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公开(公告)号：US5018114A
公开(公告)日：1991-05-21
申请号：US284004
申请日：1988-12-13
摘要： An underwater acoustic communication system provides an operator with adjable frequency diversity so that data rates may be tailored to specific multipath environments. Transmitted messages are sent with precursor transmission/reception synchronization data and transmission parameter data so that the receiving communication end will recognize when message data starts, tone length as-well-as the frequency diversity of the transmitted message. Timing is extracted from the data to compensate for Doppler shift.
摘要翻译： 水下声学通信系统为操作者提供可调节的频率分集，以便数据速率可以针对特定的多径环境而定制。 发送的消息与前端发送/接收同步数据和传输参数数据一起发送，使得接收通信端将在消息数据开始时识别，音调长度与发送消息的频率分集一致。 从数据中提取定时以补偿多普勒频移。
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2.发明授权
公开(公告)号：US4270142A
公开(公告)日：1981-05-26
申请号：US970584
申请日：1978-12-18
CPC分类号： G01C11/025 , G01C13/00 , G01S17/89
摘要： An adaptive slant range compensator, suitable for use with an optical mapg system for remote viewing, comprises a logarithmic amplifier which compresses an analog input signal having a wide range of values to a tractable range. An analog-to-digital (A/D) converter converts the compressed signal to a 10-bit binary number. The digitized compressed data is then used to address antilog programmable read-only memories (PROMs) which contain the antilog of the address data in scientific notation. Control and data processing circuits are used to accumulate sample scans from the antilog PROMs in a summing memory, calculate an average scan from the accumulated sample scans, and transfer this average to a working memory. The data stored in the working memory is used to drive an attenuation/amplification network that divides succeeding scans by the stored average scan. In this way, the inverse transfer function is applied to the analog input signal, which forms another input to the attenuation/amplification network.
摘要翻译： 适用于远程观看的光学映射系统的自适应倾斜范围补偿器包括对数放大器，其将具有宽范围值的模拟输入信号压缩到可处理的范围。 模拟（A / D）转换器将压缩信号转换为10位二进制数。 然后将数字化的压缩数据用于以科学计数方式处理包含地址数据的反对数据的反对程序可编程只读存储器（PROM）。 控制和数据处理电路用于从求和存储器中的反对数PROM中累积样本扫描，从累积的样本扫描计算平均扫描，并将该平均值转移到工作存储器。 存储在工作存储器中的数据用于驱动通过存储的平均扫描将后续扫描分割的衰减/放大网络。 以这种方式，反向传递函数被应用于模拟输入信号，这对衰减/放大网络形成另一个输入。
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公开(公告)号：US3944967A
公开(公告)日：1976-03-16
申请号：US535542
申请日：1974-12-23
CPC分类号： G01S3/8083 , Y10S367/91
摘要： In a diver's navigation system employing a receiver having three equal, alarly disposed hydrophone locations, a digital signal processing circuit is employed which receives frequency shift keyed digital data from remote beacons. Circuitry is provided to process this data to derive a bearing indication to the beacon.
摘要翻译： 在潜水员的导航系统中，采用具有三个相等的，角度设置的水听器位置的接收器，采用数字信号处理电路，其从远程信标接收频移键控的数字数据。 提供电路以处理该数据以导出信标的方位指示。
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公开(公告)号：US5029143A
公开(公告)日：1991-07-02
申请号：US654307
申请日：1976-02-02
IPC分类号： G10K15/02
摘要： A synthesizer for complex acoustic signatures includes a generator for an ectrical analog of a complex acoustic waveform corresponding the the "shaft rub" noise produced by the interaction of a marine propeller shaft and a stern tube or other through-the-hull marine fitting. This circuitry employs digital random generators to produce a nonrecurring characteristic signal synthesizing this acoustic noise. An arrangement to process this signal with other simulation circuitry is also disclosed.
摘要翻译： 用于复合声学特征的合成器包括一个复合声波波形的电子模拟的发生器，该复合声波对应于由船用螺旋桨轴与船尾管或其他船体海上配件的相互作用产生的“轴摩擦”噪声。 该电路使用数字随机发生器来产生合成这种声学噪声的非复现特征信号。 还公开了用其他仿真电路处理该信号的装置。
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公开(公告)号：US4009452A
公开(公告)日：1977-02-22
申请号：US648615
申请日：1976-01-12
IPC分类号： H03K3/16
CPC分类号： H02M7/53835
摘要： A submarine power package converts direct current electrical energy to alnating current energy and is adapted to function while exposed to the high pressures of the deep ocean. A diode protection circuit and special semiconductor mounting arrangement makes this performance possible without the use of a pressure housing.
摘要翻译： 潜艇电力包将直流电能转换为交流电能，并适应于在暴露于深海的高压下工作。 二极管保护电路和特殊的半导体安装布置使得这种性能可以在不使用压力外壳的情况下实现。
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