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15 条记录 (耗时 0.02 秒)

    Radio receiver
    2.
    发明授权
    Radio receiver 失效
    无线电接收机

    公开(公告)号：US4618967A

    公开(公告)日：1986-10-21

    申请号：US624749

    申请日：1984-06-26

    申请人： Ian A. W. Vance ,  Michael W. Neale

    发明人： Ian A. W. Vance ,  Michael W. Neale

    IPC分类号： H04L27/00 ,  H03D1/22 ,  H03D3/00 ,  H04L27/14 ,  H04L27/152 ,  H04B1/16

    CPC分类号： H03D3/007 ,  H04L27/1525 ,  A23V2002/00 ,  H03D1/22

    摘要： A radio receiver for frequency modulated signals in which direct conversion techniques are used to provide zero I.F. quadrature baseband signals I & Q. The I & Q signals are limited (11,12) to form square wave signals and pulse forming networks (13,14) derive pulse sequences the frequencies of which represent the polarity changes in the square wave signals. Each square wave is multiplied (15,16) by the pulse sequence derived from the other square wave to produce a unipolar pulse train. The two unipolar pulse trains are combined (17) to give a digital output signal the frequency of which is equal to the sum of the frequencies of the two pulse trains. Low pass filtering the output signal produces a simulation of the original baseband modulation.

    摘要翻译： 用于频率调制信号的无线电接收机，其中使用直接转换技术来提供零I.F。 正交基带信号I＆Q。I＆Q信号被限制（11,12）以形成方波信号，脉冲形成网络（13,14）导出其频率表示方波信号极性变化的脉冲序列。 每个方波乘以（15,16）由其他方波导出的脉冲序列，以产生单极脉冲序列。 组合两个单极脉冲串（17）以产生数字输出信号，其频率等于两个脉冲序列的频率之和。 低通滤波输出信号产生原始基带调制的仿真。

    A/D converters
    3.
    发明授权
    A/D converters 失效
    A / D转换器

    公开(公告)号：US4726042A

    公开(公告)日：1988-02-16

    申请号：US829068

    申请日：1986-02-13

    申请人： Ian A. W. Vance

    发明人： Ian A. W. Vance

    IPC分类号： H03M1/12 ,  H03D1/24 ,  H03D3/00 ,  H04B1/62 ,  H04B14/04 ,  H04B1/10

    CPC分类号： H03D1/24 ,  H03D3/007 ,  H03D2200/005 ,  H03D2200/0054 ,  H03D3/006

    摘要： An analogue-to-digital converter arrangement including a signal de-emphasis network 10.sub.I, 10.sub.Q which attenuates higher frequency analogue signals relative to lower frequency analogue signals, an A/D converter 11.sub.I, 11.sub.Q to which the de-emphasised signals are applied, and a pre-emphasis network 12.sub.I, 12.sub.Q substantially complementary to the de-emphasis network to which the digitised signals are applied.

    摘要翻译： 一种模数转换器装置，包括相对于较低频模拟信号衰减较高频模拟信号的信号去加重网络10I，10Q，施加去加重信号的A / D转换器11I，11Q，以及 与被加数字化信号的去加重网络实质上互补的预加重网络12I，12Q。

    Direct conversion radio receiver for FM signals
    5.
    发明授权
    Direct conversion radio receiver for FM signals 失效
    用于FM信号的直接转换无线电接收器

    公开(公告)号：US4521892A

    公开(公告)日：1985-06-04

    申请号：US415782

    申请日：1982-09-08

    申请人： Ian A. W. Vance ,  John K. Goatcher

    发明人： Ian A. W. Vance ,  John K. Goatcher

    IPC分类号： H04L27/14 ,  H03D3/00 ,  H03D7/16 ,  H04L27/152

    CPC分类号： H04L27/1525 ,  H03D3/007 ,  H03D7/165

    摘要： A radio receiver for FM signals having a demodulation system to produce an approximation to an analog output by either measuring the time intervals between successive zero crossings in the I.F. (FIG. 1, FIG. 2B) or by filtering pulses produced at each zero crossing of the I.F. (FIG. 1, FIG. 2A). The demodulator includes two signal pathways in quadrature phase relation, the second signal either lagging or leading the first signal in dependence on whether the received signal frequency is above or below a local oscillator frequency. The modulation frequency can carry analog information separate and apart from the on-off (digital) information.

    摘要翻译： 一种用于FM信号的无线电接收机，具有解调系统，以通过测量I.F中的连续过零点之间的时间间隔来产生对模拟输出的近似。 （图1，图2B）或通过对在I.F.的每个过零点产生的脉冲进行滤波。 （图1，图2A）。 解调器包括正交相位关系的两个信号路径，第二信号根据接收的信号频率是高于还是低于本地振荡器频率来滞后或引导第一信号。 调制频率可以将开关（数字）信息分开并分开放置模拟信息。

    Single channel duplex communication system
    6.
    发明授权
    Single channel duplex communication system 失效
    单通道双工通信系统

    公开(公告)号：US4480327A

    公开(公告)日：1984-10-30

    申请号：US559167

    申请日：1983-12-07

    申请人： Ian A. W. Vance

    发明人： Ian A. W. Vance

    IPC分类号： H04L27/14 ,  H03D3/00 ,  H04B1/40 ,  H04B1/56 ,  H04L5/14 ,  H04L27/10 ,  H04L27/12

    CPC分类号： H04B1/56 ,  H03D3/007 ,  H04L27/10 ,  H04B1/408

    摘要： A single channel duplex transmitter/receiver utilizing digital frequency shift keying (FSK) signals. An analogue-to-digital converter frequency modulates the output of a local oscillator whose output is coupled via a mixer/combiner/splitter network to an aerial. FSK signals received from the aerial in the receiver are mixed with the local oscillator output in network to provide quadrature signals which are low-pass filtered before being demodulated in a zero IF demodulator to give a digital output. To avoid unwanted sidetone the output of the A/D converter is fed through a delay to a digital network where it is subtracted from the corresponding signals fed back through the demodulator. The digital signals are then fed to a D/A converter.

    摘要翻译： 采用数字频移键控（FSK）信号的单通道双工发射机/接收机。 模拟 - 数字转换器对输出通过混频器/组合器/分离器网络耦合到天线的本地振荡器的输出进行调制。 在接收机中从天线接收的FSK信号与网络中的本地振荡器输出混合，以提供在零中频解调器解调之前进行低通滤波以提供数字输出的正交信号。 为了避免不必要的侧音，A / D转换器的输出通过延迟馈送到数字网络，在数字网络中，通过解调器反馈的相应信号减去该数字网络。 然后将数字信号馈送到D / A转换器。

    Decoding logic for frequency shift keying receiver
    7.
    发明授权
    Decoding logic for frequency shift keying receiver 失效
    频移键控接收机的解码逻辑

    公开(公告)号：US4322851A

    公开(公告)日：1982-03-30

    申请号：US181591

    申请日：1980-08-27

    申请人： Ian A. W. Vance

    发明人： Ian A. W. Vance

    IPC分类号： H04L27/14 ,  H04L27/152

    CPC分类号： H04L27/1525

    摘要： A radio receiver employing paired signal paths with frequency shift keying. In each signal path pair in which demodulated signals in quadrature are produced, the outputs of the limiting amplifiers are connected to two pairs of flip-flops so that the phase changes in the amplifier outputs are indicated. The outputs of the flip-flops are selectively summed in two gates to drive the inputs of a further flip-flop the output of which is the decoded output signal.

    摘要翻译： 采用频移键控的配对信号路径的无线电接收机。 在其中产生正交解调信号的每个信号路径对中，限幅放大器的输出连接到两对触发器，使得放大器输出中的相位变化被指示。 触发器的输出被选择性地相加在两个门中以驱动另一个触发器的输入，其输出是解码的输出信号。

    Synchronization of digital radio pager
    8.
    发明授权
    Synchronization of digital radio pager 失效
    数字无线寻呼机同步

    公开(公告)号：US4506262A

    公开(公告)日：1985-03-19

    申请号：US398472

    申请日：1982-07-15

    申请人： Ian A. W. Vance ,  Colin Jeffrey ,  Brian A. Bidwell ,  David F. A. Leevers ,  Michael J. A. Woodley

    发明人： Ian A. W. Vance ,  Colin Jeffrey ,  Brian A. Bidwell ,  David F. A. Leevers ,  Michael J. A. Woodley

    IPC分类号： H04L7/033 ,  H04L7/04 ,  H04L7/08 ,  H04L7/10 ,  H04W88/02 ,  H04Q9/00 ,  H04B1/16

    CPC分类号： H04W88/026 ,  H04L7/10 ,  H04L7/0331 ,  H04L7/046 ,  H04L7/08

    摘要： A method of synchronizing a digital radio pager receiver with incoming digital data signals. At switch-on the receiver first attains a "course" bit synch during the first quarter-word period and then a "fine" bit synch during the next half-word period. The receiver then examines incoming data bits to determine simultaneously (a) whether valid data is being received and (b) whether the incoming data contains a preamble sequence. If either determination is successful the incoming data is then examined to determine whether it contains a synchronizing word or an address word. The synchronization and address word determination is also carried out while bit synch is obtained and the valid data/preamble determination is effected.

    摘要翻译： 一种使数字无线寻呼机接收机与输入的数字数据信号同步的方法。 在接通时，接收机首先在第一个四分之一字周期期间达到“路由”位同步，然后在下一个半字周期期间“精细”同步。 接收机然后检查输入数据位以同时确定（a）是否正在接收有效数据，以及（b）输入数据是否包含前导码序列。 如果任一确定成功，则检查输入数据以确定其是否包含同步字或地址字。 同步和地址字确定也在获得位同步并执行有效的数据/前同步码确定的同时进行。

    Transmitter/receiver for single channel duplex communication system
    9.
    发明授权
    Transmitter/receiver for single channel duplex communication system 失效
    用于单通道双工通信系统的发射机/接收机

    公开(公告)号：US4238850A

    公开(公告)日：1980-12-09

    申请号：US964764

    申请日：1978-11-29

    申请人： Ian A. W. Vance

    发明人： Ian A. W. Vance

    IPC分类号： H04B1/54 ,  H04B14/00 ,  H04B1/58

    CPC分类号： H04B1/54

    摘要： A transmitter receiver which can be used for a cordless telephone using radio communication. The receiver produces direct conversion from the radio frequency. Local oscillator frequency is modulated by an audio signal to be sent, the modulated signals being passed through a dual splitting and combining network. The splitting network has directional properties for duplex operation. The receiver processes the signals through a differential amplifier to cancel unwanted signals.

    摘要翻译： 一种可用于使用无线电通信的无绳电话的发射机接收机。 接收机从射频产生直接转换。 本地振荡器频率由要发送的音频信号调制，调制信号通过双分频和组合网络传输。 分离网络具有用于双工操作的定向属性。 接收器通过差分放大器处理信号以消除不需要的信号。

    Demodulator logic for frequency shift keyed signals
    10.
    发明授权
    Demodulator logic for frequency shift keyed signals 失效
    用于频移键控信号的解调器逻辑

    公开(公告)号：US4571738A

    公开(公告)日：1986-02-18

    申请号：US613426

    申请日：1984-05-24

    申请人： Ian A. W. Vance

    发明人： Ian A. W. Vance

    IPC分类号： H04L27/14 ,  H04L27/152

    CPC分类号： H04L27/1525

    摘要： A demodulator logic for FSK signals on an RF carrier in a direct conversion radio receiver, wherein the received signals are mixed with a local oscillator to provide quadrature baseband signals, characterized in that the demodulator logic comprises two clocked D-type flip-flops, FF1,FF2 one baseband signal being applied direct to the clock input CK of one flip-flop and inverted to the clock input CK of the other flip-flop, the second baseband signal being applied to the D inputs of both flip-flops, one input Q from one flip-flop being algebraically combined with one output Q from the other flip-flop to provide a demodulator signal output of the receiver, the two flip-flop outputs being chosen so that for a given FSK value they always have the same logic value.

    摘要翻译： 一种用于直接转换无线电接收机中的RF载波上的FSK信号的解调器逻辑，其中所接收的信号与本地振荡器混合以提供正交基带信号，其特征在于，解调器逻辑包括两个时钟D型触发器，FF1 ，FF2一个基带信号直接施加到一个触发器的时钟输入CK并被反相到另一个触发器的时钟输入CK，第二基带信号被施加到两个触发器的D个输入，一个输入 来自一个触发器的Q来自另一个触发器的一个输出和upbar＆Q的代数组合，以提供接收器的解调器信号输出，选择两个触发器输出，使得对于给定的FSK值，它们总是具有相同的 逻辑值。