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    CARRIER TRACKING FOR AM IN-BAND ON- CHANNEL RADIO RECEIVERS
    1.
    发明公开
    CARRIER TRACKING FOR AM IN-BAND ON- CHANNEL RADIO RECEIVERS 审中-公开
    车辆跟踪AM波段AUFKANAL无线电接收机

    公开(公告)号：EP1961175A1

    公开(公告)日：2008-08-27

    申请号：EP06837373.7

    申请日：2006-11-10

    申请人： IBIQUITY DIGITAL CORPORATION

    发明人： KROEGER, Brian, W. ,  WANG, Kun

    IPC分类号： H04L27/00

    CPC分类号： H04L27/0014 ,  H04H2201/186 ,  H04L2027/003 ,  H04L2027/0055 ,  H04L2027/0069

    摘要： A method for carrier tracking in AM in-band on-channel radio receivers comprises the steps of receiving an input signal, generating a local oscillator signal in response to an oscillator control signal, mixing the input signal with a local oscillator signal to produce a first signal, filtering the first signal to produce a filtered first signal at a decimated sample rate, detecting the phase error and frequency error of the filtered first signal normalized to mitigate effects of signal fades, and using an adaptive loop filter to produce the oscillator control signal in response to the phase error and frequency error of the filtered first signal. An apparatus that performs the method is also provided.

    METHOD AND APPARATUS FOR DETERMINING TRANSMISSION MODE AND SYNCHRONIZATION FOR A DIGITAL AUDIO BROADCASTING SIGNAL
    3.
    发明授权
    METHOD AND APPARATUS FOR DETERMINING TRANSMISSION MODE AND SYNCHRONIZATION FOR A DIGITAL AUDIO BROADCASTING SIGNAL 有权
    方法和设备的BestimungÜBERTRAGUNGSSMODUS和同步数字音频广播信号

    公开(公告)号：EP1190513B1

    公开(公告)日：2006-12-27

    申请号：EP00943060.4

    申请日：2000-06-22

    申请人： IBIQUITY DIGITAL CORPORATION

    发明人： GOLDSTON, Don, Roy ,  MATHERNE, Marcus, M.

    IPC分类号： H04H1/00 ,  H04L27/26

    CPC分类号： H04L5/0046 ,  H04H20/30 ,  H04H60/07 ,  H04H2201/186 ,  H04H2201/20 ,  H04L1/0071 ,  H04L5/0007

    摘要： A method is provided for transmitting control information in a digital audio broadcasting system. The method comprises the steps of transmitting a plurality of control bits in each of a plurality of control frames, wherein a first sequence of the control bits represents a transmission mode, and a second sequence of the control bits a control data synchronization word. The plurality of control bits can further include a third sequence of bits representative of an interleaver synchronizaton word. A method performed in a radio receiver for determining transmission mode and synchronization for a digital audio broadcasting signal is also provided. The method comprises the steps of receiving a plurality interleaver frames containing digital information, wherein each of the interleaver frames includes a plurality control frames. The control frames include a plurality of control bits, wherein a first sequence of the control bits represents a transmission mode, a second sequence of the control bits a control data synchronization word. The plurality of control bits can further include a third sequence of bits representative of an interleaver synchronization word. The first sequence of control bits is processed to determine a transmission mode; the second sequence of control bits is processed to determine control data synchronization; and the third sequence of control bits is processed to determine interleaver boundaries. Radio frequency transmitters and receivers that utilize the above methods are also disclosed.

    Multistream-in-band-on-channel transmission system
    6.
    发明公开
    Multistream-in-band-on-channel transmission system 有权
    设备中有用频带上的信道传输具有多个数据流

    公开(公告)号：EP1041756A3

    公开(公告)日：2003-02-12

    申请号：EP00302601.0

    申请日：2000-03-29

    申请人： LUCENT TECHNOLOGIES INC.

    发明人： Mansour, David ,  Sinha, Deepen ,  Sundberg, Carl-Erik Wilhelm

    IPC分类号： H04H1/00 ,  H04L5/06 ,  H04L5/02 ,  H04L1/00

    CPC分类号： H04H20/30 ,  H04H60/07 ,  H04H2201/183 ,  H04H2201/186 ,  H04L5/023

    摘要： Methods and apparatus for processing information, e.g., audio, speech, video or image information, for transmission in a communication system. In an illustrative embodiment, a set of bit streams are generated from an audio information signal. The set of bit streams may be, e.g., a total of four bit streams generated by separating each of two multiple description bit streams, corresponding to separate representations of the audio information signal, into first and second class bit streams. The first and second class bit streams associated with the first multiple description bit stream may then be transmitted in respective first and second subbands of a first sideband of an FM host carrier, while the first and second class bit streams associated with the second multiple description bit stream are transmitted in respective first and second subbands of a second sideband of the FM host carrier. The first class bit streams may be provided with a different level of error protection than the second class bit streams, e.g., by utilizing different portions of a non-uniform power profile for the corresponding subbands, or by placement of the bit streams in subbands having different susceptibility to interference. Delay may be introduced between at least a subset of the bit streams in order to provide improved performance, e.g., in the presence of fading.

    METHOD AND APPARATUS FOR DETERMINING TRANSMISSION MODE AND SYNCHRONIZATION FOR A DIGITAL AUDIO BROADCASTING SIGNAL
    7.
    发明公开
    METHOD AND APPARATUS FOR DETERMINING TRANSMISSION MODE AND SYNCHRONIZATION FOR A DIGITAL AUDIO BROADCASTING SIGNAL 有权
    方法和设备的BestimungÜBERTRAGUNGSSMODUS和同步数字音频广播信号

    公开(公告)号：EP1190513A1

    公开(公告)日：2002-03-27

    申请号：EP00943060.4

    申请日：2000-06-22

    申请人： IBIQUITY DIGITAL CORPORATION

    发明人： GOLDSTON, Don, Roy ,  MATHERNE, Marcus, M.

    IPC分类号： H04H1/00 ,  H04L27/26

    CPC分类号： H04L5/0046 ,  H04H20/30 ,  H04H60/07 ,  H04H2201/186 ,  H04H2201/20 ,  H04L1/0071 ,  H04L5/0007

    摘要： A method is provided for transmitting control information in a digital audio broadcasting system. The method comprises the steps of transmitting a plurality of control bits in each of a plurality of control frames, wherein a first sequence of the control bits represents a transmission mode, and a second sequence of the control bits a control data synchronization word. The plurality of control bits can further include a third sequence of bits representative of an interleaver synchronizaton word. A method performed in a radio receiver for determining transmission mode and synchronization for a digital audio broadcasting signal is also provided. The method comprises the steps of receiving a plurality interleaver frames containing digital information, wherein each of the interleaver frames includes a plurality control frames. The control frames include a plurality of control bits, wherein a first sequence of the control bits represents a transmission mode, a second sequence of the control bits a control data synchronization word. The plurality of control bits can further include a third sequence of bits representative of an interleaver synchronization word. The first sequence of control bits is processed to determine a transmission mode; the second sequence of control bits is processed to determine control data synchronization; and the third sequence of control bits is processed to determine interleaver boundaries. Radio frequency transmitters and receivers that utilize the above methods are also disclosed.

    Soft selection combining method in a digital transmission system based on successive erasures of frequency band components
    8.
    发明公开
    Soft selection combining method in a digital transmission system based on successive erasures of frequency band components 有权
    在一个数字传输系统中使用的公共选择的组合方法基于组分在频域中的连续消除

    公开(公告)号：EP1059748A2

    公开(公告)日：2000-12-13

    申请号：EP00304065.6

    申请日：2000-05-15

    申请人： LUCENT TECHNOLOGIES INC.

    发明人： Laneman, Jerry Nicholas ,  Sundberg, Carl-Erik Wilhelm

    IPC分类号： H04H1/00

    CPC分类号： H04L1/0045 ,  H04H20/30 ,  H04H60/11 ,  H04H2201/183 ,  H04H2201/186 ,  H04H2201/20 ,  H04L1/0059 ,  H04L1/0068 ,  H04L1/0071 ,  H04L27/2647

    摘要： Techniques for processing received information in a communication system, such that performance is significantly improved in the presence of certain types of interference. In an illustrative embodiment, first and second digital sidebands are transmitted on either side of an FM or AM host carrier signal in a hybrid in-band on-channel (HIBOC) digital audio broadcasting (DAB) system. The compressed digital audio information in the sidebands is encoded using an outer code, e.g., a cyclic redundancy code (CRC), and an inner code, e.g., a complementary punctured pair convolutional (CPPC) code. A receiver generates an error indicator based at least in part on a first decoding of the received information. The error indicator characterizes interference associated with at least one of the digital sidebands. The receiver then generates at least one alternative decoding of the received information if the error indicator has a designated characteristic. For example, the receiver may generate the alternative decoding by eliminating from consideration in the receiver decoding process a designated portion of at least one of the digital sidebands. The error indicator may be indicative of the presence or absence of a first adjacent interference signal of a particular level within a frequency band associated with one of the sidebands, and may be based on, e.g., a signal-to-noise ratio measurement generated from a pilot tone associated with a given sideband, and/or an error flag generated using the CRC outer code Portions of the given sideband may be eliminated from consideration via successive erasures of sideband components, i.e., subbands, thereby resulting in an increase in the effective code rate of the inner code.

    摘要翻译： 用于处理技术在通信系统中接收到的信息，检测没有性能在某些类型的干扰的存在显着改善。 在一个说明性的实施方式中，第一和第二数字边带中的带内同频（HIBOC）数字音频广播（DAB）系统的混合动力车上的FM或AM主载波信号的任一侧的反式mitted。在所述的压缩的数字音频信息 边带是用在外部码，例如，循环冗余码（CRC）编码，并且在帧内码，例如，互补的一对刺破卷积（CPPC）码。 一种接收机，在生成至少部分地基于对所接收的信息的第一解码错误指示符的速率。 错误指示符表征与数字边带中的至少一个相关联的干扰。 然后，接收机生成速率的所接收的信息的至少一个的替代解码如果错误指示符具有指定的特性。 对于实施例，接收器可以通过从考虑消除在接收机解码处理的数字边带中的至少一个的指定部分生成的替代解码。 错误指示符可指示内与所述边带之一的频带相关的存在或不存在一个特定的电平的第一相邻干扰信号的，并且可以基于，例如，从产生的信噪比测量 与给定的边带相关联，导频音调和/或错误使用给定的边带的CRC外码部分产生标志可以从考虑经由边带分量，即，子带的连续擦除被消除，从而导致在有效地增加 内码的编码率。

    Multiple program decoding for digital audio broardcasting and other applications
    9.
    发明公开
    Multiple program decoding for digital audio broardcasting and other applications 审中-公开
    Mehrfachprogrammdekodierungfürden digitalenHörfunkundfürandere Anwendungen

    公开(公告)号：EP1024617A2

    公开(公告)日：2000-08-02

    申请号：EP00300377.9

    申请日：2000-01-19

    申请人： LUCENT TECHNOLOGIES INC.

    发明人： Sinha, Deepen ,  Sundberg, Carl-Erik Wilhelm

    IPC分类号： H04H1/00

    CPC分类号： H04L1/0083 ,  H04H2201/186 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0065 ,  H04L1/007 ,  H04L1/0071 ,  H04L1/08

    摘要： The invention provides methods and apparatus for decoding multiple program information, e.g., audio, video or image information, in a communication system. In an illustrative embodiment, a multiple program decoder includes a deinterleaver for deinterleaving information corresponding to a set of frames, using a specified deinterleaving length. A given one of the frames includes information from each of at least a subset of the programs, and the frames are encoded using an outer code, e.g., a CRC code, RS code, BCH code or other type of linear block code, and an inner code, e.g., a convolutional code, turbo code or trellis coded modulation. The multiple program decoder includes an inner code decoder for decoding the inner code over one or more of the programs, and an outer code decoder for decoding the outer code for a selected one of the programs. The deinterleaving length of the deinterleaver and operating rate of the inner code decoder can be configured such that the multiple program decoder provides substantially instantaneous tuning within a given cluster of programs, or within a set of clusters each including multiple programs. The programs may, but need not, include jointly-coded audio programs. The invention may be implemented in numerous applications, such as simultaneous multiple program listening and/or recording, simultaneous delivery of audio and data, etc.

    摘要翻译： 本发明提供了用于在通信系统中解码多个节目信息（例如音频，视频或图像信息）的方法和装置。 在说明性实施例中，多程序解码器包括用于使用指定的去交织长度对与一组帧相对应的信息进行解交织的解交织器。 给定的一个帧包括来自节目的至少一个子集中的每一个的信息，并且使用外部码例如CRC码，RS码，BCH码或其他类型的线性块码对帧进行编码，以及 内部代码，例如卷积码，turbo码或网格编码调制。 多重节目解码器包括用于通过一个或多个节目对内部码进行解码的内部码解码器，以及用于解码所选择的一个节目的外部码的外部码解码器。 解码器的解交织长度和内码解码器的操作速率可以被配置为使得多程序解码器在给定的程序集群内或在包括多个程序的一组集群内提供基本上即时的调谐。 程序可以但不必包括联合编码的音频节目。 本发明可以在许多应用中实现，例如同时多节目收听和/或记录，同时传送音频和数据等。