公开(公告)号：US09184961B2

公开(公告)日：2015-11-10

申请号：US13189659

申请日：2011-07-25

申请人： Brian W. Kroeger ,  Paul J. Peyla

发明人： Brian W. Kroeger ,  Paul J. Peyla

IPC分类号： H04B1/16 ,  H04L27/156

CPC分类号： H04B1/123 ,  H04B1/1036 ,  H04B2001/1045 ,  H04L27/14 ,  H04L27/156 ,  H04L43/16

摘要： A method includes: receiving an FM radio signal including an analog-modulated portion; digitally sampling an analog-modulated portion of the radio signal to produce a plurality of samples; using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute a signal quality metric; detecting sum and difference components of the baseband multiplex signal content; using the baseband content to produce an output signal; and blending the output signal from stereo to monaural as the signal quality metric falls below a threshold value.

摘要翻译： 一种方法包括：接收包括模拟调制部分的FM无线电信号; 对无线电信号的模拟调制部分进行数字采样以产生多个采样; 使用样本块的平均幅度和RMS幅度之间的比率来计算信号质量度量; 检测基带复用信号内容的和差分量; 使用基带内容产生输出信号; 并且当信号质量度量低于阈值时，将来自立体声的输出信号混合到单声道。

公开(公告)号：US20130029585A1

公开(公告)日：2013-01-31

申请号：US13189659

申请日：2011-07-25

申请人： Brian W. Kroeger ,  Paul J. Peyla

发明人： Brian W. Kroeger ,  Paul J. Peyla

IPC分类号： H04W4/00

CPC分类号： H04B1/123 ,  H04B1/1036 ,  H04B2001/1045 ,  H04L27/14 ,  H04L27/156 ,  H04L43/16

摘要： A method includes: receiving an FM radio signal including an analog-modulated portion; digitally sampling an analog-modulated portion of the radio signal to produce a plurality of samples; using a ratio between an average magnitude and an RMS magnitude of a block of the samples to compute a signal quality metric; detecting sum and difference components of the baseband multiplex signal content; using the baseband content to produce an output signal; and blending the output signal from stereo to monaural as the signal quality metric falls below a threshold value.

摘要翻译： 一种方法包括：接收包括模拟调制部分的FM无线电信号; 对无线电信号的模拟调制部分进行数字采样以产生多个采样; 使用样本块的平均幅度和RMS幅度之间的比率来计算信号质量度量; 检测基带复用信号内容的和差分量; 使用基带内容产生输出信号; 并且当信号质量度量低于阈值时，将来自立体声的输出信号混合到单声道。

公开(公告)号：US20120328057A1

公开(公告)日：2012-12-27

申请号：US13165325

申请日：2011-06-21

申请人： Brian W. Kroeger ,  Paul J. Peyla

发明人： Brian W. Kroeger ,  Paul J. Peyla

IPC分类号： H04L27/06

CPC分类号： H04B7/0814 ,  H04B7/02 ,  H04B7/0805 ,  H04B17/29 ,  H04B17/309 ,  H04H2201/12 ,  H04H2201/18 ,  H04H2201/19 ,  H04H2201/20 ,  H04L1/20 ,  H04L27/2663 ,  H04L27/2678

摘要： A method for detecting the digital quality of a radio signal includes: receiving a radio signal including a digital portion modulated by a series of symbols each including a plurality of samples; computing correlation points between endpoint samples in cyclic prefix regions of adjacent symbols; and using the correlation points to produce a digital signal quality metric. Receivers that implement the method are also provided.

摘要翻译： 一种用于检测无线电信号的数字质量的方法包括：接收包括由包括多个采样的一系列符号调制的数字部分的无线电信号; 计算相邻符号的循环前缀区域中的端点样本之间的相关点; 并使用相关点来产生数字信号质量度量。 还提供了实现该方法的接收器。

公开(公告)号：US07724850B2

公开(公告)日：2010-05-25

申请号：US10874681

申请日：2004-06-23

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： H04B7/10

CPC分类号： H04B7/0805 ,  H04L25/0232 ,  H04L27/261 ,  H04L27/2647

摘要： A method is provided for coherently tracking a radio signal including a plurality of digitally modulated reference subcarriers. The method comprises the steps of receiving symbols transmitted on the reference subcarriers, combining the reference subcarrier symbols with a known reference sequence conjugate to produce a plurality of samples, median filtering the samples to produce filtered samples, and smoothing the samples for each of the reference subcarriers over the plurality of reference subcarriers to produce a coherent reference signal estimate for each of the subcarriers. A receiver for coherently tracking a radio signal including at least one digitally modulated reference carrier is also provided.

摘要翻译： 提供了一种用于相干跟踪包括多个数字调制参考子载波的无线电信号的方法。 该方法包括以下步骤：接收在参考子载波上发送的符号，将参考子载波符号与已知参考序列共轭相结合以产生多个样本，对样本进行中值滤波以产生滤波样本，以及平滑每个参考的样本 多个参考子载波上的子载波，以产生每个子载波的相干参考信号估计。 还提供了一种用于相干跟踪包括至少一个数字调制参考载波的无线电信号的接收机。

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：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。

公开(公告)号：US5828957A

公开(公告)日：1998-10-27

申请号：US615937

申请日：1996-03-14

申请人： Brian W. Kroeger ,  Gregory W. Seker ,  Paul J. Peyla ,  George N. Eberl ,  Denise M. Cammarata

发明人： Brian W. Kroeger ,  Gregory W. Seker ,  Paul J. Peyla ,  George N. Eberl ,  Denise M. Cammarata

IPC分类号： H04B7/185 ,  H04Q7/00

CPC分类号： H04B7/18545 ,  H04B7/18539

摘要： An improved satellite beam acquisition and crossover technique for finding an appropriate satellite beam by searching for and acquiring a strongest pilot channel, searching for signalling channels on the acquired strongest pilot channel and monitoring the acquired signalling channel. Beam acquisition of a continuous wave pilot as in the preferred embodiment is faster and more reliable than beam acquisition of a modulated channel. Moreover, the acquired pilot channel can be used to unambiguously precalibrate the frequency reference of the mobile terminal. Also, acquisition of the pilot ensures that the corresponding satellite beam is not blocked or shadowed immediately prior to searching for a signalling channel, which significantly improves the reliability while reducing the time required for the search process. Mitigation of fading and shadowing is provided by using fast attack, slow decay non-linear filtering.

摘要翻译： 通过搜索和获取最强导频信道，搜索所获得的最强导频信道上的信令信道并监测所获取的信令信道，来改进卫星波束获取和交叉技术，以找到适当的卫星波束。 如在优选实施例中的连续波导导的光束采集比调制信道的光束采集更快更可靠。 此外，获取的导频信道可以用于明确地预校准移动终端的频率参考。 此外，采集导频确保相应的卫星波束在搜索信令信道之前不被立即阻塞或遮蔽，这显着提高了可靠性，同时减少了搜索过程所需的时间。 通过使用快速攻击，慢衰减非线性滤波来提供衰减和遮蔽的缓解。