通信信号的频带不同的频带中应用并发的正弦信号，然后在大于分组长度的持续时间上应用傅立叶变换或自适应频谱估计来执行多普勒估计，从而获得多普勒频移 fcd; 或通过应用起始探针信号; 应用结束探针信号; 应用探头复制信号; 使用匹配的滤波处理器将探头复本信号与起始探测信号和结束探测信号互相关; 使用互相关输出的峰值确定开始和结束探测信号之间的到达时间差; 获取到达时间差与开始和结束探测信号的时间差的比率，以获得由于多普勒频移引起的扩张/压缩比; 然后从扩张/压缩比获得多普勒频移。

公开(公告)号：US6072425A

公开(公告)日：2000-06-06

申请号：US251891

申请日：1999-02-19

申请人： Raymond W. Vopat

发明人： Raymond W. Vopat

IPC分类号： G01S7/40 ,  G01S13/60 ,  G01S13/88 ,  G01S15/60

CPC分类号： G01S15/60 ,  G01S13/60 ,  G01S13/882 ,  G01S7/4004 ,  Y10S367/904

摘要： A terrain bias compensator for a Doppler navigation system utilizes an auxiliary beam with each beam of the Doppler system to form Doppler beam pairs. The axis of the auxiliary beam is slightly offset from the axis of the main beam and is positioned so that the two axes are in the same vertical plane. After slant range compensation, the amplitudes of the Doppler spectrum of each beam is averaged over a predetermined time interval. The difference between the mean amplitudes of the two beams is divided by the offset angle to establish an amplitude per degree correction factor which is applied to the main beam signal returns to establish a main beam amplitude corrected Doppler spectrum.

摘要翻译： 多普勒导航系统的地形偏置补偿器利用多普勒系统的每个波束的辅助波束形成多普勒波束对。 辅助光束的轴线稍微偏离主光束的轴线并且被定位成使得两个轴线处于相同的垂直平面中。 在倾斜范围补偿之后，每个波束的多普勒频谱的幅度在预定的时间间隔内被平均化。 将两个光束的平均幅度之差除以偏移角，以建立施加到主波束信号的每度校正因子的振幅，以建立主波束幅度校正的多普勒频谱。

公开(公告)号：US5732044A

公开(公告)日：1998-03-24

申请号：US715741

申请日：1996-09-19

申请人： Susan M. Jarvis

发明人： Susan M. Jarvis

IPC分类号： H04B11/00

CPC分类号： H04B11/00 ,  Y10S367/904

摘要： A signal shift compensation system and method compensates for a shift in a ignal, such as a Doppler shift in an acoustic signal. The system includes a signal sampler for oversampling the shifted signal at a fixed oversampling rate to establish an oversampled shifted signal digital value sequence. The fixed sampling rate is greater than the typical sampling rate, such as the Nyquist rate, of the signals by an oversampling factor. The system further includes a compensation downsampler for decimating the oversampled Doppler shifted signal according to a downsampling factor to establish a decimated digital value sequence. The downsampling factor is determined according to the oversampling factor by which the signal is oversampled and an estimate of the (Doppler) shift value. In one example, the downsampling factor is equal to the oversampling factor divided by a Doppler multiplier reflecting the Doppler shift. Each sample in the decimated sequence is given the value of a corresponding sample in the oversampled sequence. Decimation according to the downsampling factor results in a decimated sequence that closely approximates the original unshifted signal.

摘要翻译： 信号移位补偿系统和方法补偿信号中的移位，例如声信号中的多普勒频移。 该系统包括信号采样器，用于以固定的过采样速率对移位的信号过采样，以建立过采样的移位信号数字值序列。 固定采样率大于典型采样率，如奈奎斯特速率，信号采用过采样因子。 该系统还包括补偿下采样器，用于根据下采样因子抽取过采样的多普勒频移信号以建立抽取的数字值序列。 根据过采样因子确定下采样因子，通过该取样因子过采样信号和（Doppler）移位值的估计。 在一个示例中，下采样因子等于过采样因子除以反映多普勒频移的多普勒乘法。 抽取序列中的每个样本都被赋予过采样序列中相应样本的值。 根据下采样因子的抽取导致与原始未移相信号近似的抽取序列。

公开(公告)号：US5519402A

公开(公告)日：1996-05-21

申请号：US396250

申请日：1995-02-28

申请人： Hitoshi Kitayoshi

发明人： Hitoshi Kitayoshi

IPC分类号： G01R23/16 ,  G01R23/163 ,  H04B1/14 ,  H04B7/15 ,  H04B7/155 ,  H04L27/144 ,  H04B7/185

CPC分类号： H04L27/144 ,  G01R23/163 ,  H04B1/14 ,  Y10S367/904

摘要： A Doppler shift compensation apparatus for compensating Doppler frequency shifts in an incoming signal to reproduce a highly accurate signal. The Doppler shift compensation apparatus has high frequency dissolution ability and can detect a frequency, an amplitude and a phase of the incoming signal accurately. The Doppler shift compensation apparatus includes an analog to digital converter which transforms an analog input signal to digital data, a memory which stores the digital data from the analog to digital converter, a window function weighting part for multiplying a specified window function to input data from the memory, a fast Fourier transformer (FFT) for transforming the input data to frequency spectrum data, an interpolation judgment part which distinguishes line spectrum from dispersed spectrum in the frequency spectrum data from the fast Fourier transformer, a spectrum interpolator which measures the true frequency, amplitude and phase of the line spectrum based on the judgement of the interpolation judgement part, an accumulator for accumulating the frequency domain data interpolated by the spectrum interpolator, a summation part for vector-summing the frequency domain data accumulated by the accumulator to a Fourier transform output of the fast Fourier transformer, a regression computation part for performing a predetermined regression computation for the frequency data from the summation part based on the output data from the interpolation judgment part, and a subtractor for subtracting the output data of said regression computation part from the frequency data from the summation part.

摘要翻译： 一种用于补偿输入信号中的多普勒频移的多普勒频移补偿装置，以再现高精度信号。 多普勒频移补偿装置具有高频率的溶解能力，可以精确地检测输入信号的频率，振幅和相位。 多普勒频移补偿装置包括将模拟输入信号变换为数字数据的模数转换器，存储来自模拟数字转换器的数字数据的存储器，用于将指定的窗函数乘以输入数据的窗口函数加权部分， 存储器，用于将输入数据变换为频谱数据的快速傅里叶变换器（FFT），将来自快速傅立叶变换器的频谱数据中的线谱与分散频谱区分开的插值判断部分，测量真实频率的频谱插值器 基于内插判断部的判断的线频谱的振幅和相位，用于累加由频谱插值器内插的频域数据的累加器，用于将由累加器累积的频域数据向量求和的求和部分， 变换输出的快速傅里叶变换器，回归 计算部分，用于根据来自内插判断部分的输出数据对来自求和部分的频率数据进行预定的回归计算;以及减法器，用于从求和部分的频率数据中减去所述回归计算部分的输出数据。