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公开(公告)号：US06088407A
公开(公告)日：2000-07-11
申请号：US151854
申请日：1998-09-11
申请人： Barry D. Buternowsky , Edward J. Anthony , Mihaela C. Beluri , Xavier Carbo Figueras , Robert Addison Langridge, Jr. , Robert Richard Leyendecker , Glaudio Gustavo Rey , Desmond Wai Ming Yan
发明人： Barry D. Buternowsky , Edward J. Anthony , Mihaela C. Beluri , Xavier Carbo Figueras , Robert Addison Langridge, Jr. , Robert Richard Leyendecker , Glaudio Gustavo Rey , Desmond Wai Ming Yan
CPC分类号： H04W84/025 , H04B7/084 , H04B7/0865 , H04B7/0885
摘要： A two-way paging system includes one or more transmitters, a plurality of receivers, and at least one two-way personal paging unit or pager. The two-way pager receives pages from the transmitter, and sends response signals which are detected by the receivers. The response signals are in the form of digital packets, including forward error correction encoding and digital symbols that each consists of a predetermined number of bits. The receivers detecting the response signals decode the response packets to verify their accuracy and to identify the digital symbols. At the receivers, "accuracy indicators" can be associated with the detected symbols, providing an indication of the probability of accuracy. In one embodiment ("microdiversity receiver") two receiver components are provided at a single receiver site, with a separate antenna for each receiver component. Signals as received at the different components can be compared and have the accuracy indication information combined to increase the reliability of the system in detecting and decoding the pager response symbols. A central controller receives information from several receivers and similarly processes and analyzes it to determine the most likely response signal sent by a pager.
摘要翻译： 双向寻呼系统包括一个或多个发射机，多个接收机和至少一个双向个人寻呼单元或寻呼机。 双向寻呼机从发射机接收页面，并发送由接收机检测到的响应信号。 响应信号是数字分组的形式，包括前向纠错编码和每个由预定位数组成的数字符号。 检测响应信号的接收机对响应分组进行解码，以验证其准确性并识别数字符号。 在接收机处，“精度指示符”可以与检测到的符号相关联，提供精度概率的指示。 在一个实施例（“微分集接收机”）中，在单个接收机站点处提供两个接收机组件，其中每个接收机组件具有单独的天线。 可以比较在不同组件处接收到的信号，并组合精度指示信息，以增加系统在检测和解码寻呼机响应符号时的可靠性。 中央控制器从多个接收器接收信息，并且类似地对其进行处理和分析，以确定寻呼机发送的最可能的响应信号。
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公开(公告)号：US5809090A
公开(公告)日：1998-09-15
申请号：US611461
申请日：1996-03-04
申请人： Barry D. Buternowsky , Edward J. Anthony , Mihaela C. Beluri , Xavier Carbo Figueras , Robert Addison Langridge, Jr. , Robert Richard Leyendecker , Glaudio Gustavo Rey , Desmond Wai Ming Yan
发明人： Barry D. Buternowsky , Edward J. Anthony , Mihaela C. Beluri , Xavier Carbo Figueras , Robert Addison Langridge, Jr. , Robert Richard Leyendecker , Glaudio Gustavo Rey , Desmond Wai Ming Yan
CPC分类号： H04W84/025 , H04B7/084 , H04B7/0865 , H04B7/0885
摘要： A two-way paging system includes one or more transmitters, a plurality of receivers, and at least one two-way personal paging unit or pager. The two-way pager receives pages from the transmitter, and sends response signals which are detected by the receivers. The response signals are in the form of digital packets, including forward error correction encoding and digital symbols that each consists of a predetermined number of bits. The receivers detecting the response signals decode the response packets to verify their accuracy and to identify the digital symbols. At the receivers, "accuracy indicators" can be associated with the detected symbols, providing an indication of the probability of accuracy. In one embodiment ("microdiversity receiver") two receiver components are provided at a single receiver site, with a separate antenna for each receiver component. Signals as received at the different components can be compared and have the accuracy indication information combined to increase the reliability of the system in detecting and decoding the pager response symbols. A central controller receives information from several receivers and similarly processes and analyzes it to determine the most likely response signal sent by a pager.
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3.发明授权
公开(公告)号：US5923712A
公开(公告)日：1999-07-13
申请号：US850940
申请日：1997-05-05
申请人： Robert Richard Leyendecker , Jay Jui-Chieh Chen , Armando Cova Garrido , Yan Guo , Vladimir Pavlovic , Claudio Gustavo Rey , Desmond Wai Ming Yan
发明人： Robert Richard Leyendecker , Jay Jui-Chieh Chen , Armando Cova Garrido , Yan Guo , Vladimir Pavlovic , Claudio Gustavo Rey , Desmond Wai Ming Yan
CPC分类号： H03F1/3247 , H03F2201/3224 , H03F2201/3233
摘要： A system for linearly transmitting an amplified output signal using predistortion whereby a straight inverse modeling scheme is used to more easily and accurately determine the inverse of the distortion caused by a power amplifier of a RF transmitter. The "inverse" of the power amplifier is directly modeled by considering the power amplifier as a signal processing block with the input and output ports reversed. As a result, the computationally intensive inversion required by conventional schemes is avoided. The predistorter system stores complex coefficients in a predistorter LUT, which are then used as the tap weights of a digital filter implementing the predistorter. The predistortion is done by a non-linear filter which incorporates both instantaneous and average envelope power or magnitude effects. The predistortion LUT is addressed as a function of the instantaneous envelope power or magnitude and past power or magnitude envelopes. This scheme takes into account the instantaneous envelope power or magnitude of the current sample and a profile of the envelope power or magnitude of previous samples to accurately compensate for modulation envelope memory effects of the power amplifier. The past powers or magnitudes provide an indication of the trajectory of the power or magnitude leading to the current power or magnitude, which enables the predistorter to more accurately compensate for the power amplifier distortion. The predistorter LUT is updated with values that are indexed as a function of the powers or magnitudes of past samples and the power or magnitude of the current sample.
摘要翻译： 一种用于使用预失真线性地传输放大的输出信号的系统，由此使用直的逆建模方案来更容易且准确地确定由RF发射机的功率放大器引起的失真的倒数。 通过考虑功率放大器作为输入和输出端口反转的信号处理块，直接建模功率放大器的“反向”。 结果，避免了常规方案所需的计算密集型反转。 预失真器系统将复数系数存储在预失真器LUT中，然后将其用作实现预失真器的数字滤波器的抽头权重。 预失真由非线性滤波器完成，其包含瞬时和平均包络功率或幅度效应。 预失真LUT作为瞬时包络功率或幅度以及过去功率或幅度包络的函数来寻址。 该方案考虑了当前采样的瞬时包络功率或幅度以及前一采样的包络功率或幅度的曲线，以准确地补偿功率放大器的调制包络存储器效应。 过去的功率或幅度提供了导致当前功率或幅度的功率或幅度的轨迹的指示，这使得预失真器能够更准确地补偿功率放大器失真。 预失真器LUT被更新为按照过去采样的功率或幅度以及当前采样的功率或幅度进行索引的值。
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公开(公告)号：US06253062B1
公开(公告)日：2001-06-26
申请号：US09167959
申请日：1998-10-06
IPC分类号： H04Q700
CPC分类号： H04W88/185 , H04W88/023
摘要： A system for distributing voice information service messages (VISMs) to subscribers through their voice pagers is provided with a voice information service workstation where VISMs are recorded, and a voice information service terminal which converts the VISMs into voice pages and transfers them into a voice paging network for distribution to subscribers' voice pagers. The system may be accessed by subscribers via telephone, computer, or voice pager for changing personal settings.
摘要翻译： 提供通过语音寻呼机向用户分发语音信息服务消息（VISM）的系统，其中记录有VISM的语音信息服务工作站，以及语音信息服务终端，其将VISM转换成语音页并将其传送到语音寻呼 用于分发给用户的语音寻呼机的网络。 用户可以通过电话，计算机或语音寻呼机来访问该系统，以改变个人设置。
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公开(公告)号：US5867065A
公开(公告)日：1999-02-02
申请号：US852390
申请日：1997-05-07
CPC分类号： H03F1/3247 , H03F2201/3224 , H03F2201/3233
摘要： A system for linearly transmitting an amplified output signal using predistortion is disclosed. The system uses a straight inverse modeling scheme to more easily and accurately determine the inverse of the distortion caused by a power amplifier of a RF transmitter. The direct inverse modeling scheme of the present invention indexes the LUT using the modulated input signals instead of the potentially noisier output signals, which helps to increase the accuracy of the predistortion. The predistorter system stores complex coefficients in the LUT, which are then used as the tap weights of a digital filter implementing the predistorter. Finally, the trainer uses a modified version of the power amplifier output signal. The modified power amplifier output signal has the in-band distortion removed from the power amplifier output signal.
摘要翻译： 公开了一种使用预失真线性地传输放大的输出信号的系统。 该系统使用直的逆建模方案更容易且准确地确定由RF发射机的功率放大器引起的失真的倒数。 本发明的直接逆建模方案使用调制输入信号而不是潜在的噪声输出信号对LUT进行索引，这有助于提高预失真的准确性。 预失真器系统存储LUT中的复数系数，然后将其用作实现预失真器的数字滤波器的抽头权重。 最后，培训师使用功率放大器输出信号的修改版本。 修正的功率放大器输出信号具有从功率放大器输出信号中去除的带内失真。
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公开(公告)号：US5732333A
公开(公告)日：1998-03-24
申请号：US601118
申请日：1996-02-14
申请人： Charles Brian Cox , David Kent Bonds , Jay Jui-Chieh Chen , Flaviu C. Costescu , Joel Richard Dierks , Wayne Douglas Duello , Thomas L. Frederick , Paul A. Goud , Derek Stephen Hilborn , Richard Johnathan Hinkle , Terry Lee Hinkle , David E. Jones , Theron Lee Jones , Patricia Fern Kavanagh , David W. Kroeger , Robert Richard Leyendecker , Vladimir Pavlovic , Claudio Gustavo Rey , Ray M.R. Sewlochan , Emre Tapucu , Mark A. Walker
发明人： Charles Brian Cox , David Kent Bonds , Jay Jui-Chieh Chen , Flaviu C. Costescu , Joel Richard Dierks , Wayne Douglas Duello , Thomas L. Frederick , Paul A. Goud , Derek Stephen Hilborn , Richard Johnathan Hinkle , Terry Lee Hinkle , David E. Jones , Theron Lee Jones , Patricia Fern Kavanagh , David W. Kroeger , Robert Richard Leyendecker , Vladimir Pavlovic , Claudio Gustavo Rey , Ray M.R. Sewlochan , Emre Tapucu , Mark A. Walker
CPC分类号： H03C3/406 , H03F1/3247 , H03F1/3294 , H03F2201/3233 , H04B2001/0425
摘要： A linear transmitter (101) using predistortion includes a modulator (103), a predistorter (107), a digital quadrature modulator (111), an upconverter (113), a power amplifier (115), and an antenna (117). In addition, the transmitter (101) has a feedback loop including a coupler (119), a downconverter (123), a digital quadrature demodulator (125), and a trainer (131). The digital data to be transmitted is provided into the modulator (103), which converts the digital data into in-phase and quadrature component signals. The in-phase and quadrature component signals are then provided to the predistorter (107), which "predistorts" the component signals prior to amplification. The digital quadrature modulator (111) converts the component signals into a single analog signal. The upconverter (113) upconverts this signal from the predistorter (107) into the desired frequency of transmission, which is provided to the power amplifier (115) and the antenna (117) for amplification and broadcast. The coupler (119) provides a portion of the amplified signal to the analog downconverter (123), which lowers the frequency of this signal to a range that is easily processed. The signal is then provided to the digital quadrature demodulator (125), which outputs the in-phase and quadrature component signals of the signal. These in-phase and quadrature component signals are provided to the trainer (131) which analyzes them with the output signals from the modulator. The trainer (131) compares these signals and updates the predistorter (107) so that the digital quadrature demodulator (125) output signals are substantially equivalent to the modulator (103) output signals.
摘要翻译： 使用预失真的线性发射机（101）包括调制器（103），预失真器（107），数字正交调制器（111），上变频器（113），功率放大器（115）和天线（117）。 另外，发射机（101）具有包括耦合器（119），下变频器（123），数字正交解调器（125）和训练器（131）的反馈回路。 要发送的数字数据被提供给调制器（103），其将数字数据转换成同相和正交分量信号。 然后将同相和正交分量信号提供给预失真器（107），其在放大之前“分段”分量信号。 数字正交调制器（111）将分量信号转换为单个模拟信号。 上变频器（113）将该信号从预失真器（107）上变频成期望的发送频率，其被提供给用于放大和广播的功率放大器（115）和天线（117）。 耦合器（119）将放大信号的一部分提供给模拟下变频器（123），这将该信号的频率降低到容易处理的范围。 然后将信号提供给数字正交解调器（125），其输出信号的同相和正交分量信号。 这些同相和正交分量信号被提供给训练器（131），其利用来自调制器的输出信号对它们进行分析。 训练器（131）比较这些信号并更新预失真器（107），使得数字正交解调器（125）输出信号基本上等于调制器（103）的输出信号。
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