公开(公告)号：US20070287398A1

公开(公告)日：2007-12-13

申请号：US11808518

申请日：2007-06-11

Applicant: Osamu Mino

Inventor： Osamu Mino

IPC: H04B1/16

CPC classification number: H04B1/26 ,  H03G3/3068 ,  H04H40/45 ,  H04H2201/183 ,  H04H2201/186

Abstract: An object of the present invention is to provide a radio receiver and a method for detecting carrier waves which make it possible to detect carrier waves for an IBOC type hybrid broadcast reliably. A radio receiver for receiving carrier waves for hybrid broadcasts which are arranged so as to be adjacent to and located on both sides of carrier waves for analog broadcasts in frequency bands includes a tuner for tuning to a broadcast frequency, and a controller for setting a center frequency of shift frequency in a range where carrier waves for an analog broadcast can be detected and allowing the tuner to tune to the set shift frequency.

Abstract translation: 本发明的目的是提供一种用于检测载波的无线电接收机和方法，其可以可靠地检测IBOC型混合广播的载波。 一种用于接收用于混合广播的载波的无线电接收机，其包括用于调谐到广播频率的调谐器，以及用于设置中心的控制器，其被配置为邻近并位于用于频带中的模拟广播的载波的两侧， 在可以检测模拟广播的载波的范围内的移位频率的频率，并允许调谐器调谐到设定的移位频率。

公开(公告)号：US06904264B1

公开(公告)日：2005-06-07

申请号：US09713736

申请日：2000-11-15

Applicant: Gene A. Frantz

Inventor： Gene A. Frantz

IPC: H04H60/17 ,  H04H60/21 ,  H04H60/27 ,  H04H1/00

CPC classification number: H04H60/21 ,  H04H60/17 ,  H04H60/27 ,  H04H2201/183 ,  H04H2201/20 ,  H04H2201/30 ,  H04H2201/37 ,  H04H2201/50

Abstract: The user receives a digital radio transmission through a digital receiver and transmits a request to download selected content from this transmission to a content agent, an entity responsible for authorizing the authorized downloading of the digital content. If the content is not free of charge, the user also transmits sufficient information to allow for payment for the digital. The user then receives a transmission authorizing the downloading of the digital content from the content agent upon acceptance of the payment by the content agent. The user then downloads the content to a storage device which is coupled to the receiver.

Abstract translation: 用户通过数字接收机接收数字无线电传输，并将从该传输中下载所选内容的请求发送给负责授权下载数字内容的内容代理。 如果内容不是免费的，则用户还发送足够的信息以允许数字付款。 然后，用户在接受内容代理的支付时接收授权从内容代理下载数字内容的传输。 然后，用户将内容下载到耦合到接收器的存储设备。

公开(公告)号：US06792051B1

公开(公告)日：2004-09-14

申请号：US09626295

申请日：2000-07-25

Applicant: Chandra Mohan ,  Zhiming Zhang ,  Manuel Apraez

Inventor： Chandra Mohan ,  Zhiming Zhang ,  Manuel Apraez

IPC: H03D100

CPC classification number: H04H20/30 ,  H04H2201/183

Abstract: An FM broadcast transmitter transmits a broadcast signal having a carrier at a broadcast frequency and sidebands, able to be transmitted at full power, within a transmission band-width around the carrier. It includes a source of a modulated FM stereo signal having a carrier at the broadcast frequency and having sidebands with a bandwidth less than the transmission bandwidth representing a stereo signal. It also includes a source of a modulated IBOC signal, having carrier pulses spaced relative to each other to represent the IBOC digital data signal encoded as a variable pulse width encoded signal, and a bandwidth within the transmission bandwidth not overlapping the FM stereo signal sidebands. A signal combiner combines the modulated FM stereo signal and the modulated IBOC signal to form the broadcast signal. An FM broadcast receiver receives a broadcast signal including a first modulated signal representing an FM stereo signal, and a second modulated signal, having carrier pulses spaced relative to each other to represent an in-band-on-channel (IBOC) digital data signal encoded as a variable pulse width encoded signal. It includes a signal separator for generating a first separated signal representing the FM stereo signal and a second separated signal representing the IBOC digital data signal. An FM signal processor generates a stereo audio signal represented by the FM stereo signal. An IBOC signal processor generates a digital data signal represented by the IBOC digital data signal.

Abstract translation: FM广播发射机以广播频率的载波和能够以全功率发送的载波周围的传输带宽内的广播信号发送广播信号。 它包括具有广播频率的载波的调制FM立体声信号的源，并且具有小于表示立体声信号的传输带宽的带宽的边带。 它还包括经调制的IBOC信号的源，其具有相对于彼此间隔开的载波脉冲，以表示被编码为可变脉冲宽度编码信号的IBOC数字数据信号，以及不与FM立体声信号边带重叠的传输带宽内的带宽。 信号组合器组合调制的FM立体声信号和调制的IBOC信号以形成广播信号。FM广播接收机接收包括表示FM立体声信号的第一调制信号的广播信号和具有相对间隔的载波脉冲的第二调制信号 以表示被编码为可变脉冲宽度编码信号的带通上（IBOC）数字数据信号。 它包括用于产生表示FM立体声信号的第一分离信号的信号分离器和表示IBOC数字数据信号的第二分离信号。 FM信号处理器产生由FM立体声信号表示的立体声音频信号。 IBOC信号处理器生成由IBOC数字数据信号表示的数字数据信号。

公开(公告)号：US20040022229A1

公开(公告)日：2004-02-05

申请号：US10210143

申请日：2002-07-31

Inventor： Philip H. Vanness

IPC: H04J001/00

CPC classification number: H04L1/0036 ,  H04H20/30 ,  H04H2201/183 ,  H04H2201/20 ,  H04L5/0005 ,  H04L27/2647

Abstract: A method for processing a composite digital audio broadcasting signal including an analog modulated portion in a central frequency band and digitally modulated portions in upper and lower sidebands with respect to the central frequency band, the method comprises the steps of wideband filtering the composite digital audio broadcasting signal to produce a first intermediate frequency signal, narrowband filtering the composite digital audio broadcasting signal to produce a second intermediate frequency signal, simultaneously processing the first intermediate frequency signal to retrieve a digitally modulated version of program material from the first intermediate frequency signal, and processing the second intermediate frequency signal to retrieve an analog modulated version of the program material from the second intermediate frequency signal, making a determination of the quality of the digitally modulated version of program material, and using the quality determination to select the analog modulated version of the program material, the digitally modulated version of program material, or a combination of the analog modulated version of the program material and the digitally modulated version of program material as an output signal. Receivers that process a digital audio broadcasting signal using the method are also disclosed.

Abstract translation: 一种用于处理包括中央频带中的模拟调制部分和相对于中心频带的上边带和下边带中的数字调制部分的复合数字音频广播信号的方法，所述方法包括以下步骤：对复合数字音频广播进行宽带滤波 信号以产生第一中频信号，窄带滤波复合数字音频广播信号以产生第二中频信号，同时处理第一中频信号以从第一中频信号中检索节目素材的数字调制版本，以及处理 所述第二中频信号从所述第二中频信号中检索所述节目素材的模拟调制版本，确定所述节目素材的数字调制版本的质量，并且使用所述质量确定来选择所述节目素材 节目素材的调制版本，节目素材的数字调制版本，或节目素材的模拟调制版本和作为输出信号的数字调制版本的节目素材的组合。 还公开了使用该方法处理数字音频广播信号的接收机。

公开(公告)号：US5956624A

公开(公告)日：1999-09-21

申请号：US274140

申请日：1994-07-12

Applicant: Bill J. Hunsinger ,  Derek D. Kumar

Inventor： Bill J. Hunsinger ,  Derek D. Kumar

IPC: H04B1/40 ,  H04B1/707 ,  H04H20/30 ,  H04H20/33 ,  H04J9/00 ,  H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04L5/02 ,  H04L27/26 ,  H04B7/26

CPC classification number: H04L27/2601 ,  H04B1/406 ,  H04B1/707 ,  H04H20/30 ,  H04H20/33 ,  H04J13/004 ,  H04J13/12 ,  H04J9/00 ,  H04L5/023 ,  H04H2201/17 ,  H04H2201/183 ,  H04J2013/0037

Abstract: Apparatus and method for transmitting a digitized wideband signal robust to multipath degradation and intersymbol interference within a predetermined broadcast band. A basis set of wideband mutually orthogonal pseudorandom basis signal waveforms of substantially equal length and having predetermined autocorrelation values and a predetermined spectral shape are generated. The length of the waveforms in the set represents a baud. The wideband waveforms of the basis set are data modulated so as to define digital data. The basis set substantially maintains the predetermined spectral shape during the modulation.

Abstract translation: 用于在预定广播频带内发送鲁棒的多径衰落和码间干扰的数字化宽带信号的装置和方法。 产生具有基本相等长度并具有预定自相关值和预定光谱形状的宽带相互正交的伪随机基准信号波形的基本集合。 集合中波形的长度表示波特率。 基准集合的宽带波形被数据调制以便定义数字数据。 该基组在调制期间基本保持预定的光谱形状。

公开(公告)号：US5838799A

公开(公告)日：1998-11-17

申请号：US453564

申请日：1995-05-26

Applicant: John M. Cioffi ,  John A. C. Bingham ,  Mark P. Mallory

Inventor： John M. Cioffi ,  John A. C. Bingham ,  Mark P. Mallory

IPC: H04B1/16 ,  H04B1/30 ,  H04H20/30 ,  H04H60/73 ,  H04J1/00 ,  H04J1/14 ,  H04J11/00 ,  H04L5/02 ,  H04L27/26 ,  H04H5/00 ,  H04H1/00

CPC classification number: H04L27/2602 ,  H04B1/16 ,  H04B1/30 ,  H04H20/30 ,  H04J1/14 ,  H04L5/023 ,  H04H2201/183 ,  H04H60/73

Abstract: A method and apparatus for transmitting digital sound is disclosed. The method contemplates transmitting a digital radio signal (such as an FM band signal) over a plurality of sub-channels subject to some constraints on the digital signal power. A control sub-channel, sometimes referred to as an auxiliary overhead channel is used to transmit control information which is interpreted by the receiver to identify the location and potentially the mode of the digital signals.

Abstract translation: 公开了一种用于传输数字声音的方法和装置。 该方法考虑在数字信号功率受到一些约束的情况下在多个子信道上发送数字无线电信号（例如FM频带信号）。 有时称为辅助开销信道的控制子信道用于发送接收机解释的控制信息，以识别数字信号的位置和潜在的模式。

公开(公告)号：US5745525A

公开(公告)日：1998-04-28

申请号：US485599

申请日：1995-06-07

Applicant: Bill J. Hunsinger ,  Derek D. Kumar

Inventor： Bill J. Hunsinger ,  Derek D. Kumar

IPC: H04B1/40 ,  H04B1/707 ,  H04H20/30 ,  H04H20/33 ,  H04J9/00 ,  H04J11/00 ,  H04J13/00 ,  H04J13/12 ,  H04L5/02 ,  H04L27/26 ,  H04B15/00

CPC classification number: H04L27/2601 ,  H04B1/406 ,  H04B1/707 ,  H04H20/30 ,  H04H20/33 ,  H04J13/004 ,  H04J13/12 ,  H04J9/00 ,  H04L5/023 ,  H04H2201/17 ,  H04H2201/183 ,  H04J2013/0037

Abstract: A system and method for transmitting digital information through a medium such as atmospheric free-space includes a transmitter which generates a signal based on a basis set of mutually orthogonal, spectrally-shaped, sequences of substantially equal length and having predetermined autocorrelation values. The sequences may resemble noise in at least some of their characteristics. The orthogonality or cross-correlation characteristics, the autocorrelation characteristics and the resemblance to noise are due to features derived from sequences of pseudo-random numbers which themselves resemble noise in at least some of their characteristics. The waveform set based on the sequences is modulated digitally. The modulated set may be summed together along with a wideband reference signal of reduced amplitude and optionally an FM analog signal to form a composite signal which is broadcast typically through free space to at least one receiver. The receiver separates the analog FM signal from the digital signal and thereafter demodulates the digital data-carrying waveforms and outputs a stream of digital data. It has been determined to be resistant to multipath degradation.

公开(公告)号：US5278844A

公开(公告)日：1994-01-11

申请号：US683918

申请日：1991-04-11

Applicant: John L. Murphy ,  Mark J. Rich

Inventor： John L. Murphy ,  Mark J. Rich

IPC: H04H20/31 ,  H04H20/95 ,  H04H40/18 ,  H04H40/54 ,  H04H60/07 ,  H04L1/00 ,  H04L27/26 ,  G06F11/08 ,  H04L1/04

CPC classification number: H04H60/07 ,  H04H20/31 ,  H04H20/95 ,  H04H40/18 ,  H04L1/0057 ,  H04L1/0071 ,  H04L27/2601 ,  H04H2201/183 ,  H04H40/54 ,  H04L2001/0093

Abstract: A radio broadcasting system is provided for transmitting and receiving through free space a fully coherent multicarrier modulated digital signal which is especially adapted to be resistive to multipath degradation. The multicarrier modulated signal is a synthesized vector-modulated signal which is a quadrature phase shift keyed (QPSK) modulated set of synthesized carriers phase coherent with each other and each occupying a spectrum replicated multiple times within a bandwidth with no more than two bits per vector. An efficient channel coding consisting of large block size, high efficiency block coding, such as BCH 255, 239 code, is employed in connection with time interleaving of bits to mitigate the effects of frequency selective multipath and broadband multipath. The broadcast system is designed to be used in support of compressed digital audio programming material. In a demodulation process according to the invention, a demodulator is operative to phase lock to a reconstructed or otherwise coherent pilot tone or equivalent clock, to coherently demodulate the digital signal, to deinterleave, to decode the block encoded signal and to format the recovered data stream for source decoding.

Abstract translation: 提供了一种无线电广播系统，用于通过自由空间发送和接收完全相干的多载波调制数字信号，其特别适于阻抗多径降级。 多载波调制信号是合成矢量调制信号，它是一个合成载波相位相干相位的正交相移键控（QPSK）调制集合，每一个占用频带内复制多次的频谱，每个矢量不超过两位 。 结合时间交织比特来采用包括大块大小，高效率块编码（诸如BCH 255,239码）的有效信道编码，以缓解频率选择性多路径和宽带多路径的影响。 广播系统设计用于支持压缩数字音频编程材料。 在根据本发明的解调过程中，解调器可操作以将相位锁定到重构或相干相干的导频音或等效时钟，以对数字信号进行相干解调，解交织以解码块编码信号并格式化恢复的数据 流解码源。

公开(公告)号：US5278826A

公开(公告)日：1994-01-11

申请号：US683945

申请日：1991-04-11

Applicant: John L. Murphy ,  Mark J. Rich

Inventor： John L. Murphy ,  Mark J. Rich

IPC: H04H20/31 ,  H04H20/95 ,  H04H40/18 ,  H04H40/54 ,  H04H60/07 ,  H04J1/05 ,  H04L27/26 ,  H04J1/14 ,  H04J1/00

CPC classification number: H04H60/07 ,  H04H20/31 ,  H04H20/95 ,  H04H40/18 ,  H04J1/05 ,  H04L27/2602 ,  H04H2201/183 ,  H04H40/54

Abstract: A radio broadcasting system is provided for transmitting and receiving through free space a composite signal consisting of a frequency modulated (fm) analog signal and a multicarrier modulated digital signal which is especially adapted to be resistive to multipath degradation. The fm signal and the digital multicarrier modulated signal are fully coherent. Further according to the invention, the digital signal comprises a plurality of carriers having a maximum amplitude at least 20 dB below the unmodulated fm signal and preferably, 30 dB below the analog signal. The multicarrier modulated signal is phase locked according to the invention to the recovered analog fm pilot tone at 19 kHz in the composite baseband spectrum of the fm signal which is at least 20 dB above the multicarrier modulated signal, which enables rapid and reliable acquisition of signal for coherent detection. In a specific embodiment, the multicarrier modulated signal is a synthesized vector-modulated signal which is a quadrature phase shift keyed (QPSK) modulated set of synthesized carriers each occupying 9.5 kHz of spectrum replicated twenty-one times within a 199.5 kHz bandwidth with no more than two bits per vector. The broadcast system is designed to be used in support of compressed digital audio programming material. In a demodulation process according to the invention, a demodulator is operative to phase lock to the recovered high-amplitude analog pilot tone, to coherently demodulate the digital signal, and to format the recovered data stream for source decoding.

Abstract translation: 提供了一种无线电广播系统，用于通过自由空间发送和接收由频率调制（fm）模拟信号和多载波调制数字信号组成的复合信号，该多路调制数字信号特别适用于阻抗多路径退化。 fm信号和数字多载波调制信号是完全一致的。 此外，根据本发明，数字信号包括多个载波，其具有比未调制的fm信号低至少20dB的最大振幅，并且优选地比模拟信号低30dB。 根据本发明，多载波调制信号在fm信号的复合基带频谱中以19kHz的恢复的模拟fm导频音被锁相，其在多载波调制信号之上至少20dB，这使得能够快速和可靠地采集信号 用于相干检测。 在具体实施例中，多载波调制信号是合成矢量调制信号，它是一个合成载波的正交相移键控（QPSK）调制集合，每个合成载波在199.5kHz带宽内占据复制二十一次的频谱的9.5kHz，没有更多 每个向量比两位。 广播系统设计用于支持压缩数字音频编程材料。 在根据本发明的解调过程中，解调器可操作以对恢复的高幅度模拟导频进行锁相，对数字信号进行相干解调，并格式化恢复的数据流以进行源解码。

公开(公告)号：US20150222382A1

公开(公告)日：2015-08-06

申请号：US14527396

申请日：2014-10-29

Applicant: NXP B.V.

Inventor： Wim van Houtum

IPC: H04J11/00 ,  H04L27/26

CPC classification number: H04J11/0066 ,  H04H20/30 ,  H04H2201/183 ,  H04L27/2647 ,  H04L27/265

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 analogue 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.

Abstract translation: 本发明提供一种接收方法和装置，其向边带信号（下，上，中）提供一系列频移和滤波操作，以便在信号的中心部分是模拟或数字的情况下能够进行检测， 通道干扰补偿。 本发明使得（H）IBOC信号例如能够以较窄的带宽进行处理，因此与传统的（H）IBOC信号处理方法相比，可以实现较低的处理时钟速度和复杂性。