公开(公告)号：US06961368B2

公开(公告)日：2005-11-01

申请号：US09770804

申请日：2001-01-26

申请人： Paul W. Dent ,  Howard Eugene Holshouser ,  John Charles Phillips ,  Rod Dolman ,  Ron Boesch

发明人： Paul W. Dent ,  Howard Eugene Holshouser ,  John Charles Phillips ,  Rod Dolman ,  Ron Boesch

IPC分类号： H04B1/04 ,  H04B1/40 ,  H04L5/16 ,  H04L27/04 ,  H04L27/06

CPC分类号： H03F3/24 ,  H04B1/005 ,  H04B1/0057 ,  H04B1/0458 ,  H04B1/406

摘要： An adjustable matching network is provided for a wireless communications device transmitting and receiving signals in multiple frequency bands via an antenna. The adjustable matching network selectively connecting the antenna to a select power amplifier corresponding to a selected transmit frequency band and automatically matching the impedance of the antenna to the select power amplifier. The adjustable matching network also selectively connecting the antenna to a select bandpass filter corresponding to a selected receive frequency band and automatically matching the impedance of the antenna to the select bandpass filter.

摘要翻译： 为无线通信设备提供可调整的匹配网络，其经由天线在多个频带中发送和接收信号。 可调匹配网络将天线选择性地连接到对应于所选发射频带的选择功率放大器，并自动匹配天线与选择功率放大器的阻抗。 可调匹配网络还选择性地将天线连接到对应于所选接收频带的选择带通滤波器，并自动匹配天线与选择带通滤波器的阻抗。

公开(公告)号：US06944206B1

公开(公告)日：2005-09-13

申请号：US09718022

申请日：2000-11-20

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： H04L1/00 ,  H04B1/707

CPC分类号： H04L1/0057 ,  H04L1/0054 ,  H04L1/0059 ,  H04L1/0065 ,  H04L1/0069 ,  H04L1/0071

摘要： Methods and systems are provided for communicating encoded data. L received encoded signal values including soft information are received and transformed to L data symbols. In various embodiments, the L received encoded signal values are demodulated and the demodulated L received encoded signal values are convolutional decoded using a rate one convolutional decoder having only one output symbol per input symbol to provide the L data symbols, wherein the L received encoded signal values are convolutional encoded using a rate one convolutional encoder having only one output symbol per input symbol. In other embodiments of the present invention the L received encoded signal values are transformed using associated spectral energy at a plurality of frequency ranges within a bandwidth of a channel over which the L received encoded signal values are received for at least one of the L received encoded signal values.

摘要翻译： 提供了用于传达编码数据的方法和系统。 L接收到包括软信息的编码信号值被接收并变换成L个数据符号。 在各种实施例中，L个接收编码信号值被解调，并且解调的L个接收编码信号值被卷积解码，使用一个速率一个卷积解码器，每个输入符号只有一个输出符号，以提供L个数据符号，其中L个接收编码信号 值使用仅具有每个输入符号的一个输出符号的速率一卷积编码器进行卷积编码。 在本发明的其他实施例中，L个接收编码信号值被使用在频道的带宽内的多个频率范围内使用相关联的频谱能量进行变换，在该频带的带宽内，L个接收的编码信号值被接收到L个接收编码的信号中的至少一个 信号值。

公开(公告)号：US06690798B1

公开(公告)日：2004-02-10

申请号：US09005439

申请日：1997-12-10

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： H04K100

CPC分类号： H04M1/68 ,  H04B7/1855 ,  H04L9/0625 ,  H04L9/0872 ,  H04L9/0891 ,  H04L9/3271 ,  H04L2209/56 ,  H04L2209/80 ,  H04M1/72519 ,  H04W12/02 ,  H04W12/06 ,  H04W88/02

摘要： A method and apparatus is described for transforming a key variable used for scrambling mobile data traffic between a terminal and a network in alternate ways based on a value transmitted to the terminal from the network. Transformation is accomplished by passing portions of the key variable through a series of S-boxes, which provide a mapping between inputs and outputs. The method and apparatus is explained also in the context of a satellite communications system, in which a terminal can be located in a different continent/country from the terminal's home location. Enciphered communication is enabled between the foreign satellite gateway and the roaming terminal after the foreign gateway communicates with the terminal's native gateway. The native gateway transmits one or more cipher variables in the communication. Moreover, the value determining which way to cipher the data traffic can be based on numerous factors, including aspects of the satellite communication system.

摘要翻译： 描述了一种方法和装置，用于基于从网络发送到终端的值，以替代方式来变换用于在终端和网络之间加扰移动数据业务的密钥变量。 通过将关键变量的一部分通过一系列S盒来实现转换，这些S盒提供输入和输出之间的映射。 该方法和装置也在卫星通信系统的上下文中被解释，其中终端可以位于与终端的归属位置不同的大陆/国家。 在外部网关与终端的本地网关通信之后，外部卫星网关与漫游终端之间能够进行加密的通信。 本地网关在通信中传送一个或多个密码变量。 此外，确定哪种方式来加密数据业务的价值可以基于许多因素，包括卫星通信系统的各个方面。

公开(公告)号：US06625200B1

公开(公告)日：2003-09-23

申请号：US09236083

申请日：1999-01-25

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： H04L2730

CPC分类号： H04B1/70752 ,  H04B1/70735 ,  H04B1/708

摘要： Methods and systems for time synchronizing a receiver to a spread spectrum signal are described. Exemplary embodiments of the present invention provide for at least a two step process in which, at a first step, a number of candidate synchronization frequencies or timings are identified, followed by confirming one of the candidates as a correct synchronization state at a second or final step. According to the present invention, the confirmation step may be performed at the same time as the step of identifying further candidates by processing the same received signal samples in different ways.

摘要翻译： 描述了用于将接收机时间同步到扩频信号的方法和系统。 本发明的示例性实施例提供至少两步过程，其中在第一步骤中识别多个候选同步频率或定时，然后在第二或最后确认候选中的一个作为正确的同步状态 步。 根据本发明，可以通过以不同的方式处理相同的接收信号样本来识别其他候选的步骤的同时执行确认步骤。

公开(公告)号：US06567475B1

公开(公告)日：2003-05-20

申请号：US09222617

申请日：1998-12-29

申请人： Paul W. Dent ,  Rajaram Ramesh

发明人： Paul W. Dent ,  Rajaram Ramesh

IPC分类号： H04L100

CPC分类号： H04L27/186 ,  H04L27/0008

摘要： A method and system for the transmission, reception, and processing of 4-level and 8-level signaling symbols is provided. An inventive modulator is provided for modulating 4-level signaling symbols using an 8-level modulator. Further, this inventive modulator is able to produce 4-level modulation when modulating 4-level signaling symbols using an 8-level modulator, where the 4-level modulation represents the 4-level symbol sequence modulated. Further, a constrained/unconstrained demodulator is provided which is able to demodulate both 4-level signaling symbols and 8-level signaling symbols. The inventive demodulator accomplishes this by limiting the number of new symbol hypotheses and path histories to 4 when working with 4-level signaling symbols, and setting the number of new symbol hypotheses and path histories to 8 when working with 8-level signaling symbols. Additionally, an error correction decoder is provided which is also able to decode a demodulated signal which contains both 4-level and 8-level signaling symbols. The inventive error correction decoder accomplishes this by utilizing an interleaver that only places bits in the 2-bit positions of the 3-PSK soft values that correspond to the 2-bits of QPSK to decode 4-level signalling symbols, and utilizing an interleaver that places bits in all three of the possible bit positions of a symbol to decode 8-level signalling symbols.

摘要翻译： 提供了用于发送，接收和处理4级和8级信令符号的方法和系统。 提供了一种创造性调制器用于使用8电平调制器调制4电平信令符号。 此外，本发明的调制器能够在使用8电平调制器调制4电平信令符号时产生4电平调制，其中4电平调制表示4电平符号序列调制。 此外，提供了一种能够对4级信令符号和8级信令符号进行解调的约束/非约束解调器。 本发明的解调器通过在使用4级信令符号时将新的符号假设和路径历史的数量限制为4，并且在使用8级信令符号时将新的符号假设和路径历史的数量设置为8来实现。 此外，提供了一种纠错解码器，它还能够对包含4电平和8电平信号符号的解调信号进行解码。 本发明的纠错解码器通过利用仅将3-PSK软值的2位位置的位对应于QPSK的2位来解码4级信令符号的交织器来实现，并利用交织器 将位置在符号的所有三个可能位位置中，以解码8电平信令符号。

公开(公告)号：US06526279B1

公开(公告)日：2003-02-25

申请号：US09372552

申请日：1999-08-11

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： H04Q720

CPC分类号： H04W36/0066 ,  H04W36/0083 ,  H04W88/06

摘要： Communication systems and methods are provided allowing a single mode mobile terminal to support mobile assisted signal strength measurement operations in both a fixed frequency reuse based communication network and an adaptive channel allocation based communication network. Candidate base station signal strength measurements are requested by a fixed frequency reuse type network, measured by the mobile terminal and provided to the fixed frequency reuse type network which is seeking to identify a strongest signal for mobile assisted handover operations. In addition, interference signal strength measurements are requested by an adaptive channel allocation type network, measured by the mobile terminal and provided to the adaptive channel allocation type network by the mobile terminal. No redundant circuitry is required in the mobile terminal. Instead, the mobile terminal executes the same operations using the same hardware regardless of whether the requested measurement is of a candidate signal strength or an interference signal.

摘要翻译： 提供了通信系统和方法，允许单模移动终端在基于固定频率复用的通信网络和基于自适应信道分配的通信网络中支持移动辅助信号强度测量操作。 候选基站信号强度测量由固定频率复用型网络请求，由移动终端测量并提供给正在寻求识别用于移动辅助切换操作的最强信号的固定频率复用型网络。 此外，由移动终端测量并由移动终端提供给自适应信道分配型网络的自适应信道分配型网络请求干扰信号强度测量。 在移动终端中不需要冗余电路。 相反，移动终端使用相同的硬件执行相同的操作，而不管请求的测量是否是候选信号强度或干扰信号。

公开(公告)号：US06484285B1

公开(公告)日：2002-11-19

申请号：US09499600

申请日：2000-02-07

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： H03M1300

CPC分类号： H03M13/6516 ,  H03M13/35 ,  H03M13/39 ,  H03M13/413

摘要： An apparatus and method decode information signals which have been encoded using a tailbiting error-correction codeword. The method generally includes the steps of initializing a number of decoder states corresponding to all possible starting states of the encoder to have equal associated likelihood metrics. The metrics are updated to reflect a likelihood metric for each of the decoder states given the received information signals. Further information signals, representative of further coded symbols, are received and a decoder state having the highest associated likelihood metric is extended by updating the likelihood metric to produce new likelihood metrics for each possible hypothesized extended decoded information symbol, given the further received information signals. An assumed value for the extended decoder information symbol is appended to the symbol history for the extended decoder state. The method continues to receive further information signals and to extend the decoder state having the highest likelihood metric by hypothesizing additional information symbols to produce extended decoder states until a last information symbol coded in the tailbiting codeword has been hypothesized. Final metrics are computed for each of the corresponding extended decoder states and if one of the final metrics is indicative of the highest likelihood metric, then the symbol history of the associated decoder state is used as the decoded information.

摘要翻译： 一种装置和方法对已经使用尾部纠错码字编码的信息信号进行解码。 该方法通常包括以下步骤：将与编码器的所有可能的起始状态相对应的多个解码器状态初始化以具有相等的相关似然度量。 在给定接收到的信息信号的情况下，更新度量以反映每个解码器状态的似然度量。 接收另外的编码符号的进一步的信息信号，并且通过更新似然度量来扩展具有最高相关似然度量的解码器状态，以产生每个可能的假设的扩展解码信息符号的新似然度量，给出进一步接收的信息信号。 扩展解码器信息符号的假设值被附加到用于扩展解码器状态的符号历史。 该方法继续接收另外的信息信号，并且通过假设附加信息符号来扩展具有最高似然度量的解码器状态以产生扩展解码器状态，直到已经假设在尾部码字中编码的最后一个信息符号。 对于每个对应的扩展解码器状态计算最终度量，并且如果最终度量中的一个指示最高似然度量，则将相关联的解码器状态的符号历史用作解码信息。

公开(公告)号：US06404821B1

公开(公告)日：2002-06-11

申请号：US09232848

申请日：1999-01-19

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： H04B702

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。

公开(公告)号：US06320914B1

公开(公告)日：2001-11-20

申请号：US08769263

申请日：1996-12-18

申请人： Paul W. Dent

发明人： Paul W. Dent

IPC分类号： H04L2712

CPC分类号： H04L27/18

摘要： A method and apparatus for predicting signal values for signals that have not yet been received wherein the information stream transmitted has been divided into a first stream and a second stream. A first Q component is predicted based on values stored in a state memory for the first bit stream. A first I component is predicted using the first predicted Q component and a previous bit from the state memory for the first bit stream. Then, a second Q component is predicted based on values in the state memory for the second bit stream. A second I component is then predicted using the second predicting Q component and the previous bit from the second bit stream. The first I component and the second Q component are added to obtain a combined I value and the first Q component and the second I component are added to obtain a combined Q value. Finally, the combined I value, the combined Q value, and a channel coefficient inputted into a complex multiplier, wherein the complex multiplier outputs a signal predicting value.

摘要翻译： 一种用于预测尚未被接收的信号的信号值的方法和装置，其中发送的信息流已被划分为第一流和第二流。 基于存储在第一位流的状态存储器中的值来预测第一Q分量。 使用来自第一比特流的状态存储器的第一预测Q分量和先前比特来预测第一I分量。 然后，基于第二比特流的状态存储器中的值来预测第二Q分量。 然后使用第二预测Q分量和来自第二比特流的先前比特来预测第二I分量。 添加第一I分量和第二Q分量以获得组合的I值，并且添加第一Q分量和第二I分量以获得组合的Q值。 最后，组合I值，组合Q值和输入到复数乘法器中的信道系数，其中复数乘法器输出信号预测值。

公开(公告)号：US06314081B1

公开(公告)日：2001-11-06

申请号：US08588507

申请日：1996-01-18

申请人： Sandeep Chennakeshu ,  Nils Rydbeck ,  Amer A. Hassan ,  Paul W. Dent

发明人： Sandeep Chennakeshu ,  Nils Rydbeck ,  Amer A. Hassan ,  Paul W. Dent

IPC分类号： H04J1100

CPC分类号： H04W4/14 ,  H04B7/18567

摘要： A communication system and method for transmitting relatively short data messages in the communication system. A dedicated frequency is sequentially switched into each of a plurality of satellite beams or traffic channels to transmit data messages at an increased power level to provide an increased signal margin. The increased power level of the dedicated frequency can be combined with coding and bit and message repetition to further increase the signal margin.

摘要翻译： 一种用于在通信系统中发送相对短的数据消息的通信系统和方法。 专用频率被顺序地切换到多个卫星波束或业务信道中的每一个以在增加的功率电平上发送数据消息以提供增加的信号余量。 专用频率的增加的功率电平可以与编码和比特和消息重复组合以进一步增加信号余量。