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公开(公告)号：US06308048B1
公开(公告)日：2001-10-23
申请号：US08974227
申请日：1997-11-19
申请人： Charles Gore , Rodney A. Dolman , Paul W. Dent
发明人： Charles Gore , Rodney A. Dolman , Paul W. Dent
IPC分类号： H04B140
CPC分类号： H04B1/0057 , H03D7/163 , H04B1/005 , H04B1/006 , H04B1/405
摘要： A mobile radio telephone having a simplified architecture including a reduced number of integrated circuits and a reduced number of RF connections. A dual band, dual mode mobile phone can be constructed using either a single crystal reference oscillator or two crystals such that alternative symbol rates, channel spacings, or transmit/receive duplex spacings can be achieved.
摘要翻译： 具有简化架构的移动无线电话，其包括减少数量的集成电路和减少数量的RF连接。 双频双模移动电话可以使用单晶参考振荡器或两个晶体构造，以便可以实现替代符号速率，信道间隔或发送/接收双工间隔。
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公开(公告)号：US06181199B2
公开(公告)日：2001-01-30
申请号：US09226478
申请日：1999-01-07
IPC分类号： H03F338
CPC分类号： H03F1/3241 , H03C3/38 , H03F2200/331 , H04L27/362 , H04L27/367
摘要： Power IQ modulation systems and methods include first and second power amplifiers, each including a signal input, a supply input and a power input. The first and second power amplifiers are preferably class-C power amplifiers. A source of first, second, third and fourth reference frequency signals is also provided. The first and second reference frequency signals are inverted relative to one another, and the third and fourth reference frequency signals are inverted relative to one another. Preferably, the first, second, third and fourth reference frequency signals are 0°, 180°, 90° and 270° phase shifted reference frequency signals, respectively. A switching system is also provided that selectively applies one of the first and second reference frequency signals to the signal input of the first power amplifier as a function of the polarity of one of the I and Q input signals. The switching system also selectively applies one of the third and fourth reference frequency signals to the signal input of the second power amplifier as a function of the polarity of the other of the I and Q input signals. A third amplifier, preferably a class-D amplifier, is responsive to the one of the I and Q input signals to supply a first variable supply voltage to the supply input of the first amplifier. A fourth amplifier, also preferably a class-D amplifier, is responsive to the other of I and Q input signals to supply a second variable supply voltage to the supply input of the second amplifier. A coupler couples the power outputs of the first and second power amplifiers to a load such as a radiotelephone antenna. Accordingly, power IQ modulation is provided that can use class-C and class-D amplifiers that are highly efficient.
摘要翻译： 功率IQ调制系统和方法包括第一和第二功率放大器，每个功率放大器包括信号输入，电源输入和功率输入。 第一和第二功率放大器优选为C类功率放大器。 还提供了第一，第二，第三和第四参考频率信号的源。 第一和第二参考频率信号相对于彼此反转，并且第三和第四参考频率信号相对于彼此反转。 优选地，第一，第二，第三和第四参考频率信号分别为0°，180°，90°和270°相移参考频率信号。 还提供一种切换系统，其选择性地将第一和第二参考频率信号中的一个作为I和Q输入信号之一的极性的函数施加到第一功率放大器的信号输入。 开关系统还根据I和Q输入信号中的另一个的极性，选择性地将第三和第四参考频率信号中的一个施加到第二功率放大器的信号输入。 第三放大器，优选D类放大器，响应于I和Q输入信号之一，以向第一放大器的电源输入端提供第一可变电源电压。 第四放大器，优选地是D类放大器，响应于I和Q输入信号中的另一个，以向第二放大器的电源输入端提供第二可变电源电压。 耦合器将第一和第二功率放大器的功率输出耦合到诸如无线电话天线之类的负载。 因此，提供了可以使用高效率的C类和D类放大器的功率IQ调制。
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公开(公告)号：US6167553A
公开(公告)日：2000-12-26
申请号：US135613
申请日：1998-08-18
申请人： Paul W. Dent
发明人： Paul W. Dent
CPC分类号： H04L9/0668 , H04L2209/34
摘要： A system and a method for transforming an N-bit input value into a transformed N-bit output value which may be used for error correction coding or ciphering of the N-bit input value. In a representative embodiment, the system comprises means for providing a set of all possible N-bit values as a plurality of mutually exclusive subsets each containing at least one possible N-bit value; means for comparing the N-bit input value with each of the subsets to determine to which one of the subsets the N-bit input value belongs; and means for selecting as the transformed N-bit output value an N-bit value from another one of the subsets. In accordance with the present invention, each of these subsets may be cyclically generated in a linear feedback shift register (LFSR) or, alternatively, stored in a memory.
摘要翻译： 一种用于将N位输入值变换为可用于N位输入值的纠错编码或加密的经变换的N位输出值的系统和方法。 在代表性实施例中，系统包括用于提供一组全部可能N位值作为多个互斥子集的装置，每个子集包含至少一个可能的N位值; 用于将N位输入值与每个子集进行比较以确定N位输入值属于哪个子集的装置; 以及用于从所述子集中的另一个选择N位值作为变换的N位输出值的装置。 根据本发明，这些子集中的每一个可以在线性反馈移位寄存器（LFSR）中循环生成，或者替代地存储在存储器中。
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24.发明授权
公开(公告)号：US6091303A
公开(公告)日：2000-07-18
申请号：US286857
申请日：1999-04-06
申请人： Paul W. Dent
发明人： Paul W. Dent
IPC分类号： H03L7/22 , H03C3/09 , H03C5/00 , H03L7/087 , H03L7/23 , H04B1/04 , H04L27/20 , H03C1/00 , H03C3/00 , H03L7/07 , H03L7/16 , H04L27/00
CPC分类号： H03C3/0966 , H03C5/00 , H03L7/0805 , H03L7/23 , H04L27/2014
摘要： A circuit for reducing phase noise in a transmitted radio signal includes a first phase-locked loop circuit including a first controlled oscillator generating a first output signal at a first desired frequency, and a first phase comparator developing a first phase error signal to control the first controlled oscillator, the first error signal representative of phase differences between the first output signal and the first desired frequency. A second phase-locked loop circuit includes a second controlled oscillator generating a second output signal at a desired frequency of transmission related to the first desired frequency, and a second phase comparator developing a second phase error signal representative of phase differences between the first output signal and the desired frequency of transmission. A summer combines the first and second error signals to control the second controlled oscillator to thereby reduce, or cancel, phase noise generated by the first controlled oscillator in the second output signal transmitted as a radio signal at the desired frequency of transmission.
摘要翻译： 用于减少所发送的无线电信号中的相位噪声的电路包括第一锁相环电路，其包括产生第一期望频率的第一输出信号的第一受控振荡器，和形成第一相位误差信号以控制第一相位误差信号的第一相位比较器 控制振荡器，第一误差信号表示第一输出信号和第一期望频率之间的相位差。 第二锁相环电路包括第二受控振荡器，以与所述第一期望频率相关的期望的传输频率产生第二输出信号，以及第二相位比较器，产生表示所述第一输出信号之间的相位差的第二相位误差信号 和所需的传输频率。 夏天组合第一和第二误差信号以控制第二受控振荡器，从而减少或消除由作为无线电信号以期望的传输频率发送的第二输出信号中的第一受控振荡器产生的相位噪声。
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公开(公告)号：US5940431A
公开(公告)日：1999-08-17
申请号：US771692
申请日：1996-12-23
申请人： Jacobus C. Haartsen , Paul W. Dent
发明人： Jacobus C. Haartsen , Paul W. Dent
CPC分类号： H04W52/0216
摘要： Establishing a connection between a paging unit and a standby unit in a channel hopping communications system includes activating the standby unit for an activation time period out of every standby time period. During each activation time period, the standby unit monitors a selected channel for receipt of a paging message. The selected channel is selected from a plurality of channels, and, for each subsequent activation time period, the selected channel is a subsequent one of the plurality of channels as specified by a hopping sequence and an internal clock. A page train is repeatedly transmitted from the paging unit to the standby unit, until a response is received from the standby unit. Each page train includes a plurality of paging messages, each paging message being transmitted on a different one of a subset of the plurality of channels. Selection of a page train for transmission by the paging unit may be based on an estimate of the standby unit's internal clock.
摘要翻译： 在频道跳频通信系统中建立寻呼单元和备用单元之间的连接包括在每个待机时间段内激活待机单元的激活时间段。 在每个激活时段期间，待机单元监视所选择的频道以接收寻呼消息。 所选择的信道是从多个信道中选择的，并且对于每个随后的激活时间段，所选择的信道是由跳频序列和内部时钟指定的多个信道中的后续的信道。 页面列表从寻呼单元重复发送到备用单元，直到从备用单元接收到响应。 每个列车包括多个寻呼消息，每个寻呼消息在多个信道的子集中的不同的一个上发送。 通过寻呼单元进行传输的页面列表的选择可以基于待机单元的内部时钟的估计。
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公开(公告)号：US5933766A
公开(公告)日：1999-08-03
申请号：US764877
申请日：1996-12-16
申请人： Paul W. Dent
发明人： Paul W. Dent
CPC分类号： H03F1/3223
摘要： A multi-channel transmit amplifier array comprising a multiplicity N of coupled power amplifier elements is disclosed. The number of channels provided for amplifying desired signals for transmission is less than N, by at least one. In this case, the unused channel is used to inject an intermodulation compensation waveform specifically tailored to reduce intermodulation generated in all of the other N-1 signal paths. Instantaneous complex waveform values for the intermodulation compensation waveform may be systematically computed from the instantaneous complex values of the N-1 desired signals in such a way as to minimize the greatest signal amplitude in any of the N signal paths.
摘要翻译： 公开了一种包括耦合功率放大器元件的多个N的多通道发射放大器阵列。 提供用于放大所需传输信号的信道数目小于N，至少为1。 在这种情况下，未使用的信道用于注入专门用于减少在所有其它N-1信号路径中产生的互调的互调补偿波形。 用于互调补偿波形的瞬时复波形值可以以N-1个期望信号的瞬时复数值以这样一种方式从N个信号路径中的任何一个中最小化最大信号幅度的方式被系统计算。
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27.发明授权Efficient apparatus for simultaneous modulation and digital beamforming for an antenna array 失效用于天线阵列的同时调制和数字波束成形的高效装置
公开(公告)号：US5909460A
公开(公告)日：1999-06-01
申请号：US568664
申请日：1995-12-07
申请人： Paul W. Dent
发明人： Paul W. Dent
CPC分类号： H01Q3/26
摘要： A digital beamforming network for transmitting a first number of digital information signal using a second number of antenna array elements is disclosed. Assemblers are used for assembling one information bit selected from each of the information signals into a bit vector. Digital processors have an input for the bit vector and a number of outputs equal to the second number of antenna elements and process the bit vector. Finally, modulation waveform generators coupled to each of the second number of outputs generate a signal for transmission by each antenna element.
摘要翻译： 公开了一种数字波束形成网络，用于使用第二数量的天线阵列元件发射第一数字信号信号。 汇编器用于将从每个信息信号中选择的一个信息位组合成位向量。 数字处理器具有用于位向量的输入和等于第二数量的天线元件的输出数量并处理位向量。 最后，耦合到第二数量的输出中的每一个的调制波形发生器产生用于由每个天线元件传输的信号。
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28.发明授权Synchronization method, and associated circuitry, for synchronizing a receiver with a transmitter 失效同步方法和相关电路，用于使接收机与发射机同步
公开(公告)号：US5883929A
公开(公告)日：1999-03-16
申请号：US626807
申请日：1996-04-03
CPC分类号： H04L7/046 , H04J3/0608
摘要： A synchronization method and apparatus for synchronizing a receiver, such as a radiotelephone operable in a cellular communication system with a transmitter. Synchronization sequences are transmitted as parts of a control signal to the receiver. The synchronization sequences are formed of either a dotting sequence or a set of m-sequences. Such synchronization sequences are of high margins and also permit synchronization of the user terminal responsive to a reduced number of calculations.
摘要翻译： 一种用于使诸如在蜂窝通信系统中可操作的无线电话机的接收机与发射机同步的同步方法和装置。 同步序列作为控制信号的一部分被发送到接收机。 同步序列由点序列或一组m序列组成。 这样的同步序列具有高边距并且还允许响应于减少的计算数量来同步用户终端。
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公开(公告)号：US5862173A
公开(公告)日：1999-01-19
申请号：US570431
申请日：1995-12-11
申请人： Paul W. Dent
发明人： Paul W. Dent
CPC分类号： H04B1/7107 , H04J13/00 , H04B1/7101
摘要： A method and receiver which provides, among other features, for resubtraction of an already subtracted signal in order to eliminate subtraction errors, termed re-orthogonalization, is described herein. According to exemplary embodiments, pairwise combinations of spreading codes are used to despread received composite signals. For example, these pairwise combinations can include a first spreading code associated with a signal that has already been subtracted and a second spreading code associated with a signal which is weaker than that associated with the first spreading code. In this way both resubtraction and subtraction are performed at the same time.
摘要翻译： 在此描述了一种方法和接收机，其中提供了用于重新抽取已经减去的信号以便消除称为重新正交化的减法误差的其它特征。 根据示例性实施例，扩展码的成对组合用于对接收到的复合信号进行解扩。 例如，这些成对组合可以包括与已经被减去的信号相关联的第一扩展码和与比第一扩展码相关联的信号弱的信号相关联的第二扩展码。 以这种方式，同时执行重新抽取和减法。
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公开(公告)号：US5844925A
公开(公告)日：1998-12-01
申请号：US682330
申请日：1996-07-17
申请人： Paul W. Dent
发明人： Paul W. Dent
CPC分类号： H04L9/0668 , H04L2209/34
摘要： A system and a method for transforming an N-bit input value into a transformed N-bit output value which may be used for error correction coding or ciphering of the N-bit input value. In a representative embodiment, the system comprises means for providing a set of all possible N-bit values as a plurality of mutually exclusive subsets each containing at least one possible N-bit value; means for comparing the N-bit input value with each of the subsets to determine to which one of the subsets the N-bit input value belongs; and means for selecting as the transformed N-bit output value an N-bit value from another one of the subsets. In accordance with the present invention, each of these subsets may be cyclically generated in a linear feedback shift register (LFSR) or, alternatively, stored in a memory.
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