公开(公告)号：WO2004107603A2

公开(公告)日：2004-12-09

申请号：PCT/FR2004001296

申请日：2004-05-25

Applicant: TELEDIFFUSION FSE ,  LANOISELEE MARC ,  LOUIN PIERRICK

Inventor： LANOISELEE MARC ,  LOUIN PIERRICK

IPC: H04H20/46 ,  H04L27/26 ,  H04B7/00

CPC classification number: H04H20/46 ,  H04H20/22 ,  H04H2201/12 ,  H04H2201/186 ,  H04L27/2601

Abstract: The invention relates to a radio broadcast method for a multi-carrier digital signal (51), occupying a first frequency band adjacent to at least one second frequency band, each allocated for a second signal (52, 53), said, or at least one of said second signals being an analogue radio broadcast signal. A pre-filtering (54, 55) is applied to the first signal before the transmission thereof, such as to attenuate the power of said first signal at least in a first portion of said first frequency band, adjacent to the second frequency band(s).

Abstract translation: 本发明涉及一种用于多载波数字信号（51）的无线电广播方法，该多载波数字信号占用与至少一个第二频带相邻的第一频带，每个分配给第二信号（52,53），或至少 所述第二信号之一是模拟无线电广播信号。 在其发送之前对第一信号应用预滤波（54,55），例如至少在与第二频带相邻的所述第一频带的第一部分中衰减所述第一信号的功率 ）。

公开(公告)号：WO00079712A1

公开(公告)日：2000-12-28

申请号：PCT/US2000/017189

申请日：2000-06-22

IPC: H04J11/00 ,  H04H20/46 ,  H04L1/00 ,  H04L27/26 ,  H04H1/00

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

Abstract: 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.

Abstract translation: 提供一种在数字音频广播系统中发送控制信息的方法。 该方法包括以下步骤：在多个控制帧中的每一个中发送多个控制位，其中控制位的第一序列表示传输模式，控制位的第二序列表示控制数据同步字。 多个控制位还可以包括表示交织器同步字的第三比特序列。 还提供了一种用于确定数字音频广播信号的传输模式和同步的无线电接收机中执行的方法。 该方法包括以下步骤：接收包含数字信息的多个交织器帧，其中每个交织器帧包括多个控制帧。 控制帧包括多个控制位，其中控制位的第一序列表示传输模式，控制位的第二序列是控制数据同步字。 多个控制位还可以包括表示交织器同步字的第三比特序列。 控制位的第一序列被处理以确定传输模式; 控制位的第二序列被处理以确定控制数据同步; 并且处理第三个控制位序列以确定交织器边界。 还公开了利用上述方法的射频发射机和接收机。

公开(公告)号：WO1996021291A1

公开(公告)日：1996-07-11

申请号：PCT/US1995016024

申请日：1995-12-12

Applicant: NORTHROP GRUMMAN CORPORATION

Inventor： NORTHROP GRUMMAN CORPORATION ,  DAPPER, Mark, J. ,  GEILE, Michael, J. ,  CARLIN, Barry, W.

IPC: H04H01/00

CPC classification number: H03C1/52 ,  H04H20/30 ,  H04H20/36 ,  H04H2201/186

Abstract: A digital signal transmission system is provided which minimizes the analog AM signal envelope distortion caused by multiple digitally modulated carriers in the same band as the analog AM signal. The present transmission system includes means for transmitting an amplitude modulated signal. Digital carriers for the digital signal are placed both above and below the frequency of the analog AM carrier. Certain digital carriers that are above the frequency of the analog AM carrier have an associated digital carrier that is at an equal frequency offset below the analog AM carrier. The data and modulation placed on the upper digital carrier and its counterpart are such that the signal resulting from their addition has no component that is in-phase with the analog AM carrier. Digital carrier pairs arranged in this way are said to be complementary. This configuration delivers dramatic fidelity improvements to analog AM reception of AM compatible digital braodcast signals. An additional means of reducing envelope distorsion is to predistort the signal envelope. The signal envelope is predistorted to counteract the distortion added by the digital carriers.

Abstract translation: 提供一种数字信号传输系统，其最小化由与模拟AM信号相同的频带中的多个数字调制载波引起的模拟AM信号包络失真。 本传输系统包括用于发送幅度调制信号的装置。 用于数字信号的数字载波被放置在模拟AM载波的频率之上和之下。 高于模拟AM载波频率的某些数字载波具有与模拟AM载波相同频率偏移的相关联的数字载波。 放置在上数字载波及其对应物上的数据和调制使得由它们的相加产生的信号没有与模拟AM载波同相的分量。 以这种方式布置的数字载体对被认为是互补的。 该配置为AM兼容数字编织信号的模拟AM接收提供了显着的保真度改进。 减少信封变形的另外一种手段是预测信号包络。 信号包络是预失真的，以抵消由数字载体添加的失真。

公开(公告)号：WO2010014226A1

公开(公告)日：2010-02-04

申请号：PCT/US2009/004387

申请日：2009-07-30

Applicant: IBIQUITY DIGITAL CORPORATION ,  PAHUJA, Ashwini

Inventor： PAHUJA, Ashwini

IPC: G06F17/00

CPC classification number: H04L5/06 ,  H04H20/30 ,  H04H60/12 ,  H04H2201/183 ,  H04H2201/186 ,  H04L27/02 ,  H04L27/10 ,  H04L27/2601

Abstract: Methods and systems are disclosed for temporally aligning audio samples of digital and analog portions of a radio broadcast signal. The methods and systems comprise the steps of receiving a radio broadcast signal having analog and digital portions, producing audio samples of the analog and digital portions, retrieving a stored first time interval corresponding to an approximate time for the digital samples to traverse a receiver digital signal path, measuring a second time for data representing the digital portion to travel from a digital signal path input to a digital demodulator, generating temporal alignment of the digital audio samples relative to the analog audio samples by delaying the digital audio samples by the sum of the first and second times, temporally aligning the digital and analog samples to within a predetermined amount, and digitally combining the first and second audio samples to produce a combined audio output

Abstract translation: 公开了时间上对准无线电广播信号的数字和模拟部分的音频样本的方法和系统。 所述方法和系统包括以下步骤：接收具有模拟和数字部分的无线电广播信号，产生模拟和数字部分的音频样本，检索对应于数字样本的近似时间的所存储的第一时间间隔以遍历接收机数字信号 路径，第二次测量表示数字部分从数字信号路径输入到数字解调器的数据的数据，通过将数字音频样本的和的延迟量相对于模拟音频样本产生数字音频样本的时间对准 第一次和第二次，将数字和模拟样本在时间上对齐到预定量，并且数字地组合第一和第二音频样本以产生组合音频输出

公开(公告)号：WO2008150910A2

公开(公告)日：2008-12-11

申请号：PCT/US2008065145

申请日：2008-05-29

Applicant: IBIQUITY DIGITAL CORP ,  PEYLA PAUL J ,  KROEGER BRIAN W

Inventor： PEYLA PAUL J ,  KROEGER BRIAN W

IPC: H04H20/30

CPC classification number: H04L5/06 ,  H04H2201/186 ,  H04L1/20

Abstract: A method for detecting a digital radio signal includes the steps of receiving the digital radio signal including a series of symbols, developing a correlation waveform having a peak that corresponds to a symbol boundary, normalizing the correlation waveform, and calculating a peak value of the normalized correlation waveform, wherein the peak value represents the quality of the received digital radio signal. A receiver that performs the method is also provided.

Abstract translation: 一种用于检测数字无线电信号的方法包括以下步骤：接收包括一系列符号的数字无线电信号，产生具有对应于符号边界的峰值的相关波形，对相关波形进行归一化，以及计算正规化 相关波形，其中峰值表示所接收的数字无线电信号的质量。 还提供了执行该方法的接收器。

公开(公告)号：WO2006056528A1

公开(公告)日：2006-06-01

申请号：PCT/EP2005/055795

申请日：2005-11-07

Applicant: TDF ,  JAHAN, Bruno ,  LOUIN, Pierrick ,  URCUN, Pierre

Inventor： JAHAN, Bruno ,  LOUIN, Pierrick ,  URCUN, Pierre

IPC: H04H1/00

CPC classification number: H04H20/30 ,  H04H20/22 ,  H04H20/72 ,  H04H2201/12 ,  H04H2201/186

Abstract: L'invention concerne un procédé de diffusion d'un signal numérique transmis au voisinage d'un signal analogique portant un signal audio source modulant l'amplitude d'une porteuse AM. Selon l'invention, un tel procédé comprend une étape de modulation en amplitude dans le domaine fréquentiel du signal numérique par un signal de masquage représentatif d'une courbe de masquage psycho-acoustique du signal audio source.

Abstract translation: 本发明涉及一种用于广播在携带调制AM载波的振幅的源音频信号的模拟信号附近发送的数字信号的方法。 根据本发明，该方法包括通过表示源音频信号的心理声学屏蔽曲线的掩蔽信号执行的数字信号的频域中的幅度调制步骤。

公开(公告)号：WO1997008877A1

公开(公告)日：1997-03-06

申请号：PCT/US1996013526

申请日：1996-08-21

Applicant: USA DIGITAL RADIO PARTNERS, L.P.

Inventor： USA DIGITAL RADIO PARTNERS, L.P. ,  CARLIN, Barry, W. ,  DAPPER, Mark, J. ,  GEILE, Michael, J.

IPC: H04L27/06

CPC classification number: H03D1/2245 ,  H04H2201/186 ,  H04L27/265

Abstract: The invention provides a method and apparatus for demodulating a composite AM DAB waveform which contains digitally modulated carriers and which employ a mixer (180) for converting a received signal (170) into two signals, the first of these signals represents an in-phase component and the second of the signals represents a quadrature component, two analog-to-digital converters (182, 184) for converting the two signals into digital signals, and two fast Fourier transform elements (188, 190) for extracting data separately from the two digital signals. Complementary digital carrier signals are recovered from the quadrature, and non-complementary digital carriers are derived from a sum of the complementary data and the output of the in-phase component FFT process. Leakage of the AM signal through a highpass filter (186) is prevented from interfering with the demodulation of the complementary carrier signal's use of separated demodulation channels.

Abstract translation: 本发明提供了一种用于解调包含数字调制载波的复合AM DAB波形的方法和装置，其采用用于将接收信号（170）转换为两个信号的混频器（180），这些信号中的第一个表示同相分量 并且第二个信号表示正交分量，用于将两个信号转换成数字信号的两个模数转换器（182,184）和用于从两个信号分开提取数据的两个快速傅里叶变换元件（188,190） 数字信号。 从正交中恢复互补数字载波信号，并且从互补数据和同相分量FFT处理的输出之和导出非互补数字载波。 防止AM信号通过高通滤波器（186）的泄漏干扰互补载波信号对分离的解调信道的使用的解调。

公开(公告)号：WO2009099871A1

公开(公告)日：2009-08-13

申请号：PCT/US2009/032365

申请日：2009-01-29

Applicant: IBIQUITY DIGITAL CORPORATION ,  KROEGER, Brian, William

Inventor： KROEGER, Brian, William

IPC: H04L1/00 ,  H04L27/00 ,  H04L5/00

CPC classification number: H04L1/006 ,  H04B1/406 ,  H04H20/30 ,  H04H40/18 ,  H04H60/12 ,  H04H2201/186 ,  H04L1/0069 ,  H04L1/0071 ,  H04L27/2601 ,  H04L27/2602 ,  H04L27/3405

Abstract: A method of broadcasting an AM compatible digital audio broadcasting signal includes: producing an analog modulated carrier signal centrally positioned in a radio channel, wherein the analog modulated carrier signal is modulated by an analog signal, producing a plurality of digitally modulated subcarrier signals in the radio channel, wherein the digitally modulated subcarrier signals are modulated using complementary pattern-mapped trellis code modulation (CPTCM) including a code mapped to overlapping partitions including an upper main partition, a lower main partition, an upper backup partition and a lower backup partition, and a non-overlapping tertiary partition, and transmitting the analog modulated carrier signal and the plurality of digitally modulated subcarrier signals. Transmitters that broadcast the signal and receivers that receive the signal, and the reception method are also included.

Abstract translation: 一种广播AM兼容数字音频广播信号的方法包括：产生中心位于无线电信道中的模拟调制载波信号，其中模拟调制载波信号由模拟信号调制，在无线电中产生多个经数字调制的子载波信号 信道，其中使用包括映射到包括上主分区，下主分区，上备份分区和下备份分区的重叠分区的代码的互补模式映射网格码调制（CPTCM）来调制数字调制副载波信号，以及 不重叠的三级分区，并且发送模拟调制载波信号和多个数字调制副载波信号。 广播接收信号的信号的发射机和接收方法也包括在内。

公开(公告)号：WO2009045846A2

公开(公告)日：2009-04-09

申请号：PCT/US2008/077670

申请日：2008-09-25

Applicant: IBIQUITY DIGITAL CORPORATION ,  CHALMERS, Harvey ,  MICHAELS, Robert

Inventor： CHALMERS, Harvey ,  MICHAELS, Robert

IPC: H04B17/00 ,  H04L27/00 ,  H04L27/28

CPC classification number: H04B17/0085 ,  H04H20/12 ,  H04H20/30 ,  H04H60/07 ,  H04H2201/183 ,  H04H2201/186 ,  H04L5/0007

Abstract: A signal generator includes a memory for storing content information in the form of vectors including in-phase and quadrature elements of an orthogonal frequency division multiplexing waveform, a processor for converting the vectors to a radio frequency signal, and a logic device for controlling the operation of the memory and the processor. The in-phase and quadrature elements represent baseband content of the orthogonal frequency-division multiplexing waveform.

Abstract translation: 信号发生器包括：存储器，用于以包括正交频分复用波形的同相和正交元件的向量形式存储内容信息;处理器，用于将向量转换为射频信号; 以及用于控制存储器和处理器的操作的逻辑装置。 同相和正交分量表示正交频分复用波形的基带内容。

公开(公告)号：WO2006110229A1

公开(公告)日：2006-10-19

申请号：PCT/US2006/007236

申请日：2006-03-01

Applicant: IBIQUITY DIGITAL CORPORATION ,  IANNUZZELLI, Russell ,  KROEGER, Brian, William ,  CHALMERS, Harvey

Inventor： IANNUZZELLI, Russell ,  KROEGER, Brian, William ,  CHALMERS, Harvey

IPC: H04H1/00

CPC classification number: H04H20/30 ,  H04H20/12 ,  H04H2201/183 ,  H04H2201/186

Abstract: This invention provides a method of detecting time alignment of an analog audio signal and a digital audio signal in a hybrid radio system. The method comprises the steps of filtering the analog audio signal to produce a filtered analog audio signal, filtering the digital audio signal to produce a filtered digital audio signal, and using the filtered analog audio signal and the filtered digital audio signal to calculate a plurality of correlation coefficients, wherein the correlation coefficients are representative of time alignment between the analog audio signal and the digital audio signal. An apparatus for performing the method is also provided.

Abstract translation: 本发明提供一种在混合无线电系统中检测模拟音频信号和数字音频信号的时间对准的方法。 该方法包括以下步骤：对模拟音频信号进行滤波以产生经滤波的模拟音频信号，对数字音频信号进行滤波以产生经滤波的数字音频信号，并使用滤波的模拟音频信号和滤波后的数字音频信号来计算多个 相关系数，其中相关系数表示模拟音频信号和数字音频信号之间的时间对准。 还提供了一种用于执行该方法的装置。