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    Radio frequency transmission system
    2.
    发明授权
    Radio frequency transmission system 失效
    射频传输系统

    公开(公告)号：US4312072A

    公开(公告)日：1982-01-19

    申请号：US108460

    申请日：1979-12-31

    申请人： Klaus Vogel

    发明人： Klaus Vogel

    IPC分类号： H04L27/10 ,  H04B14/00 ,  H04B14/04 ,  H04K1/00 ,  H04L27/02 ,  H04L7/06

    CPC分类号： H04B14/002 ,  H04K1/003

    摘要： Radio transmission system in which the carrier frequency oscillator at the transmitter is wobbulated by varying its frequency in a periodic manner and modulated and transmitted to a receiving site where the detected signal is passed through two separate paths, one being supplied to a converter and the other is supplied to the converter through a delay line. The output of the converter comprises an intermediate frequency which contains the modulation which is then demodulated and detected. Modification of the invention provides for transmitting two or more separate intelligences on the carrier and detecting the two intelligences at the receiver.

    摘要翻译： 无线电传输系统，其中发射机的载波频率振荡器通过以周期性方式改变其频率而被摆动并被调制并发送到接收站点，在该接收站点处，检测到的信号通过两条分离的路径，一个被提供给转换器，另一个被提供给转换器 通过延迟线提供给转换器。 转换器的输出包括一个包含调制信号的中间频率，然后被解调和检测。 本发明的修改提供了在载波上发送两个或多个单独的智能并且在接收机处检测两个智能。

    Methods and apparatus for reducing intelligible crosstalk in single sideband radio systems
    3.
    发明授权
    Methods and apparatus for reducing intelligible crosstalk in single sideband radio systems 失效
    用于减少单边带无线电系统中的可理解串扰的方法和装置

    公开(公告)号：US4019140A

    公开(公告)日：1977-04-19

    申请号：US625491

    申请日：1975-10-24

    申请人： Richard Barry Swerdlow

    发明人： Richard Barry Swerdlow

    IPC分类号： H03M5/08 ,  H03C5/00 ,  H04B1/68 ,  H04B14/00 ,  H04L25/08 ,  H03B23/00 ,  H04B1/62

    CPC分类号： H04B14/002 ,  H04B1/68 ,  H03B2200/0092

    摘要： Intelligible crosstalk in microwave radio systems employing single-sideband modulation is substantially eliminated by phase-modulating the AM carrier-wave prior to its modulation by the baseband signal. The phase-modulation may comprise a periodic signal, such as a single sinusoidal tone or pseudo-random noise, or it may comprise an aperiodic signal such as a truly random noise. In this latter event, the coding signal is transmitted to the receiving location to ensure proper demodulation of the encoded signal.

    摘要翻译： 采用单边带调制的微波无线电系统中的智能串扰基本上被基带信号调制之前相位调制AM载波消除。 相位调制可以包括诸如单个正弦音调或伪随机噪声的周期性信号，或者它可以包括诸如真正随机噪声的非周期性信号。 在后一种情况下，将编码信号发送到接收位置，以确保编码信号的正确解调。

    Signal transmission and modulation technique therefor
    4.
    发明授权
    Signal transmission and modulation technique therefor 失效
    信号传输及其调制技术

    公开(公告)号：US3732495A

    公开(公告)日：1973-05-08

    申请号：US3732495D

    申请日：1970-07-20

    申请人： RADIATION INC

    发明人： MCRAE D ,  PALERMO C ,  PELCHAT M

    IPC分类号： H04B14/00 ,  H04B1/00

    CPC分类号： H04B14/002

    摘要： Two separate signals are derived as indicative of the information content of each of a plurality of discrete time samples of an input waveform. One of these signals effectively constitutes a stretching of the respective sample, and hence of the input waveform, by designating the deviation of the sample amplitude (or other selected parameter) from an unknown one of a set of discretely increasing reference levels greater in number than two, in a magnified format. The second signal designates the reference level with respect to which the deviation pertains, and thus resolves the ambiguity associated with the first signal. The first and second signals, or an appropriate combination thereof, are impressed on a carrier for transmission to a remote receiving station. Accompanying noise resulting from transmission is compressed in a ratio equal to the ratio of compression of the first signal at the receiving station, to reconstruct the original waveform.

    摘要翻译： 导出两个单独的信号来表示输入波形的多个离散时间样本中的每一个的信息内容。 这些信号中的一个通过指定样本幅度（或其他选定参数）与一组离散增加的参考水平中的未知数量的偏差而有效地构成相应样本的拉伸，并因此构成输入波形的拉伸，数量比 二，放大格式。 第二信号指定与偏差相关的参考电平，从而解决与第一信号相关联的模糊度。 第一和第二信号或其适当的组合被印在载体上用于传输到远程接收站。 传输产生的伴随噪声的压缩比等于接收站处的第一信号的压缩比，以重构原始波形。

    Silent subliminal presentation system
    7.
    发明授权
    Silent subliminal presentation system 失效
    沉默的潜意识呈现系统

    公开(公告)号：US5159703A

    公开(公告)日：1992-10-27

    申请号：US458339

    申请日：1989-12-28

    申请人： Oliver M. Lowery

    发明人： Oliver M. Lowery

    IPC分类号： G11B20/02 ,  G11B20/10 ,  H04B14/00 ,  H04R27/00

    CPC分类号： H04B14/002 ,  G11B20/02 ,  G11B20/10 ,  H04R27/00

    摘要： A silent communications system in which nonaural carriers, in the very low or very high audio frequency range or in the adjacent ultrasonic frequency spectrum, are amplitude or frequency modulated with the desired intelligence and propagated acoustically or vibrationally, for inducement into the brain, typically through the use of loudspeakers, earphones or piezoelectric transducers. The modulated carriers may be transmitted directly in real time or may be conveniently recorded and stored on mechanical, magnetic or optical media for delayed or repeated transmission to the listener.

    摘要翻译： 无声通信系统，其中非常低或非常高的音频范围或相邻的超声波频谱中的非军事载体是以期望的智能进行幅度或频率调制的并且在声学或振动上传播以诱导入脑，通常通过 使用扬声器，耳机或压电换能器。 调制的载波可以被实时直接发送或者可以被方便地记录并存储在机械，磁或光介质上，以便延迟或重复传输到收听者。

    Frequency rate communication system
    8.
    发明授权
    Frequency rate communication system 失效
    频率通信系统

    公开(公告)号：US3754101A

    公开(公告)日：1973-08-21

    申请号：US3754101D

    申请日：1971-07-02

    申请人： UNIVERSAL SIGNAL CORP

    发明人： DASPIT J ,  JACKMAN R ,  WEBER C

    IPC分类号： H04B14/00 ,  H04J1/06 ,  H04J99/00

    CPC分类号： H04J1/06 ,  H04B14/002 ,  H04J1/065 ,  H04J15/00

    摘要： A communication system for transmitting a plurality of analog or digital information signals to a receiver with an improvement in band width utilization over conventional systems. A system with a plurality of swept frequency encoding signals, each frequency modulated at the same rate but with different phase, and in the preferred embodiment, means for amplitude modulating each encoding signal with a double sideband, suppressed carrier signal which may comprise two information signals, with the modulator outputs summed to provide a combined signal for further processing incorporating additional information signals and/or for transmission to a receiver. A system utilizing three such modulation arrangements for eighteen information signals and three combined signals, with the three combined signals used for amplitude modulating another set of three swept frequency encoding signals to provide a further combined signal for transmission to a receiver. A receiver with a decoding system providing the reverse of the encoding system. A receiver wherein one or more of the transmitted information signals can be selected for reproduction.

    摘要翻译： 一种用于将多个模拟或数字信息信号发送到接收机的通信系统，其具有比常规系统更好的带宽利用率。 具有多个扫频编码信号的系统，每个频率以相同的速率调制，但具有不同的相位，并且在优选实施例中，用于利用双边带幅度调制每个编码信号的装置，所述载波信号可以包括两个信息信号 调制器输出相加以提供用于进一步处理并入附加信息信号和/或传输到接收机的组合信号。 对于十八个信息信号和三个组合信号利用三个这样的调制装置的系统，三个组合信号用于振幅调制另一组三个扫频编码信号，以提供另一组合信号以传输到接收机。 具有提供编码系统相反的解码系统的接收机。 一种接收器，其中可以选择一个或多个所发送的信息信号进行再现。