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公开(公告)号：US06577855B1
公开(公告)日：2003-06-10
申请号：US09377357
申请日：1999-08-19
IPC分类号： H04B126
CPC分类号： H04B1/1638 , H04B1/28
摘要： A low IF receiver suitable for use in cellular and cordless telephones and TV tuners, comprises input signal receiving means(10), quadrature related frequency down conversion means including first and second mixing means(14, 15) having first inputs(12, 13) coupled to the input signal receiving means and a local oscillator means(16) for generating a local oscillator signal having a frequency offset from a nominal centre frequency of the input signal coupled to second inputs(18, 19) of the first and second mixing means, a channel selectivity polyphase filtering means(20) for selecting a wanted channel signal from outputs of the first and second mixing means, means(26, 28, 30) for detecting when the quality of the frequency down converted signal becomes unacceptable due a large adjacent channel interfering component and means responsive to said detection for changing the local oscillator frequency by at least twice the low IF or one channel bandwidth to displace the large interfering component outside the bandwidth of the channel selectivity polyphase filtering means(20) and simultaneously changing the centre frequency of the polyphase filter.
摘要翻译： 适用于蜂窝和无绳电话和电视调谐器的低IF接收机包括输入信号接收装置（10），正交相关频率下变频装置，包括具有第一输入端（12,13）的第一和第二混频装置（14,15） 耦合到输入信号接收装置和本地振荡器装置（16），用于产生本地振荡器信号，该本地振荡器信号具有与耦合到第一和第二混合装置的第二输入端（18,19）的输入信号的标称中心频率的偏移 ，用于从所述第一和第二混合装置的输出中选择所需信道信号的信道选择性多相滤波装置（20），用于检测所述降频转换信号的质量何时被大量接收的装置（26,28,30） 相邻信道干扰分量和响应于所述检测的装置，用于将本地振荡器频率改变至少两倍的低IF或一个信道带宽以置换大干扰化合物 在通道选择性多相滤波装置（20）的带宽之外，同时改变多相滤波器的中心频率。
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公开(公告)号：US6035186A
公开(公告)日：2000-03-07
申请号：US815099
申请日：1997-03-11
申请人： Paul A. Moore , Michael E. Barnard
发明人： Paul A. Moore , Michael E. Barnard
CPC分类号： H03H7/21 , H03D3/008 , H03D3/009 , H04B1/30 , H03H2007/0192
摘要： An integrated receiver in which in order to permit ac-coupling between stages and to remove the effects of strong directly detected amplitude modulated interfering signals lying within the input band of the receiver, the input signal is frequency down converted using a local oscillator signal which provides an intermediate frequency (F.sub.if) which lies above the frequency of the directly detected interferer (F.sub.AMP). The outputs from the frequency down converters (14, 16, 18, 20) are ac coupled to filtering means the outputs of which are applied to an equalizer (52). The filtering means may comprise a polyphase filter (50), the frequency response of which is distorted by the ac coupling capacitors (54, 56). By applying the outputs of the filtering means to the equalizer (52) substantially all the distortion introduced by the ac coupling capacitors (54, 56) on the filter response is removed to provide an acceptable signal for detection and recovery of the modulating signal.
摘要翻译： 一种集成接收机，其中为了允许级之间的交流耦合并且消除位于接收机的输入频带内的强直接检测的调幅干扰信号的影响，输入信号使用提供的本地振荡器信号进行降频转换 位于直接检测到的干扰源（FAMP）的频率之上的中频（Fif）。 来自降频转换器（14,16,18,20）的输出被耦合到滤波装置，其输出被施加到均衡器（52）。 滤波装置可以包括多相滤波器（50），其频率响应由交流耦合电容器（54,56）变形。 通过将滤波装置的输出施加到均衡器（52），消除了由交流耦合电容器（54,56）引入的滤波器响应所引起的所有失真，以提供用于调制信号的检测和恢复的可接受的信号。
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公开(公告)号：US07020106B2
公开(公告)日：2006-03-28
申请号：US09920041
申请日：2001-08-01
IPC分类号： H04Q7/00
CPC分类号： H04W36/16 , H04L12/5692 , H04L69/08 , H04W88/00
摘要： A radio communication system a primary station and a secondary station operating according to two (or more) two-way communication modes. An uplink and/or a downlink communication channel is present for the first mode, but only one of an uplink and a downlink channel is present for the second mode. Modifications to the protocols of the first and second modes enable the traffic for an absent communication channel of one mode to be carried by the corresponding channel of the other mode.
摘要翻译： 一种无线电通信系统，一个主站和一个根据两个（或多个）双向通信模式操作的次站。 对于第一模式存在上行链路和/或下行链路通信信道，但是对于第二模式仅存在上行链路和下行链路信道中的一个。 对第一和第二模式的协议的修改使得一种模式的缺少通信信道的业务可以由另一模式的相应信道承载。
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公开(公告)号：US06859657B1
公开(公告)日：2005-02-22
申请号：US09379955
申请日：1999-08-24
申请人： Michael E. Barnard
发明人： Michael E. Barnard
CPC分类号： A61B5/0028 , H04B1/385 , H04B2001/3866 , H04B2001/3872
摘要： A personal communications apparatus comprises a first part, having a microphone (114), and a second part, having a loudspeaker (118). The first part is adapted to be worn on a user's wrist (202) and the second part is adapted to be worn on their finger. In use, the user's hand is held up to the side of their head, thereby placing the microphone (114) adjacent to their mouth and the loudspeaker (118) adjacent to their ear. Communication between first and second parts of the apparatus is by means of signals transmitted via the user's skin.In a non-illustrated embodiment the second part is adapted to be worn on the ear.
摘要翻译： 个人通信装置包括具有麦克风（114）的第一部分和具有扬声器（118）的第二部分。 第一部分适于佩戴在用户的手腕（202）上，并且第二部分适于佩戴在他们的手指上。 在使用中，用户的手被保持在其头部侧面，从而将麦克风（114）邻近他们的嘴和扬声器（118）放置在他们的耳朵附近。 设备的第一和第二部分之间的通信是通过经由用户的皮肤传输的信号。在未示出的实施例中，第二部分适于佩戴在耳朵上。
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公开(公告)号：US5241561A
公开(公告)日：1993-08-31
申请号：US641388
申请日：1991-01-15
申请人： Michael E. Barnard
发明人： Michael E. Barnard
摘要： A radio receiver (16) for direct sequence spread spectrum signals incorporates a quadrature zero-IF architecture, means for comb filtering (36,37) the two quadrature related channels (I and Q) and a means of non-coherent demodulation of each channel; the non-coherent demodulating means comprising delays (40,41) and mixers (42,43). This process obviates the need for locally generated versions of the spreading code used to produce the signals and considerably shortens the time-consuming process of correlating the received and the locally generated codes at receiver switch-on.
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公开(公告)号：US5119101A
公开(公告)日：1992-06-02
申请号：US703224
申请日：1991-05-20
申请人： Michael E. Barnard
发明人： Michael E. Barnard
摘要： When fewer than three of the satellites of a satellite global positioning system (GPS) such as NAVSTAR are visible to a user (15), the user cannot obtain independent positional information from the system. Since a satellite (11) in such a system is moving with respect to a user (15), its signals are received with a Doppler offset from their normal centre frequency and the frequency offset due to the satellite motion alone is calculable for a user at an approximate location from a given satellite. An additional Doppler frequency offset will result from any movement of the user. The magnitude of the additional frequency shift, in conjunction with the known speed (m) of the user, can be used to calculate the angle between the satellite motion (V.sub.1) and the user's motion and since the direction of the former is known, the user's heading from local North (N) can be calculated in instances where only one or two GPS satellites (11,12) are visible to a user.
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7.发明授权Radio receiver circuit with tuning feedback control for a tunable bandpass filter 失效无线电接收机电路，具有可调谐带通滤波器的调谐反馈控制
公开(公告)号：US4965853A
公开(公告)日：1990-10-23
申请号：US414805
申请日：1989-09-29
申请人： Michael E. Barnard
发明人： Michael E. Barnard
CPC分类号： H03D3/008 , H01L24/49 , H03D7/165 , H03D9/06 , H03J7/08 , H01L2223/6611 , H01L2224/48091 , H01L2224/48247 , H01L2224/49113 , H01L2924/00014 , H01L2924/01006 , H01L2924/01023 , H01L2924/01033 , H01L2924/01074 , H01L2924/01082 , H01L2924/12034 , H01L2924/14 , H01L2924/19041 , H01L2924/19042 , H01L2924/19043 , H01L2924/30105 , H01L2924/30107 , H01L2924/3011 , H03B27/00 , H03D3/007
摘要： A zero-IF radio receiver circuit comprises an input filter (3), quadrature mixers (9,10), d.c.-blocking capacitors (24,26) and a demodulator (22). The circuit is partly integrated on a semiconductor chip and an inductive component of the input filter comprises one or more of the chip bond-wires. In order to compensate for the inevitable variation of the inductance of these bond-wires from circuit to circuit part of the signal from the local oscillator (12) is added to the input signal before its application to the input filter and the d.c. component of the resulting output from one mixer (10), which component is representative of the phase shift of the local oscillator signal produced by the input filter and hence of any tuning error of this filter, is applied to a tuning control input (30) of the filter to reduce the error. Alternatively the tuning control signal may be adjusted to maximize the sum of the squares of the d.c. components of the signals in the two IF channels and hence minimize the attenuation produced by the input filter.
摘要翻译： 零中频无线电接收机电路包括输入滤波器（3），正交混频器（9,10），直流隔离电容器（24,26）和解调器（22）。 该电路部分集成在半导体芯片上，并且输入滤波器的电感元件包括一个或多个芯片接合线。 为了补偿这些接合线从电路到电路的电感的不可避免的变化，来自本地振荡器（12）的信号的一部分在其应用于输入滤波器和直流电压之前被添加到输入信号。 来自一个混频器（10）的所得输出的分量被施加到调谐控制输入（30），该分量代表由输入滤波器产生的本地振荡器信号和因此该滤波器的任何调谐误差的相移， 的过滤器来减少误差。 或者，可以调整调谐控制信号以最大化直流电平的平方和。 两个IF通道中信号的分量，从而最小化由输入滤波器产生的衰减。
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公开(公告)号：US4633117A
公开(公告)日：1986-12-30
申请号：US645769
申请日：1984-08-30
CPC分类号： H03H9/72 , G06G7/195 , H03H9/14547 , H03H9/14555 , H03H9/14594 , H03H2240/00
摘要： A surface acoustic wave device comprises a transducer 1 consisting of two electrodes 2 and 3 deposited on the surface of a substrate 4. Transducer 1 is a slanted chirped transducer with short fingers 5 and 6 to focus any acoustic wave generated in the transducer to a position along a line 8 spaced from transducer dependent on the frequency of the signal.
摘要翻译： 表面声波装置包括由沉积在基板4的表面上的两个电极2和3组成的换能器1.换能器1是具有短指状物5和6的倾斜的啁啾换能器，以将在换能器中产生的任何声波聚焦到位置 沿着与传感器间隔的线8，其取决于信号的频率。
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公开(公告)号：USRE35498E
公开(公告)日：1997-04-29
申请号：US250782
申请日：1994-05-27
申请人： Michael E. Barnard
发明人： Michael E. Barnard
IPC分类号： G01C21/00 , G01S1/00 , G01S5/00 , G01S5/14 , G01S19/09 , G01S19/41 , H04Q7/34 , H04B7/185 , G01S5/02
CPC分类号： G01S5/0036 , G01S19/09 , G01S19/41
摘要： Signals from a number of NAVSTAR global positioning system (GPS) satellites (11,12,13,14) are received by a receiver (16) in a vehicle (15) and a segment of the signals is stored in a memory (18) prior to retransmission by a transmitter (19). A base station (35) receives these transmissions from the mobile unit using a first receiver (36). The base station also receives signals directly from the NAVSTAR GPS satellites using a second receiver (38). A control and calculating apparatus (37) within the base station can determine the ephemeris (course) information for the satellites and can measure the transmission times or propagation delays of signals between the satellites and the vehicle and with this information the control and calculating apparatus can calculate the position of the vehicle unit.
摘要翻译： 来自多个NAVSTAR全球定位系统（GPS）卫星（11,12,13,14）的信号由车辆（15）中的接收机（16）接收，并且一段信号被存储在存储器（18）中， 在由发射机（19）重传之前。 基站（35）使用第一接收机（36）从移动单元接收这些传输。 基站还使用第二接收机（38）从NAVSTAR GPS卫星直接接收信号。 基站内的控制和计算装置（37）可以确定卫星的星历（航线）信息，并且可以测量卫星和车辆之间的信号的传输时间或传播延迟，并且利用该信息，控制和计算装置可以 计算车辆单元的位置。
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公开(公告)号：US5119102A
公开(公告)日：1992-06-02
申请号：US644792
申请日：1991-01-23
申请人： Michael E. Barnard
发明人： Michael E. Barnard
CPC分类号： G01S5/0036 , G01S19/09 , G01S19/41
摘要： Signals from a number of NAVSTAR global positioning system (GPS) satellites (11,12,13,14) are received by a receiver (16) in a vehicle (15) and a segment of the signals is stored in a memory (18) prior to retransmission by a transmitter (19). A base station (35) receives these transmissions from the mobile unit using a first receiver (36). The base station also receives signals directly from the NAVSTAR GPS satellites using a second receiver (38). A control and calculating apparatus (37) within the base station can determine the ephemeris (course) information for the satellites and can measure the transmission times or propagation delays of signals between the satellites and the vehicle and with this information the control and calculating apparatus can calculate the position of the vehicle unit.
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