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公开(公告)号：US5592556A
公开(公告)日：1997-01-07
申请号：US287812
申请日：1994-08-09
申请人： Daniel I. Schwed
发明人： Daniel I. Schwed
CPC分类号： H04K1/00
摘要： A new digital radio includes codec, vocoder and encryption/decryption processing all on a single integrated circuit chip module. Great flexibility is provided in terms of different operating modes (e.g., encrypt/decrypt only, vocode only, or encrypt/decrypt and vocode). Radio control processor overhead is reduced substantially, because the radio control processor does not need to transfer data between codec, vocoder and encryption/decryption processes and/or components. An internal executive routine within the module handles all vocoder and encryption command and data processing. A special synchronization scheme is provided to synchronize the transceiver modem rate with the speech processing rate. The single-chip speech processing module is sufficiently flexible to allow users to define, write, load and use their own encryption/decryption routines without requiring a new masked ROM.
摘要翻译： 一个新的数字无线电包括编解码器，声码器和加密/解密处理都在单个集成电路芯片模块上。 根据不同的操作模式（例如，仅加密/解密，仅声码，或加密/解密和声码）提供了很大的灵活性。 由于无线电控制处理器不需要在编解码器，声码器和加密/解密处理和/或组件之间传送数据，所以无线电控制处理器的开销大幅降低。 该模块内部的执行程序处理所有声码器和加密命令和数据处理。 提供了一种特殊的同步方案来使收发机调制解调器速率与语音处理速率同步。 单芯片语音处理模块足够灵活以允许用户定义，写入，加载和使用自己的加密/解密程序，而不需要新的掩蔽ROM。
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公开(公告)号：US5574967A
公开(公告)日：1996-11-12
申请号：US179947
申请日：1994-01-11
申请人： Paul W. Dent , Ross W. Lampe
发明人： Paul W. Dent , Ross W. Lampe
CPC分类号： H04B1/1607 , H03F1/0294 , H03F1/3229 , H03F1/3252 , H03F3/602 , H04B1/0483 , H04B1/52 , H04B1/04 , H04B2001/0433
摘要： An amplifying apparatus for linearly amplifying a desired signal using a pair of coupled non-linear amplifiers is disclosed. The amplifying apparatus comprises a limiter for separating amplitude variations from the desired signal and producing a constant amplitude signal bearing the phase of the desired signal and an amplitude related signal. In addition, a drive signal generater produces two drive signals each dependent on the constant amplitude signal and the amplitude related signal such that each drive signal depends on the phase of the desired signal and such that the sum of the squares of the amplitudes of the drive signals is constant. Finally, a coupler couples the two drive signals to produce two constant amplitude signals for driving the pair of non-linear power amplifiers and for coupling the outputs of the power amplifiers to produce two amplified output signals, one of which is the linearly amplified desired signal and the other of which is a waste energy signal.
摘要翻译： 公开了一种使用一对耦合的非线性放大器线性放大所需信号的放大装置。 放大装置包括用于将振幅变化与期望信号分离并产生承载所需信号和振幅相关信号的相位的恒定振幅信号的限幅器。 此外，驱动信号发生器产生两个驱动信号，每个驱动信号依赖于恒定幅度信号和振幅相关信号，使得每个驱动信号取决于期望信号的相位，并且使得驱动器的振幅的平方和之和 信号是恒定的。 最后，耦合器将两个驱动信号耦合以产生两个恒定幅度信号，用于驱动一对非线性功率放大器并耦合功率放大器的输出以产生两个放大的输出信号，其中之一是线性放大的期望信号 另一个是废能信号。
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公开(公告)号：US5557645A
公开(公告)日：1996-09-17
申请号：US305727
申请日：1994-09-14
申请人： Paul W. Dent
发明人： Paul W. Dent
CPC分类号： H04L25/03203
摘要： A demodulator for demodulating a signal modulated with digital information symbols so as to extract the information symbols is disclosed. A receiver receives a signal over a communications channel and samplers and digitizers produce a sequence of numerical sample values representative of the received signal. Memories are provided each having a number of state memories each associated with a hypothesized symbol string. A controller selectively retrieves values from the memory means and controls the timing of operations thereupon. A metric computer computes candidate metrics using a hypothesis of a next of the information symbols to be demodulated made by the controller, one of the numerical sample values, path metric values, B-matrices, and U-vectors and the candidate metrics associated state number selected by the controller from the memory means. A best predecessor computer determines the best of the candidate metrics to be selected to be written back into the memory means along with a successor B-matrix, U-vector and path history. The successor B-matrices, U-vectors and path history are then updated using corresponding values associated with the best predecessor and one of numerical sample values.
摘要翻译： 公开了一种用于解调用数字信息符号调制的信号以便提取信息符号的解调器。 接收机通过通信信道接收信号，采样器和数字转换器产生代表接收信号的数字采样值序列。 提供各自具有每个与假设符号串相关联的多个状态存储器的存储器。 控制器选择性地从存储装置检索值并控制其上的操作的定时。 度量计算机使用由控制器进行解调的下一个信息符号的假设来计算候选度量，数值样本值，路径度量值，B矩阵和U向量之一以及候选度量相关联的状态数 由控制器从存储装置中选择。 最好的前身计算机确定要被选择被写回到存储器装置中的最佳候选度量以及后继B矩阵，U向量和路径历史。 然后使用与最佳前辈和数值样本值之一相关联的对应值来更新后继B矩阵，U向量和路径历史。
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公开(公告)号：US5530929A
公开(公告)日：1996-06-25
申请号：US303183
申请日：1994-09-08
申请人： Bjorn Lindqvist , Martin Isberg
发明人： Bjorn Lindqvist , Martin Isberg
CPC分类号： H03D1/2245 , H04B1/30
摘要： A method and a device in a homodyne receiver including a local oscillator generating an oscillator signal at a frequency of f.sub.LO, a mixer, and a reception device for receiving an input signal having a frequency of f.sub.RF, the oscillator signal and the input signal being supplied to the mixer. The oscillator signal is supplied to a first processing unit to produce a first output signal having a frequency of M*f.sub.LO, where M is an integer value. The first output signal is supplied to a second processing unit to produce a second output signal having a frequency of M*f.sub.LO /N=f.sub.LO, where N is an integer number and M.noteq.N, and the mixer and the second processing unit are integrated to minimize leakage of signals being supplied to the mixer from the second processing unit.
摘要翻译： 一种在零差接收机中的方法和装置，包括以fLO频率产生振荡器信号的本地振荡器，混频器和用于接收具有fRF频率的输入信号的接收装置，提供振荡器信号和输入信号 到搅拌机。 振荡器信号被提供给第一处理单元以产生具有M * fLO频率的第一输出信号，其中M是整数值。 第一输出信号被提供给第二处理单元以产生频率为M * fLO / N = fLO的第二输出信号，其中N是整数和M NOTEQUAL N，并且混频器和第二处理单元被集成 以最小化从第二处理单元提供给混合器的信号的泄漏。
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5.发明授权System for correlating RF usage in a trunked communication network based on channel assignments and channel drops for each call 失效用于基于每个呼叫的信道分配和信道丢弃来相关于集群通信网络中的RF使用的系统
公开(公告)号：US5483575A
公开(公告)日：1996-01-09
申请号：US20075
申请日：1993-02-19
摘要： A system and method are disclosed for correlating rf communications in a multi-site, trunked rf communication system which includes a plurality of site controllers for controlling radio unit rf communications in corresponding geographical site areas and at least one multi-site coordinator for monitoring messages from each site controller and establishing and removing rf communication channels. Information from the multi-site coordinator including channel assignments and channel drops generated for each communication originated from or received by each radio unit is obtained from the multi-site coordinator. RF communication resources used by each radio unit are then correlated and used to generate bills detailing for each radio unit specific instances and types of rf communication resources used.
摘要翻译： 公开了一种用于将多站点中继rf通信系统中的rf通信相关联的系统和方法，其包括用于控制相应地理站点区域中的无线电单元rf通信的多个站点控制器和用于监视来自 每个站点控制器和建立和删除rf通信通道。 从多站点协调器获得来自多站点协调器的信息，包括由每个无线电单元发起或接收的每个通信生成的信道分配和信道丢弃。 然后将每个无线电单元使用的RF通信资源相关联并用于生成针对每个无线电单元的特定实例和使用的rf通信资源的类型的票据。
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公开(公告)号：US5444868A
公开(公告)日：1995-08-22
申请号：US36206
申请日：1993-03-23
CPC分类号： H04B1/3822 , H04B2001/3894
摘要： The mobile radio system includes a plurality of power amplifier modules having discrete power levels, a common transceiver module and a plurality of control head modules having different control functions. Selected ones of the power amplifiers and control heads are electrically and mechanically coupled to opposite ends of the transceiver. In one form, the control head may be remotely mounted and electrically coupled to the selected power amplifier. A common bracket is used to mount a radio having selected ones of the power amplifiers coupled to the transceiver with a selected control head. In a further embodiment, a receptacle having electrical fittings at its rear end and an opening at its opposite end receives the radio through its open end with the electrical connections being automatically coupled to one another upon final seating of the radio in the receptacle. The radio includes a handle which forms a latch for releasably securing the radio in the receptacle.
摘要翻译： 移动无线电系统包括具有离散功率电平的多个功率放大器模块，公共收发器模块和具有不同控制功能的多个控制头模块。 功率放大器和控制头中的所选择的电和机械耦合到收发器的相对端。 在一种形式中，控制头可以被远程安装并且电耦合到所选择的功率放大器。 通常的支架用于安装具有与所选择的控制头耦合到收发器的功率放大器的选定功率放大器的无线电设备。 在另一实施例中，在其后端具有电气配件的插座和其相对端的开口通过其开放端接收无线电装置，其中电连接器在最终将无线电放置在插座中时自动地彼此耦合。 收音机包括形成用于将收音机可释放地固定在插座中的闩锁的把手。
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公开(公告)号：US5423074A
公开(公告)日：1995-06-06
申请号：US225709
申请日：1994-04-11
申请人： Paul W. Dent
发明人： Paul W. Dent
CPC分类号： H03H7/38 , H03F1/56 , H04B1/0458
摘要： A power amplifier used in a portable, radio frequency transmitter is switched between different modes of operation when transmitting differently modulated carriers. The first mode of operation corresponds to amplitude modulation (AM), while a second mode corresponds to angle modulation techniques such as frequency modulation (FM). A switching network alters the impedance of the power amplifier to match network for matching the impedance of the transmitter antenna in order to achieve maximum efficiency in each mode of operation. Various switching methods and impedance matching circuits are disclosed.
摘要翻译： 用于便携式射频发射机的功率放大器在传输不同调制载波时在不同操作模式之间切换。 第一操作模式对应于幅度调制（AM），而第二模式对应于诸如频率调制（FM）的角度调制技术。 交换网络改变功率放大器的阻抗以匹配网络以匹配发射机天线的阻抗，以便在每种操作模式中实现最大效率。 公开了各种开关方法和阻抗匹配电路。
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8.发明授权Method and apparatus for controlling RF spectral splatter into adjacent channels when activating an RF transmitter 失效在激活RF发射器时，将RF频谱飞溅控制到相邻信道中的方法和装置
公开(公告)号：US5406227A
公开(公告)日：1995-04-11
申请号：US113096
申请日：1993-08-30
申请人： James W. Williams
发明人： James W. Williams
CPC分类号： H03G3/3042
摘要： A simple and effective "RF snubber" circuit resolves the problems associated with transient spectral noise caused by radio transmitter activation in nearby channels. By connecting an RF snubber circuit in parallel with the RF amplifier output, the rise time or turn-on characteristic of the RF signal generated by the transmitter is controlled. As a result, adjacent channel interference is substantially eliminated.
摘要翻译： 简单而有效的“RF缓冲”电路解决了由附近信道中无线电发射机激活引起的瞬态频谱噪声相关的问题。 通过将RF缓冲电路与RF放大器输出并联连接，控制发射机产生的RF信号的上升时间或导通特性。 结果，基本上消除了相邻信道干扰。
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公开(公告)号：US5404376A
公开(公告)日：1995-04-04
申请号：US118179
申请日：1993-09-09
申请人： Paul W. Dent
发明人： Paul W. Dent
CPC分类号： H04W52/283 , H04W52/282 , H04W64/00 , H04W52/223 , H04W52/226
摘要： In a mobile radio telephone system employing TDMA or CDMA, mobile units often must determine the timing and appropriate power necessary for transmissions to a base station. Information broadcast by base stations allows the mobile station to approximate its distance from each base station based on an average signal strength received and thereby determine the coarse sector location. Broadcast information may include the mean radial distribution of signal strength versus distance. From the broadcast information, the mobile station determines the propagation loss for a transmission to the base station and the appropriate power level and timing for transmissions. Accordingly, the mobile station transmits signals to the base station at the determined signal timing and power level.
摘要翻译： 在采用TDMA或CDMA的移动无线电话系统中，移动单元通常必须确定向基站传输所需的定时和适当的功率。 由基站广播的信息允许移动台基于接收到的平均信号强度来近似来自每个基站的距离，从而确定粗略的扇区位置。 广播信息可以包括信号强度对距离的平均径向分布。 从广播信息中，移动台确定到基站的传输的传播损耗以及用于传输的适当功率电平和定时。 因此，移动台以确定的信号定时和功率电平向基站发送信号。
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公开(公告)号：USD356316S
公开(公告)日：1995-03-14
申请号：US6175
申请日：1993-03-23
申请人： Richard Culbertson
设计人： Richard Culbertson
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