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11. 发明授权

US08565324B2 Communications device using measured signal-to-noise ratio to adjust phase and frequency tracking 失效
标题翻译：通信设备使用测量的信噪比来调整相位和频率跟踪
公开(公告)号：US08565324B2
公开(公告)日：2013-10-22
申请号：US12211995
申请日：2008-09-17
申请人： William N. Furman , John W. Nieto , William L. Tyler
发明人： William N. Furman , John W. Nieto , William L. Tyler
IPC分类号： H04K1/10 , H03D1/00 , H04J3/06
CPC分类号： H04L27/0014 , H03J7/02 , H04L2027/0069
摘要： A communications device includes a phase and frequency tracking loop having a signal input and adjustable loop filter that establishes a predetermined tracking loop bandwidth for samples of communication signals received at the signal input and processed within the tracking loop. A tracking loop update circuit updates the loop filter operating parameters. It is operative with the loop filter for increasing or decreasing the tracking loop bandwidth of the phase and frequency tracking loop based on the measured signal-to-noise ratio in the received samples of communication signals at the signal output by the tracking loop and on the known or measured apriori tracking capabilities of demodulator based on the symbol rate of communication signal.
摘要翻译：通信设备包括具有信号输入和可调环路滤波器的相位和频率跟踪环路，其建立用于在信号输入处接收并在跟踪环路内处理的通信信号的样本的预定跟踪环路带宽。跟踪循环更新电路更新环路滤波器操作参数。它与环路滤波器一起操作，用于根据由跟踪环路输出的信号在通信信号的接收样本中测量的信噪比来增加或减少相位和频率跟踪环路的跟踪环路带宽，基于通信信号符号率的已知或测量解调器的先验跟踪能力。

12. 发明授权

US08107572B1 Communications system using adaptive filter for interference reduction 有权
标题翻译：通信系统采用自适应滤波器进行干扰减少
公开(公告)号：US08107572B1
公开(公告)日：2012-01-31
申请号：US11871174
申请日：2007-10-12
申请人： William N. Furman , John W. Nieto , Fred C. Kellerman , Brian C. Padalino
发明人： William N. Furman , John W. Nieto , Fred C. Kellerman , Brian C. Padalino
IPC分类号： H04B1/10
CPC分类号： H04B1/10 , H03H17/0294 , H04L25/03038 , H04L25/03057 , H04L27/0008 , H04L2025/03375 , H04L2025/03566 , H04L2025/03611 , H04L2025/03745
摘要： A communications system receives a modulated signal that carries encoded communications data. An adaptive filter circuit has a plurality of adaptive filters each having a plurality of non-adaptive and adaptive filter taps with weighted coefficients. At a selected adaptive filter, an interference reduction circuit is responsive to one of at least a received state of a demodulator, the type of modulation used by communication system and the input and output power of adaptive filter for updating the adaptive gain of the adaptive filter, selecting the number and order of adaptive filter taps, separating the spacing of multipath introduced by adaptive filter, controlling input and output normalizing circuits to adaptive filter(s) and selecting if signal passed to demodulator is original received signal or signal output by adaptive filter. A demodulator and decoder receive the filtered output signal and demodulate and decode the signal to obtain the communications data.
摘要翻译：通信系统接收携带编码通信数据的调制信号。自适应滤波器电路具有多个自适应滤波器，每个自适应滤波器具有多个具有加权系数的非自适应和自适应滤波器抽头。在所选择的自适应滤波器中，干扰降低电路响应于解调器的至少接收状态中的一种，通信系统使用的调制类型以及自适应滤波器的输入和输出功率，用于更新自适应滤波器的自适应增益选择自适应滤波器抽头的数量和顺序，分离由自适应滤波器引入的多路径的间隔，将输入和输出归一化电路控制为自适应滤波器，并选择是否传送到解调器的信号是原始接收信号或由自适应滤波器输出的信号。解调器和解码器接收滤波后的输出信号并对信号进行解调和解码以获得通信数据。

13. 发明授权

US08098781B1 Communications system using adaptive filter with normalization circuit 有权
标题翻译：通信系统采用自适应滤波器与归一化电路
公开(公告)号：US08098781B1
公开(公告)日：2012-01-17
申请号：US11871180
申请日：2007-10-12
申请人： William N. Furman , John W. Nieto , Fred C. Kellerman , Brian C. Padalino
发明人： William N. Furman , John W. Nieto , Fred C. Kellerman , Brian C. Padalino
IPC分类号： H04B1/10
CPC分类号： H04L25/03038 , H04L2025/03401 , H04L2025/03407 , H04L2025/0342 , H04L2025/03802
摘要： A communications system receives a modulated signal that carries encoded communications data. An adaptive filter has a plurality of non-adaptive and adaptive filter taps with weighted coefficients and a input and output normalizing circuit that obtain sample values from a received signal input to or output from the adaptive filter to increase gain recovery based on type of modulation of encoded communication data, on state of demodulator (preamble search, preamble detected, data state) or other signal acquisition information. A demodulator and decoder receive the filtered output signal and demodulate and decode the signal to obtain the communications data.
摘要翻译：通信系统接收携带编码通信数据的调制信号。自适应滤波器具有多个具有加权系数的非自适应和自适应滤波器抽头以及输入和输出归一化电路，该输入和输出归一化电路从输入到自适应滤波器的接收信号或从自适应滤波器输出的采样值获得采样值，以基于调制类型编码通信数据，解调器的状态（前导码搜索，检测到前导码，数据状态）或其他信号获取信息。解调器和解码器接收滤波后的输出信号并对信号进行解调和解码以获得通信数据。

14. 发明授权

US08059766B2 Communications device and related method with reduced false detects during start of message bit correlation 有权
标题翻译：通信设备和相关方法在消息比特相关开始时减少错误检测
公开(公告)号：US08059766B2
公开(公告)日：2011-11-15
申请号：US11954285
申请日：2007-12-12
申请人： William N. Furman , John W. Nieto , William L. Tyler
发明人： William N. Furman , John W. Nieto , William L. Tyler
IPC分类号： H04L27/06
CPC分类号： H04L27/2275 , H04L1/0013 , H04L1/0054 , H04L7/042 , H04L2027/0046 , H04L2027/0067 , H04L2027/0095
摘要： A communications device includes a signal input for receiving signals such as a binary phase shift keyed (BPSK) communications signal having a repeated preamble bit or symbol pattern. A modem processes the communications signal and includes a demodulator and processor that generates an initial frequency offset estimate and phase error estimate by processing a Fast Fourier Transform (FFT) that detects the repeated preamble pattern for a block of samples within the communications signal, correlates within a start of message correlator to search for a start of message sequence and correlates different phases of the repeated preamble pattern within training correlators for reducing false detections of the start of message. Radio circuitry is operative with the modem for processing communications data obtained from the communications signal.
摘要翻译：通信设备包括用于接收诸如具有重复的前导码位或符号图案的二进制相移键控（BPSK）通信信号的信号的信号输入。调制解调器处理通信信号并且包括解调器和处理器，其通过处理快速傅立叶变换（FFT）来生成初始频率偏移估计和相位误差估计，所述快速傅立叶变换（FFT）检测通信信号内的样本块的重复前同步码模式，消息相关器的开始以搜索消息序列的开始并且将训练相关器内的重复前导码模式的不同相位相关联，以减少对消息开始的错误检测。无线电电路与调制解调器一起操作，用于处理从通信信号获得的通信数据。

15. 发明授权

US07864835B2 Communications system using adaptive filter and variable delay before adaptive filter taps 有权
标题翻译：自适应滤波器之前采用自适应滤波和可变延迟的通信系统
公开(公告)号：US07864835B2
公开(公告)日：2011-01-04
申请号：US11871203
申请日：2007-10-12
申请人： William N. Furman , John W. Nieto , Fred C. Kellerman , Brian C. Padalino
发明人： William N. Furman , John W. Nieto , Fred C. Kellerman , Brian C. Padalino
IPC分类号： H03H7/30
CPC分类号： H04L25/03019
摘要： A communication system receives a modulated signal that carries encoded communication data. An adaptive filter has a plurality of adaptive filter taps and weighted coefficients and a variable delay circuit operative before the adaptive filter taps for separating the spacing of multipath introduced by adaptive filter and producing a filtered output signal with improved multipath performance. A demodulator and decoder receive the filtered output signal from the adaptive filter and demodulate and decode the signal to obtain the communications data.
摘要翻译：通信系统接收承载编码通信数据的调制信号。自适应滤波器具有多个自适应滤波器抽头和加权系数，以及在自适应滤波器抽头之前操作的可变延迟电路，用于分离由自适应滤波器引入的多径的间隔，并产生具有改进的多径性能的滤波输出信号。解调器和解码器从自适应滤波器接收经滤波的输出信号，并对信号进行解调和解码以获得通信数据。

16. 发明申请

US20100150282A1 APPARATUS FOR DECODING CONVOLUTIONAL CODES AND ASSOCIATED METHOD 有权
标题翻译：解码转码和相关方法的装置
公开(公告)号：US20100150282A1
公开(公告)日：2010-06-17
申请号：US12709606
申请日：2010-02-22
申请人： William N. Furman , John W. Nieto
发明人： William N. Furman , John W. Nieto
IPC分类号： H04L27/06
CPC分类号： H04L1/0054 , H04L1/0036 , H04L1/0059
摘要： A decoding device may include a sequential convolutional code decoder, and a parallel convolutional code decoder. The decoding device may further include a controller for selectively processing a convolutionally encoded input signal via at least one of the sequential convolutional code decoder and the parallel convolutional code decoder. The selection of decoder may be based upon a signal-to-noise ratio or the passage of time, for example.
摘要翻译：解码装置可以包括顺序卷积码解码器和并行卷积码解码器。解码装置还可以包括控制器，用于通过顺序卷积码解码器和并行卷积码解码器中的至少一个选择性地处理卷积编码的输入信号。解码器的选择可以基于例如信噪比或时间的流逝。

17. 发明授权

US07512197B2 System and method for removing interfering narrowband signals from wide bandwidth receive signal 有权
标题翻译：用于从宽带宽接收信号中去除干扰窄带信号的系统和方法
公开(公告)号：US07512197B2
公开(公告)日：2009-03-31
申请号：US11052312
申请日：2005-02-07
申请人： William N. Furman , John W. Nieto
发明人： William N. Furman , John W. Nieto
IPC分类号： H03D1/04
CPC分类号： H04B1/1036
摘要： In accordance with the present invention, the system and method removes interfering signals from a communications signal and includes a Fast Fourier Transform (FFT) circuit for taking the FFT of a received signal and segmenting the signal into segments. A frequency shifting circuit can shift each segment in frequency to place an interfering signal within a single FFT band to be later substantially nulled. An inverse FFT circuit can place the segments of signals back within the time domain.
摘要翻译：根据本发明，系统和方法从通信信号中去除干扰信号，并且包括用于对接收到的信号进行FFT的快速傅里叶变换（FFT）电路并将信号分段成段。频移电路可以使频段上的每个频段移动，以将干扰信号置于单个FFT频带内以稍后基本上为零。逆FFT电路可以将信号段放回到时域内。

18. 发明授权

US08731074B2 Communications device using measured frequency offset over time to adjust phase and frequency tracking 有权
标题翻译：通信设备使用测量的频率偏移随时间调整相位和频率跟踪
公开(公告)号：US08731074B2
公开(公告)日：2014-05-20
申请号：US12212020
申请日：2008-09-17
申请人： William N. Furman , John W. Nieto , William L. Tyler
发明人： William N. Furman , John W. Nieto , William L. Tyler
IPC分类号： H04K1/10 , H03D3/18 , H04N7/20
CPC分类号： H04L7/0337 , H03L7/0807 , H03L7/1075
摘要： The communications device includes a phase and frequency tracking loop having a signal input and an adjustable loop filter that establishes a predetermined tracking loop bandwidth for samples of communication signals received at the signal input and processed within the tracking loop. A tracking loop update circuit updates loop filter operating parameters and is operative with the loop filter for increasing or decreasing the tracking loop bandwidth of the phase and frequency tracking loop based on the dynamics of the frequency offset of measured samples from the output of the loop filter over time.
摘要翻译：通信设备包括相位和频率跟踪环路，其具有信号输入端和可调节环路滤波器，该可调环路滤波器为在信号输入端接收并在跟踪环路内处理的通信信号的样本建立预定的跟踪环路带宽。跟踪环路更新电路更新环路滤波器操作参数，并且与环路滤波器一起工作，以便基于来自环路滤波器的输出的测量样本的频率偏移的动态来增加或减少相位和频率跟踪环路的跟踪环路带宽随着时间的推移。

19. 发明授权

US08488719B2 Wireless communications device with multiple demodulators and related methods 失效
标题翻译：具有多个解调器和相关方法的无线通信设备
公开(公告)号：US08488719B2
公开(公告)日：2013-07-16
申请号：US12855483
申请日：2010-08-12
申请人： John W. Nieto , William N. Furman
发明人： John W. Nieto , William N. Furman
IPC分类号： H04L27/06
CPC分类号： H04L27/0008 , H04L1/0046 , H04L27/0012 , H04W52/0229 , H04W52/0245 , Y02D70/22
摘要： A wireless communications device may be configured to perform a first demodulation based upon a first sampling rate of a received signal to generate a first demodulated signal and determine therefrom whether a first error value is not greater than a first threshold, and, if so then decode the first demodulated signal. If the first error value is greater than the first threshold, a second demodulation is performed based upon a second sampling rate of the received signal greater than or equal to the first sampling rate to generate a second demodulated signal and determine therefrom whether a second error value is not greater than a second threshold, and, if so, then decode the second demodulated signal. If the second error value is greater than the second threshold, the second demodulation is performed at least one additional time with at least one change thereto.
摘要翻译：无线通信设备可以被配置为基于接收信号的第一采样率执行第一解调，以产生第一解调信号，并由其确定第一误差值是否不大于第一阈值，如果是，则解码第一解调信号。如果第一误差值大于第一阈值，则基于大于或等于第一采样率的接收信号的第二采样率来执行第二解调，以产生第二解调信号，并从其确定第二误差值不大于第二阈值，并且如果是，则对第二解调信号进行解码。如果第二误差值大于第二阈值，则对至少一个附加时间执行第二解调，并对其进行至少一个改变。

20. 发明申请

US20130054237A1 COMMUNICATIONS SYSTEM WITH SPEECH-TO-TEXT CONVERSION AND ASSOCIATED METHODS 有权
标题翻译：具有语音转换和相关方法的通信系统
公开(公告)号：US20130054237A1
公开(公告)日：2013-02-28
申请号：US13217819
申请日：2011-08-25
申请人： William N. Furman , John W. Nieto , Marcelo De Risio
发明人： William N. Furman , John W. Nieto , Marcelo De Risio
IPC分类号： G10L15/26
CPC分类号： G10L15/26
摘要： A communications system includes a first communications device cooperating with a second communications device. The first communications device multiplexes a digital speech message and a corresponding text message into a multiplexed signal, and wirelessly transmits the multiplexed signal. The second communications device wirelessly receives the multiplexed signal, de-multiplexes the multiplexed signal digital into the speech message and the corresponding text message, decodes the speech message for an audio output transducer, and operates a text processor on the corresponding text message for display. The corresponding text message is displayed in synchronization with the speech message output by the audio output transducer. A memory is coupled to the text processor for storing the text message, and the text processor is configured to display the stored text message.
摘要翻译：通信系统包括与第二通信设备协作的第一通信设备。第一通信设备将数字语音消息和对应的文本消息复用到多路复用信号中，并且无线地发送多路复用的信号。第二通信设备无线地接收复用的信号，将多路复用的信号数字解复用到语音消息和对应的文本消息中，解码用于音频输出换能器的语音消息，并且在对应的文本消息上操作文本处理器以进行显示。相应的文本消息与音频输出传感器输出的语音消息同步显示。存储器耦合到文本处理器以存储文本消息，并且文本处理器被配置为显示所存储的文本消息。

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