公开(公告)号：US06901242B2

公开(公告)日：2005-05-31

申请号：US09747143

申请日：2000-12-22

申请人： Brian W. Kroeger ,  Roy R. Stehlik

发明人： Brian W. Kroeger ,  Roy R. Stehlik

IPC分类号： H04L27/00 ,  H04B1/16 ,  H04B7/12 ,  H04H20/46 ,  H04L1/02 ,  H04L1/04 ,  H04L27/26 ,  H04L27/32 ,  H04B1/00 ,  H04B1/10 ,  H04B7/00 ,  H04B15/00 ,  H04B17/00

CPC分类号： H04H20/22 ,  H04B7/12 ,  H04H20/30 ,  H04H60/11 ,  H04H2201/183 ,  H04H2201/20 ,  H04L1/02 ,  H04L5/0005

摘要： A system is provided wherein a primary radio signal and a redundant radio signal are transmitted from a transmitter subsystem and received by a receiver subsystem. The output of an audio source is coupled to a modulator for modulating a radio frequency signal for coupling to a transmit antenna. A second output of audio source is coupled to a delay circuit, for adding a predetermined time delay thereto. The delayed audio source signal is coupled to a modulator for modulating a second radio frequency signal that is also coupled to the transmit antenna. The receiver subsystem receives both the primary radio signal and the delayed redundant radio signal and couples each to a respective demodulator. At least one demodulator includes a circuit for determining the degradation in the primary radio signal and provides a quality measurement output signal to a blend control circuit.

摘要翻译： 提供了一种系统，其中主要无线电信号和冗余无线电信号从发射机子系统发射并由接收机子系统接收。 音频源的输出耦合到调制器，用于调制用于耦合到发射天线的射频信号。 音频源的第二输出耦合到延迟电路，用于向其添加预定的时间延迟。 延迟的音频源信号耦合到调制器，用于调制也耦合到发射天线的第二射频信号。 接收机子系统接收主无线电信号和延迟的冗余无线电信号，并将每个信号耦合到相应的解调器。 至少一个解调器包括用于确定主无线电信号的劣化的电路，并向混合控制电路提供质量测量输出信号。

公开(公告)号：US5768323A

公开(公告)日：1998-06-16

申请号：US322854

申请日：1994-10-13

申请人： Brian W. Kroeger ,  Joseph B. Bronder ,  Tod A. Oblak ,  Jeffrey S. Baird

发明人： Brian W. Kroeger ,  Joseph B. Bronder ,  Tod A. Oblak ,  Jeffrey S. Baird

IPC分类号： H03L7/099 ,  H04L7/00 ,  H04L7/02 ,  H04L27/227

CPC分类号： H04L27/2273 ,  H03L7/0994 ,  H04L7/0029 ,  H04L7/0083

摘要： A method and apparatus for synchronizing symbol timing for a QPSK demodulator. A matched filter pair outputs respective "early-punctual-late" signals. The early and late signals are input to a symbol synchronizing estimator that produces an interpolation control signal used by the filters to synchronize the symbol timing to the sample timing. The punctual signal is output as an information bearing signal representing the received inphase and quadrature signals. The matched filters are interpolating matched filters. The symbol synchronizing estimator normalizes the early and late signals in a manner that allow the demodulator to "flywheel" over signals having a low signal to noise ratio below a predetermined threshold.

摘要翻译： 一种用于使QPSK解调器的符号定时同步的方法和装置。 匹配滤波器对输出相应的“早点延迟”信号。 早期和晚期信号被输入到符号同步估计器，该估计器产生滤波器使用的插值控制信号，以使符号定时与采样定时同步。 作为表示接收的同相和正交信号的信息承载信号输出准时信号。 匹配滤波器内插匹配滤波器。 符号同步估计器以使得解调器能够以低于预定阈值的低信噪比的信号“飞轮”的方式对早期和晚期信号进行归一化。

公开(公告)号：US5579345A

公开(公告)日：1996-11-26

申请号：US322847

申请日：1994-10-13

申请人： Brian W. Kroeger ,  Jeffrey S. Baird ,  Joseph B. Bronder

发明人： Brian W. Kroeger ,  Jeffrey S. Baird ,  Joseph B. Bronder

IPC分类号： H04L27/00 ,  H04L27/233 ,  H04L27/06 ,  H03D3/22

CPC分类号： H04L27/2332 ,  H04L2027/003 ,  H04L2027/0048

摘要： A carrier tracking loop that uses a frequency locked loop (FLL) and incorporates synchronized matched filters to minimize complexity of the system. The synchronized matched filters eliminate out-of-band interference while minimizing computation. The carrier tracking loop has an improved error signal generation to extend a frequency range and by employing error signal normalization, which extends the dynamic range of the amplitude of the input signal and allows the frequency to flywheel when signal fading occurs.

摘要翻译： 使用频率锁定环路（FLL）的载波跟踪环路，并集成了同步的匹配滤波器，以最大程度降低系统的复杂度。 同步匹配滤波器消除带外干扰，同时最小化计算。 载波跟踪环路具有改进的误差信号产生，以扩展频率范围并通过采用误差信号归一化，其延长了输入信号幅度的动态范围，并允许频率在发生信号衰落时飞行。

公开(公告)号：US5517535A

公开(公告)日：1996-05-14

申请号：US322845

申请日：1994-10-13

申请人： Brian W. Kroeger ,  Jeffrey S. Baird

发明人： Brian W. Kroeger ,  Jeffrey S. Baird

IPC分类号： G06F1/02 ,  H03D3/24

CPC分类号： G06F1/022 ,  G06F2101/04

摘要： A numerically controlled oscillator that outputs a complex exponential value (sine and cosine). The numerically controlled oscillator inputs a scalar phase increment and uses the scalar phase increment to approximate a complex exponential phasor increment. A complex multiplier multiplies the exponential increment by an exponential value previously output from the oscillator to yield a multiplication result. A recursive amplitude normalizer, connected to the complex multiplier, normalizes the multiplication result to yield the complex exponential value.

摘要翻译： 输出复数指数值（正弦和余弦）的数控振荡器。 数字振荡器输入标量相位增量，并使用标量相位增量近似复指数相量增量。 复数乘法器将指数增量乘以先前从振荡器输出的指数值，以产生乘法结果。 连接到复数乘法器的递归幅度归一化器对乘法结果进行归一化以产生复指数值。

公开(公告)号：US20130115903A1

公开(公告)日：2013-05-09

申请号：US13536203

申请日：2012-06-28

申请人： Brian W. Kroeger ,  Paul J. Peyla ,  Jeffrey S. Baird

发明人： Brian W. Kroeger ,  Paul J. Peyla ,  Jeffrey S. Baird

IPC分类号： H04B1/18

CPC分类号： H04B7/0857 ,  H04B7/0845 ,  H04B7/0885 ,  H04H2201/18

摘要： A radio receiver includes a first signal path including a first tuner configured to receive a first signal from a first antenna, and a first demodulator configured to demodulate symbols from an output of the first tuner to produce first branch metrics derived from the demodulated symbols; a second signal path including a second tuner configured to receive a second signal from a second antenna, and a second demodulator configured to demodulate symbols from an output of the second tuner to produce second branch metrics derived from the demodulated symbols; a combiner for maximum ratio combining the first branch metrics and the second branch metrics; and processing circuitry to process the combined first and second branch metrics to produce an output signal.

摘要翻译： 无线电接收机包括：第一信号路径，包括被配置为从第一天线接收第一信号的第一调谐器;以及第一解调器，被配置为从第一调谐器的输出解调符号，以产生从解调符号导出的第一分支度量; 第二信号路径，包括被配置为从第二天线接收第二信号的第二调谐器，以及第二解调器，被配置为从所述第二调谐器的输出解调符号，以产生从解调符号导出的第二分支度量; 组合第一分支度量和第二分支度量的最大比率的组合器; 以及处理电路，用于处理组合的第一和第二分支度量以产生输出信号。

公开(公告)号：US20120189070A1

公开(公告)日：2012-07-26

申请号：US13012847

申请日：2011-01-25

申请人： Brian W. Kroeger

发明人： Brian W. Kroeger

IPC分类号： H04L27/28 ,  H04L25/03

CPC分类号： H04L27/2623

摘要： A method includes: (a) modulating a set of subcarriers with a set of data to produce a modulated OFDM symbol vector; (b) modulating a FM carrier signal with the set of data to produce a modulated FM symbol; (c) combining the modulated OFDM symbol and the modulated FM symbol to produce a modulated hybrid symbol; (d) limiting the magnitude of the modulated hybrid symbol to produce a first limited modulated hybrid symbol; (e) demodulating the first limited modulated hybrid symbol to recover distorted QPSK constellations; (f) constraining the distorted QPSK constellations to values greater than or equal to a minimum threshold value to produce constrained QPSK constellations; (g) demodulating the modulated hybrid symbol to produce a demodulated hybrid symbol vector; (h) subtracting the demodulated FM symbol vector from the Hybrid symbol vector to produce modified OFDM symbol vector; (i) applying a mask to inactive subcarriers in the plurality of subcarriers of the OFDM symbol vector; (j) modulating an OFDM symbol vector with OFDM modulation to produce a modified modulated OFDM symbol; (k) combining the modulated OFDM symbol and the modulated FM symbol to produce a modulated hybrid symbol; and (l) outputting the modified modulated hybrid symbol.

摘要翻译： 一种方法包括：（a）用一组数据调制一组子载波以产生经调制的OFDM符号向量; （b）用该组数据调制FM载波信号以产生经调制的FM符号; （c）组合经调制的OFDM符号和经调制的FM符号以产生调制的混合符号; （d）限制调制的混合符号的大小以产生第一有限调制混合符号; （e）解调第一有限调制混合符号以恢复失真的QPSK星座; （f）将失真的QPSK星座约束到大于或等于最小阈值的值以产生受限的QPSK星座; （g）解调调制的混合符号以产生解调的混合符号向量; （h）从混合符号向量中减去解调的FM符号向量以产生修改的OFDM符号向量; （i）对OFDM符号向量的多个子载波中的无效子载波应用掩码; （j）使用OFDM调制调制OFDM符号向量以产生修改的调制OFDM符号; （k）组合调制的OFDM符号和调制的FM符号以产生调制的混合符号; 和（l）输出修改后的调制混合符号。

公开(公告)号：US06178317B1

公开(公告)日：2001-01-23

申请号：US08947902

申请日：1997-10-09

申请人： Brian W. Kroeger ,  Roy R. Stehlik

发明人： Brian W. Kroeger ,  Roy R. Stehlik

IPC分类号： H04B110

CPC分类号： H04H20/22 ,  H04B7/12 ,  H04H20/30 ,  H04H60/11 ,  H04H2201/183 ,  H04H2201/20 ,  H04L1/02 ,  H04L5/0005

摘要： A system (100) is provided wherein a primary radio signal and a redundant radio signal are transmitted from a transmitter subsystem (120) and received by a receiver subsystem (140). The output (112) of an audio source (110) is coupled to a modulator (160) for modulating a radio frequency signal (162) for coupling to a transmit antenna (172). A second output (114) of audio source (110) is coupled to a delay circuit (116), for adding a predetermined time delay thereto. The delayed audio source signal is coupled to a modulator (164) for modulating a second radio frequency signal (166) that is also coupled to the transmit antenna (172). The receiver subsystem (140) receives both the primary radio signal and the delayed redundant radio signal and couples each to a respective demodulator (180, 182). At least one demodulator (180) includes a circuit (181) for determining the degradation in the primary radio signal and provides a quality measurement output signal (186) to a blend control circuit (190). The recovered primary audio signal from demodulator (180) is coupled to a second delay circuit (184), the time delay of second delay circuit (184) being substantially equal to the time delay of delay circuit (116). The audio output from delay circuit (184) and the redundant audio output from demodulator (182) are coupled to a blending subsystem (135), wherein each is combined with a weighting factor and then combined together to form a composite audio signal for coupling to the audio output circuit (150).

摘要翻译： 提供了一种系统（100），其中主要无线电信号和冗余无线电信号从发射机子系统（120）发送并由接收机子系统（140）接收。 音频源（110）的输出（112）耦合到调制器（160），用于调制用于耦合到发射天线（172）的射频信号（162）。 音频源（110）的第二输出（114）耦合到延迟电路（116），用于向其添加预定的时间延迟。 延迟的音频源信号耦合到调制器（164），用于调制也耦合到发射天线（172）的第二射频信号（166）。 接收机子系统（140）接收主无线电信号和延迟的冗余无线电信号，并且将每个信号耦合到相应的解调器（180,182）。 至少一个解调器（180）包括用于确定主无线电信号的劣化的电路（181），并向混合控制电路（190）提供质量测量输出信号（186）。 来自解调器（180）的恢复的主音频信号被耦合到第二延迟电路（184），第二延迟电路（184）的时间延迟基本上等于延迟电路（116）的时间延迟。 来自延迟电路（184）的音频输出和从解调器（182）输出的冗余音频耦合到混合子系统（135），其中每个与混合子系统（135）组合，然后组合在一起以形成复合音频信号，以耦合到 音频输出电路（150）。

公开(公告)号：US5127067A

公开(公告)日：1992-06-30

申请号：US580059

申请日：1990-09-10

申请人： Robert J. Delcoco ,  Brian W. Kroeger ,  John J. Kurtz

发明人： Robert J. Delcoco ,  Brian W. Kroeger ,  John J. Kurtz

IPC分类号： H04B10/207 ,  H04B10/213

CPC分类号： H04B10/275 ,  H04B10/271 ,  H04B10/272

摘要： In a local area network all communication nodes are connected only to a centrally located star network coupler, but data is transmitted from one communication node to the next active communication node in a sequence defined by a ring protocol. The star network coupler may be implemented by switches capable of connecting a receiver for one communication node to a transmitter for the next communication node or to a bypass line for the next communication node. However, preferably the star network coupler comprises a selective multiplexer for each of the nodes. Each selective multiplexer has inputs connected to all of the communication nodes to receive therefrom transmission data and a line status signal indicating communication activity with each node so that inactive nodes can be bypassed.

摘要翻译： 在局域网中，所有通信节点仅连接到位于中心的星形网络耦合器，但数据以环形协议定义的序列从一个通信节点传输到下一个主动通信节点。 星形网络耦合器可以由能够将一个通信节点的接收机连接到下一个通信节点的发射机或下一个通信节点的旁路线的交换机来实现。 然而，优选地，星形网络耦合器包括用于每个节点的选择性多路复用器。 每个选择性多路复用器具有连接到所有通信节点的输入，以从其接收传输数据和指示与每个节点的通信活动的线路状态信号，从而可以绕过非活动节点。

公开(公告)号：US4747143A

公开(公告)日：1988-05-24

申请号：US755235

申请日：1985-07-12

申请人： Brian W. Kroeger ,  John J. Kurtz

发明人： Brian W. Kroeger ,  John J. Kurtz

IPC分类号： G10L21/02 ,  G10L5/00

CPC分类号： G10L21/0208

摘要： An arrangement for a speech enhancement processor which maintains the processed speech at a constant level regardless of large changes in the associated noise level. The composite speech and noise signal is applied to a first AGC circuit and then to a speech enhancement system which removes tonal, impulse, and wideband noises from the signal. The extracted noise power estimates are subtracted from the constant amplitude signal to provide a gain control signal value to which the gain of a second variable gain amplifier is inversely proportional. The amplifier multiplies the processed speech output from the enhancement system and, because of the variable gain control, provides an output speech signal having short-term amplitude levels which correspond to those of the input speech signal, and having a constant long-term amplitude level.

摘要翻译： 用于语音增强处理器的装置，其将经处理的语音维持在恒定的水平，而不管相关噪声水平的大的变化。 复合语音和噪声信号被施加到第一AGC电路，然后被应用于从信号中去除音调，脉冲和宽带噪声的语音增强系统。 从恒定幅度信号中减去所提取的噪声功率估计值，以提供第二可变增益放大器的增益成反比的增益控制信号值。 放大器将来自增强系统的经处理语音输出相乘，并且由于可变增益控制，提供具有对应于输入语音信号的短期幅度电平的输出语音信号，并具有恒定的长期幅度电平 。

公开(公告)号：US08831546B2

公开(公告)日：2014-09-09

申请号：US13536203

申请日：2012-06-28

申请人： Brian W. Kroeger ,  Paul J. Peyla ,  Jeffrey S. Baird

发明人： Brian W. Kroeger ,  Paul J. Peyla ,  Jeffrey S. Baird

IPC分类号： H04B1/18

CPC分类号： H04B7/0857 ,  H04B7/0845 ,  H04B7/0885 ,  H04H2201/18

摘要： A radio receiver includes a first signal path including a first tuner configured to receive a first signal from a first antenna, and a first demodulator configured to demodulate symbols from an output of the first tuner to produce first branch metrics derived from the demodulated symbols; a second signal path including a second tuner configured to receive a second signal from a second antenna, and a second demodulator configured to demodulate symbols from an output of the second tuner to produce second branch metrics derived from the demodulated symbols; a combiner for maximum ratio combining the first branch metrics and the second branch metrics; and processing circuitry to process the combined first and second branch metrics to produce an output signal.

摘要翻译： 无线电接收机包括：第一信号路径，包括被配置为从第一天线接收第一信号的第一调谐器;以及第一解调器，被配置为从第一调谐器的输出解调符号，以产生从解调符号导出的第一分支度量; 第二信号路径，包括被配置为从第二天线接收第二信号的第二调谐器，以及第二解调器，被配置为从所述第二调谐器的输出解调符号，以产生从解调符号导出的第二分支度量; 组合第一分支度量和第二分支度量的最大比率的组合器; 以及处理电路，用于处理组合的第一和第二分支度量以产生输出信号。