OFDM signal processing method and apparatus

    公开(公告)号:US09602231B2

    公开(公告)日:2017-03-21

    申请号:US14527396

    申请日:2014-10-29

    Applicant: NXP B.V.

    Inventor: Wim van Houtum

    Abstract: The invention provides a reception method and apparatus which provides a series of frequency shifts and filtering operations to sideband signals (lower, upper, and middle), to enable detection if the central part of a signal is analog or digital, and to enable effective co-channel interference compensation. The invention enables (H)IBOC signals for example to be processed with a narrower bandwidth and therefore a lower processing clock speed and complexity is made possible compared to the conventional (H)IBOC-signal processing approach.

    FIRST ADJACENT CANCELLER (FAC) WITH IMPROVED BLENDING USING A PARAMETRIC FILTER
    3.
    发明申请
    FIRST ADJACENT CANCELLER (FAC) WITH IMPROVED BLENDING USING A PARAMETRIC FILTER 有权
    使用参数滤波器改进混合的第一个相似的取景器(FAC)

    公开(公告)号:US20150303956A1

    公开(公告)日:2015-10-22

    申请号:US14257286

    申请日:2014-04-21

    Abstract: A method for processing a radio signal includes: receiving an FM in-band on-channel radio signal including a plurality of digitally modulated subcarriers in upper and lower sidebands; sampling the FM in-band on-channel radio signal to produce an input signal including complex digital samples of a combination of a desired one the upper and lower sidebands and an FM interferer; removing FM interferer components from the first signal by notch filtering to produce a notch-filtered signal; weighting the notch-filtered signal to produce a weighted notch-filtered signal; using a parametric filter to filter the input signal to produce a parametric-filtered input signal; and combining the weighted notch-filtered signal and the parametric-filtered input signal to produce an output signal. A radio receiver that implements the method is also included.

    Abstract translation: 一种处理无线电信号的方法包括:在上边带和下边带中接收包括多个数字调制子载波的FM带内通道无线电信号; 对FM带内通道无线电信号进行采样以产生包括上边带和下边带期望的一个组合的复数数字采样和FM干扰源的输入信号; 通过陷波滤波从第一信号中去除FM干扰源分量以产生陷波滤波信号; 加权陷波滤波信号以产生加权陷波滤波信号; 使用参数滤波器对输入信号进行滤波以产生参数滤波的输入信号; 以及组合加权陷波滤波信号和参数滤波输入信号以产生输出信号。 还包括实现该方法的无线电接收机。

    Radio service registry
    4.
    发明授权
    Radio service registry 有权
    无线电服务注册

    公开(公告)号:US08521079B2

    公开(公告)日:2013-08-27

    申请号:US11962752

    申请日:2007-12-21

    Abstract: A service registry for a radio broadcasting system includes a memory for storing information relating to services to be provided over the broadcasting system, a processor coupled to the memory, and a core interface for exchanging messages between the processor and a plurality of users, the processor being programmed to retrieve the information from the memory in response to the messages received on the interface, and to output the retrieved information to an importer. A method of broadcasting and a broadcasting system are also provided.

    Abstract translation: 用于无线电广播系统的服务注册表包括用于存储与要在广播系统上提供的服务有关的信息的存储器,耦合到存储器的处理器和用于在处理器和多个用户之间交换消息的核心接口,处理器 被编程为响应于接口上接收到的消息从存储器检索信息,并将检索到的信息输出到进口商。 还提供了广播方法和广播系统。

    System for high definition radio blending
    6.
    发明授权
    System for high definition radio blending 有权
    高分辨率无线电混合系统

    公开(公告)号:US07953183B2

    公开(公告)日:2011-05-31

    申请号:US11454997

    申请日:2006-06-16

    Abstract: A system for blending a hybrid radio signal provides reduced volume level transitions during blending from an analog component of the hybrid signal to the digital component by adjusting blend and cross-fade variables, as well as setting a hysteresis mode to prevent undesirable jumping from digital mode back to analog mode sequentially. The system also compensates for digital AM frequency quality issues by adjusting a filter bandwidth when the transceiver blends the AM signal from analog to digital mode.

    Abstract translation: 用于混合混合无线电信号的系统通过调整混合和交叉衰减变量来提供从混合信号的模拟分量到数字分量的混合期间的减小的体积电平转换,以及设置滞后模式以防止不期望的从数字模式跳跃 依次回到模拟模式。 当收发器将AM信号从模拟模式混合到一起时,该系统还通过调整滤波器带宽来补偿数字AM频率质量问题。

    Audio correlation system for high definition radio blending
    7.
    发明授权
    Audio correlation system for high definition radio blending 有权
    用于高分辨率无线电混合的音频相关系统

    公开(公告)号:US07944998B2

    公开(公告)日:2011-05-17

    申请号:US11583966

    申请日:2006-10-18

    Abstract: A system that blends a hybrid radio signal may provide reduced audio content skipping and may determine an audio correlation between analog and digital signal components in the hybrid radio signal before blending from the analog signal component to the digital signal component. The system may reduce volume level transitions during blending by adjustment of blend and cross-fade variables, as well as setting a hysteresis mode to prevent undesirable sequential jumping from digital mode back to analog mode. The system also may compensate for digital AM frequency quality issues by adjustment of a filter bandwidth when the receiver blends an AM signal from analog to digital mode.

    Abstract translation: 混合混合无线电信号的系统可以提供减少的音频内容跳过,并且可以在从模拟信号分量到数字信号分量混合之前确定混合无线电信号中的模拟和数字信号分量之间的音频相关性。 该系统可以通过调整混合和交叉渐变变量来减少混合期间的音量级别转换,以及设置滞后模式,以防止从数字模式回到模拟模式的不期望的顺序跳转。 当接收机将AM信号从模拟模式混合到一起时,该系统还可以通过调整滤波器带宽来补偿数字AM频率质量问题。

    Method For Streaming Through A Data Service Over A Radio Link Subsystem
    8.
    发明申请
    Method For Streaming Through A Data Service Over A Radio Link Subsystem 有权
    通过无线电链路子系统通过数据服务流式传输的方法

    公开(公告)号:US20090157412A1

    公开(公告)日:2009-06-18

    申请号:US11958783

    申请日:2007-12-18

    Abstract: An apparatus for controlling a data rate in a data client for a digital audio broadcasting system includes a buffer for storing data, a codec for coding data, and a control module for controlling a bit rate of the codec in response to a level of the data in the buffer. A method performed by the apparatus is also included.

    Abstract translation: 一种用于控制数字音频广播系统的数据客户端中的数据速率的装置包括:用于存储数据的缓冲器,用于编码数据的编解码器,以及用于响应于数据级别控制编解码器的比特率的控制模块 在缓冲区。 还包括由该装置执行的方法。

    Medium loss high power IBOC combiner
    9.
    发明申请
    Medium loss high power IBOC combiner 有权
    中档高功率IBOC组合器

    公开(公告)号:US20090041157A1

    公开(公告)日:2009-02-12

    申请号:US12217812

    申请日:2008-07-09

    Applicant: Derek J. Small

    Inventor: Derek J. Small

    CPC classification number: H04L27/12 H04H20/30 H04H20/46 H04H2201/183

    Abstract: A method and apparatus are disclosed for combining digital sidebands with an FM analog signal for IBOC transmission by a single antenna. Specifically, a high power filter combiner for combining an FM analog and a digital signal of the same channel, or frequency, is disclosed. The combiner has two inputs that respectively receive an FM analog and a digital signal to be transmitted in the same FM channel. The combiner has mild tuned filters interposed between the inputs and the output which are tuned to pass the FM analog signal while reflecting the digital signal such that the passed FM analog signal and the reflected digital signal combine as IBOC, i.e., an FM analog signal with digital sideband signals. The combined IBOC signal is provided at an output of the combiner, capable for transmission through a single antenna.

    Abstract translation: 公开了一种用于将数字边带与FM模拟信号组合以通过单个天线进行IBOC传输的方法和装置。 具体地,公开了用于组合FM模拟和相同信道或频率的数字信号的高功率滤波器组合器。 组合器有两个输入,分别接收FM模拟信号和数字信号以在相同的FM信道中传输。 组合器具有介于输入和输出之间的温和调谐滤波器,其被调谐以通过FM模拟信号同时反映数字信号,使得经过的FM模拟信号和反射数字信号组合为IBOC,即FM模拟信号与 数字边带信号。 组合的IBOC信号提供在组合器的输出端,能够通过单个天线进行传输。

    Network radio receiver
    10.
    发明申请
    Network radio receiver 有权
    网络无线电接收机

    公开(公告)号:US20080130686A1

    公开(公告)日:2008-06-05

    申请号:US11634045

    申请日:2006-12-04

    Applicant: Marek Milbar

    Inventor: Marek Milbar

    Abstract: An apparatus includes a network receiver for receiving an over-the-air in-band on-channel broadcast signal and extracting broadcast content from the broadcast signal, and an output for delivering the content by way of a first receiver output signal to a plurality of network player devices. A method performed by the apparatus is also included.

    Abstract translation: 一种装置包括:网络接收器,用于接收空中带内在线广播信号并从广播信号中提取广播内容;以及输出端,用于通过第一接收机输出信号将内容传送到多个 网络播放器设备。 还包括由该装置执行的方法。

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