公开(公告)号：US09584347B2

公开(公告)日：2017-02-28

申请号：US13906465

申请日：2013-05-31

Applicant: Silicon Laboratories Inc.

Inventor： Javier Elenes ,  Dana Taipale

IPC: H04L27/26 ,  H04L25/03

CPC classification number: H04L25/03834 ,  H04L27/2605 ,  H04L27/2647 ,  H04L27/2649

Abstract: Systems and methods are disclosed for rapid detection of digital content within received radio frequency (RF) signals. The disclosed embodiments digitize received RF signals and apply a sliding window average to subsampled complex magnitudes for the digital samples to generate subsampled magnitude values. The subsampled magnitude values are then collected over a small number of symbols for the digital content, and the results are analyzed to determine whether or not digital content is present with the received signals. For example, multi-symbol histograms and magnitude ratios determined over multiple symbols can then be utilized to make the determination of whether digital content is present in the received signals. The resulting detection determination can be utilized further to control operations of systems utilizing the disclosed embodiments. The disclosed embodiments can be used, for example, to detect the presence of HD (High Definition) Radio digital content within broadcast channels.

Abstract translation: 公开了用于在接收的射频（RF）信号内快速检测数字内容的系统和方法。 所公开的实施例数字化所接收的RF信号，并对数字采样的子采样复数幅度应用滑动窗口平均值，以产生二次采样幅度值。 然后通过数字内容的少量符号收集子采样幅度值，并分析结果以确定数字内容是否与接收信号一起存在。 例如，可以利用在多个符号上确定的多符号直方图和幅度比来确定数字内容是否存在于所接收的信号中。 可以进一步利用所得到的检测确定来控制利用所公开的实施例的系统的操作。 所公开的实施例可以用于例如在广播信道内检测HD（高清晰度）无线电数字内容的存在。

公开(公告)号：US09312972B2

公开(公告)日：2016-04-12

申请号：US13906607

申请日：2013-05-31

Applicant: Silicon Laboratories Inc.

Inventor： Javier Elenes

IPC: H04H20/22 ,  H04H20/88 ,  H04H20/30 ,  H04H40/81

CPC classification number: H04H20/88 ,  H04H20/22 ,  H04H20/30 ,  H04H40/81

Abstract: Systems and methods are disclosed that may be implemented to process a received RF spectrum that includes both analog modulated and digitally modulated RF signals to blend between a digital demodulated signal and an analog demodulated signal obtained from the received RF spectrum prior to performing one or more signal quality mitigation operations on the blended signal (e.g., such as stereo blend, hi-cut, etc.). In one embodiment, the digital demodulated signal and the analog demodulated signal may include at least some of the same information, e.g., such as information from simulcast digital and analog channels that are obtained from the same received RF spectrum.

Abstract translation: 公开了可以实施的系统和方法来处理包括模拟调制和数字调制的RF信号的接收RF频谱，以在数字解调信号和从所接收的RF频谱获得的模拟解调信号之前混合，然后再执行一个或多个信号 混合信号的质量降低操作（例如立体声混合，高切等）。 在一个实施例中，数字解调信号和模拟解调信号可以包括相同的信息中的至少一些，例如，从相同接收的RF频谱获得的来自联播数字和模拟信道的信息。

公开(公告)号：US20140254729A1

公开(公告)日：2014-09-11

申请号：US14283648

申请日：2014-05-21

Applicant: Silicon Laboratories Inc.

Inventor： Javier Elenes ,  Brian D. Green ,  Michael R. May

IPC: H04B1/08 ,  H04L25/03

CPC classification number: H04B1/086 ,  H04H20/30 ,  H04H60/12 ,  H04H2201/18 ,  H04L25/03834 ,  H04L27/0008 ,  H04W52/0229 ,  Y02D70/00

Abstract: In one embodiment, a receiver front end circuit can receive and process multiple radio frequency (RF) signals and output downconverted signals corresponding to these signals. In turn, multiple signal processors can be coupled to this front end. Specifically, a first signal processor can receive and process the downconverted signals to output a first signal obtained from content of a first RF signal, and a second signal processor can receive and process the downconverted signals to output a second signal obtained from content of a second RF signal. In addition, the apparatus may include a detection circuit coupled to the receiver front end circuit to detect presence of at least the second signal and enable the second signal processor responsive to the detected presence.

Abstract translation: 在一个实施例中，接收器前端电路可以接收和处理多个射频（RF）信号并输出​​与这些信号对应的下变频信号。 反过来，多个信号处理器可以耦合到该前端。 具体地，第一信号处理器可以接收并处理下变频信号以输出从第一RF信号的内容获得的第一信号，并且第二信号处理器可以接收并处理下变频信号以输出从第二RF信号的内容获得的第二信号 射频信号。 此外，该装置可以包括耦合到接收器前端电路的检测电路，以检测至少第二信号的存在，并使第二信号处理器能够响应于检测到的存在。

公开(公告)号：US08781421B2

公开(公告)日：2014-07-15

申请号：US13630457

申请日：2012-09-28

Applicant: Silicon Laboratories Inc.

Inventor： Javier Elenes ,  Emmanuel Gautier ,  David Le Goff ,  Dana Taipale

IPC: H04B1/04

CPC classification number: H04B7/0845

Abstract: Systems and methods are disclosed for time-domain diversity combining of radio frequency (RF) broadcast signals. Two channelized quadrature (I/Q) signals are generated by different tuner circuitry coupled to two different antennas, are converted to frequency-domain signals, and are used to generate frequency-domain diversity weighting signals. The frequency-domain diversity weighting signals are then converted to time-domain weights and applied to the channelized I/Q signals. The weighted and channelized I/Q signals are then combined in the time-domain to provide a time-domain diversity combined signal. The resulting combined signal can be further processed, as desired, such as by using a demodulator to generate demodulated output signals. Disclosed methods and systems can be applied to a variety of receiver systems configured to receive RF broadcast signals.

Abstract translation: 公开了射频（RF）广播信号的时域分集组合的系统和方法。 双通道正交（I / Q）信号由耦合到两个不同天线的不同调谐器电路产生，被转换为频域信号，并用于产生频域分集加权信号。 然后将频域分集加权信号转换为时域权重并应用于信道化的I / Q信号。 然后将加权和信道化的I / Q信号在时域中组合以提供时域分集组合信号。 可以根据需要进一步处理所得到的组合信号，例如通过使用解调器来产生解调的输出信号。 公开的方法和系统可以应用于配置成接收RF广播信号的各种接收机系统。