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1. 发明授权

US06178317B1 System and method for mitigating intermittent interruptions in an audio radio broadcast system 失效
标题翻译：用于减轻音频无线电广播系统中间歇性中断的系统和方法
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）。

2. 发明授权

US06901242B2 System and method for mitigating intermittent interruptions in an audio radio broadcast system 有权
标题翻译：用于减轻音频无线电广播系统中间歇性中断的系统和方法
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。

3. 发明授权

US5517529A UHF/L-Band monolithic direct digital receiver 失效
标题翻译： UHF / L波段单片直接数字接收机
公开(公告)号：US5517529A
公开(公告)日：1996-05-14
申请号：US138905
申请日：1993-10-18
申请人： Roy R. Stehlik
发明人： Roy R. Stehlik
IPC分类号： H03D3/00 , H03K9/00 , H04L27/06 , H04L27/14 , H04L27/22
CPC分类号： H03D3/007
摘要： A monolithic direct digital UHF/L-Band receiver for receiving and processing a UHF/L-Band analog signal and deriving digitized samples, the receiver operating in a tuning frequency range centered at a center frequency and having a baseband frequency, a lower bandedge frequency, and an upper bandedge frequency. The receiver comprises: a substrate; an analog-to-digital converter, mounted on the substrate, for digitally sampling at a sample rate the UHF/L-Band analog signal; a heterodyning circuit, coupled to the analog-to-digital converter and mounted on the substrate, for mixing the digitally sampled signal with a mixing signal thereby shifting the center frequency of the tuning frequency range of the sampled signal to the baseband frequency; and means, coupled to the heterodyning circuit and mounted on the substrate, for decimation filtering and decimating the mixed signal to obtain a second sample rate lower than the sample rate.
摘要翻译：一种用于接收和处理UHF / L波段模拟信号并导出数字化采样的单片直接数字UHF / L波段接收机，该接收机以中心频率为中心并具有基带频率的调谐频率范围，低频带频率，和上带宽频率。接收机包括：基板; 安装在基板上的模数转换器，用于以采样率对UHF / L波段模拟信号进行数字采样; 耦合到模数转换器并安装在基板上的外差电路，用于将数字采样信号与混合信号混合，从而将采样信号的调谐频率范围的中心频率移位到基带频率; 以及耦合到外差电路并安装在基板上的装置，用于对混合信号进行抽取滤波和抽取，以获得低于采样率的第二采样率。

4. 发明授权

US5434578A Apparatus and method for automatic antenna beam positioning 失效
标题翻译：自动天线波束定位的装置和方法
公开(公告)号：US5434578A
公开(公告)日：1995-07-18
申请号：US139674
申请日：1993-10-22
申请人： Roy R. Stehlik
发明人： Roy R. Stehlik
IPC分类号： H01Q3/26 , H01J29/52
CPC分类号： H01Q3/26
摘要： A system for automatically forming a receive beam being positioned in the direction of a corresponding incoming signal, the system having a known signal corresponding to the incoming signal. The system comprises a plurality, M, of channels, each of the channels collecting the incoming signal and generating a plurality, L, of incoming complex data samples for the incoming signal and a plurality, L, of known complex data samples for the known signal. The system also includes severaly digital beamforming means for forming the receive beam. Each of the digital beamforming means includes means, coupled to the channels, for computing an M by 1 weight vector, W, having several weight elements each corresponding to one of the channels, the computing means including means for solving, for W, the equation, R W=C, where R is an M by M coefficient matrix, an element in the i-th row and the j-th column being an estimate of a value obtained from cross-correlating the incoming complex data sample generated by the i-th channel with the incoming complex data sample of the j-th channel, and where C is an M by 1 constant vector, an element in the i-th row being an estimate of a value obtained from cross-correlating the incoming complex data sample generated by the i-th channel with the known complex data samples. Each of the digital beamforming means further includes multipliers for generating weighted signals, each of the multipliers coupled to a corresponding one of the channels and multiplying one of the weight elements by the incoming complex data samples generated by the corresponding channel, and an adder, coupled to the multipliers, for adding each of the weighted signals.
摘要翻译：一种用于自动形成接收光束的方式的系统，该接收光束位于对应的输入信号的方向上，该系统具有对应于输入信号的已知信号。该系统包括多个M个通道，每个通道收集输入信号并产生用于输入信号的多个输入复数数据样本的L个以及用于已知信号的已知复数数据样本的多个L 。该系统还包括用于形成接收束的几个数字波束成形装置。数字波束成形装置中的每一个包括耦合到信道的装置，用于计算具有多个权重元素的M乘1权重向量W，每个加权元素对应于一个信道，所述计算装置包括用于对于W求解等式的装置，RW = C，其中R是M乘M系数矩阵，第i行和第j列中的元素是从由i系统矩阵生成的输入复数数据样本的相互关联而获得的值的估计，与第j个信道的输入复数据样本进行通信，其中C是M×1常数向量，第i行中的元素是从输入的复数据样本的互相关中获得的值的估计值由第i个信道与已知的复杂数据样本产生。数字波束成形装置中的每一个还包括用于产生加权信号的乘法器，每个乘法器耦合到通道中的相应一个，并且通过由相应通道产生的输入复数数据样本将权重元素之一相乘，并且加法器到乘法器，用于添加每个加权信号。

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