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1. 发明授权

US5809090A Digital diversity receiver system 失效
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
IPC分类号： H04B7/08 , H04W84/02 , H04B7/02
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.

2. 发明授权

US5923712A Method and apparatus for linear transmission by direct inverse modeling 失效
标题翻译：通过直接逆模拟线性传输的方法和装置
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
IPC分类号： H03F1/32 , H04L25/49
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。

3. 发明授权

US06088407A Digital diversity receiver system 有权
标题翻译：数字分集接收机系统
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
IPC分类号： H04B7/08 , H04W84/02 , H04B7/02
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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