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1. 发明申请

WO00021228A1 METHOD FOR EQUALIZATION OF COMPLEMENTARY CARRIERS IN AN AM COMPATIBLE DIGITAL AUDIO BROADCAST SYSTEM 审中-公开
标题翻译：在兼容数字音频广播系统中的补充载体的均衡方法
公开(公告)号：WO00021228A1
公开(公告)日：2000-04-13
申请号：PCT/US1999/020277
申请日：1999-09-02
IPC分类号： H04L27/26 , H04B1/16 , H04B3/06 , H04B7/005 , H04H20/49 , H04J11/00 , H04L25/03 , H04H1/00
CPC分类号： H04H20/30 , H04L25/03159 , H04L2025/03414 , H04L2025/03522
摘要： A method is provided for equalizing an amplitude modulated compatible digital broadcasting signal which includes an amplitude modulated radio frequency signal having a first frequency spectrum, the amplitude modulated radio frequency signal having a first carrier modulated by an analog program signal, a plurality of digitally modulated carrier signals positioned within a bandwidth which encompasses the first frequency spectrum, a first group of the digitally modulated carrier signals including complementary signals and lying within the first frequency spectrum, and second and third groups of the digitally modulated carrier signals including non-complementary signals and lying outside of the first frequency spectrum. The method includes the steps of producing a first signal representative of in-phase components of the amplitude modulated compatible digital broadcasting signal; producing a second signal representative of quadrature-phase components of the amplitude modulated compatible digital broadcasting signal; using the first and second signals as the real and imaginary inputs to take the Fast Fourier Transform of the first and second signals to produce a plurality of transformed signals representative of frequency domain data; processing the tranformed signals by multiplying the transformed signals by an equalization vector, with the equalization vector comprising a plurality of equalizer coefficients; and updating the equalizer coefficients used for the complementary signals by interpolating coefficients of the vector for the non-complementary signals. The invention also encompasses the operation of radio frequency receivers which utilize the above method, as well as apparatus that performs the above method and radio frequency receivers which utilize the above equalization method.
摘要翻译：提供了一种用于均衡调幅的兼容数字广播信号的方法，该幅度调制的兼容数字广播信号包括具有第一频谱的幅度调制的射频信号，调幅射频信号具有由模拟节目信号调制的第一载波，多个数字调制载波定位在包含第一频谱的带宽内的信号，包括互补信号并位于第一频谱内的第一组数字调制载波信号，以及第二和第三组数字调制载波信号，包括非互补信号和放置在第一频谱之外。该方法包括以下步骤：产生表示调幅兼容的数字广播信号的同相分量的第一信号; 产生表示调幅兼容的数字广播信号的正交相位分量的第二信号; 使用第一和第二信号作为实信号和虚信号进行第一和第二信号的快速傅里叶变换，以产生代表频域数据的多个变换信号; 通过将经变换的信号乘以均衡矢量来处理变换的信号，均衡矢量包括多个均衡器系数; 以及通过内插非互补信号的矢量的系数来更新用于互补信号的均衡器系数。本发明还包括利用上述方法的射频接收机的操作以及执行上述方法的装置和利用上述均衡方法的射频接收机。

2. 发明申请

WO03019830A9 COCHLEAR IMPLANTS AND APPARATUS/METHODS FOR IMPROVING AUDIO SIGNALS BY USE OF FREQUENCY-AMPLITUDE-MODULATION-ENCODING (FAME) STRATEGIES 审中-公开
标题翻译：使用频率幅度调制编码（FAME）策略改善音频信号的耳蜗植入物和装置/方法
公开(公告)号：WO03019830A9
公开(公告)日：2003-07-31
申请号：PCT/US0227205
申请日：2002-08-27
申请人： UNIV CALIFORNIA
发明人： ZENG FAN-GANG , NIE KAI-BAO
IPC分类号： A61N1/36 , A61N1/372 , H04H20/48 , H04H20/49 , H04R25/00 , H04H5/00
CPC分类号： H04H20/49 , A61N1/36036 , H04H20/48 , H04R25/356 , H04R25/505
摘要： A method of improving sound quality of audio signals that are digitally processed includes steps of extracting amplitude and frequency modulations from one or more narrow bands of the audio signal, and filtering and compressing those modulations to produce amplitude and frequency modulated audio signals that are digitally processed to provide an acoustic signal similar to the original audio signal. The methods may be used in auditory prostheses and telecommunication systems.
摘要翻译：一种改善数字处理的音频信号的音质的方法包括以下步骤：从音频信号的一个或多个窄带提取振幅和频率调制，以及对这些调制进行滤波和压缩以产生经数字处理的振幅和频率调制的音频信号以提供与原始音频信号类似的声学信号。这些方法可以用于听觉假体和电信系统。

3. 发明申请

WO99067905A1 SIMPLIFIED AM STEREO DETECTOR 审中-公开
标题翻译：简化的立体声检测器
公开(公告)号：WO99067905A1
公开(公告)日：1999-12-29
申请号：PCT/GB1999/001975
申请日：1999-06-23
IPC分类号： H04H1/00 , H04H20/49 , H04H5/00
CPC分类号： H04H20/49
摘要： Left and right stereo audio information is reproduced from a compatible quadrature amplitude modulation (C-QUAM) broadcast using a simplified approximation to true C-QUAM decoding. A synchronous detection approximation is used which avoids generating an envelope signal or calculating a cosine correction factor as in true C-QUAM decoding. The method requires less intensive computation power thereby allowing a digital signal processor to perform other functions at the same time. The method produces no perceivable distortion or artifacts when reproducing normal broadcast material.
摘要翻译：使用简化的逼真到真正的C-QUAM解码，从兼容的正交幅度调制（C-QUAM）广播再现左和右立体声音频信息。使用同步检测近似，其避免产生包络信号或计算余弦校正因子，如真正的C-QUAM解码。该方法需要较少的计算能力，从而允许数字信号处理器同时执行其它功能。当再现普通广播资料时，该方法不产生可察觉的失真或伪像。

4. 发明申请

WO2020043905A1 PROCEDE DE DATATION DE SIGNAUX DE TELEMESURE 审中-公开
公开(公告)号：WO2020043905A1
公开(公告)日：2020-03-05
申请号：PCT/EP2019/073264
申请日：2019-08-30
申请人： ZODIAC DATA SYSTEMS
发明人： SINI, Youcef , THOMAS, Alain , PASTERNAK, Nicolas
IPC分类号： H04L27/00 , H03D3/24 , H04H20/49 , H04L27/06
摘要： L'invention concerne un procédé de datation de réception de données numériques d'un signal modulé, ledit signal résultant de la modulation d'une porteuse ou sous-porteuse par un signal numérique, le débit de symboles du signal numérique étant un sous-multiple entier N de la fréquence de la porteuse ou sous-porteuse, ledit procédé comprenant les étapes consistant à: - démodulation cohérente au moyen d'une boucle de phase d'une pluralité d'échantillons sm(k) du signal modulé et obtention d'une pluralité d'échantillons démodulés sdm(k) et de la phase de la porteuse reconstituée; - association de la pluralité échantillons démodulés sdm(k) avec la phase simultanée φ(k) de la porteuse reconstituée - détermination d'une pluralité de dates de passage à une valeur déterminée φ0 de la phase de la porteuse reconstituée, relativement à la date de réception d'au moins un échantillon sm(k), selon un décalage de temps pendant lequel la porteuse tourne de φ(k) à φ0.

5. 发明申请

WO02071663A3 METHOD FOR REDUCING THE OUT-OF-BAND EMISSION IN AM TRANSMITTERS FOR DIGITAL TRANSMISSION 审中-公开
标题翻译：法降低带外辐射的IN AM电台数字传输
公开(公告)号：WO02071663A3
公开(公告)日：2003-10-02
申请号：PCT/EP0200431
申请日：2002-01-17
申请人： DEUTSCHE TELEKOM AG , RUDOLPH DIETMAR , SCHAEFER ANDREAS
发明人： RUDOLPH DIETMAR , SCHAEFER ANDREAS
IPC分类号： H04H20/49 , H04J11/00 , H04L27/34 , H04H1/00
CPC分类号： H04L27/3405 , H04H20/46
摘要： The problem associated with digital transmission using existing AM transmitters is that the out-of-band emission that occurs must be reduced in order to comply with the ITU mask, as the shoulder distances that can be achieved by the AM transmitters are not sufficient for a satisfactory compensation. The signals that are required to control the AM transmitters, (amplitude signal and phase-modulated RF signal), are formed from the digital modulation signal by a Cartesian } polar transformation, whereby the bandwidth for the amplitude signal and RF signal reaches a value, which causes an unacceptable out-of-band emission. To prevent this, the invention provides methods for digital modulation, which avoid the zero point by a wide margin in their vector diagram representations, i.e. which form a "hole" around the 0/0 point. Modulation methods of this type are referred to as offset modulations and coded modulations. A variant of 16APSK is particularly suitable, as a higher net data throughput can be achieved with only 16 set points and negligible error protection coding is required. To transmit an OFDM signal, the "hole" in the vector diagram is obtained by offsetting the zero crossings for the I(t) and Q(t) signals and the latter is achieved by the insertion of a pulse into the subsequent component, e.g. I(t), if the other component Q(t) already falls short of a defined threshold value. A BPSK test sequence for measuring the radio channel can be used by means a modification, in which a modulation signal is formed by inserting a pulse between two pulses with a change of sign bit, said modulation signal having a "hole" around the 0/0 point. The size of the hole can be adjusted by the inserted pulse.
摘要翻译：与现有的AM发射机的数字传输导致了必须被最小化以符合ITU-掩模因为通过AM站间距肩可实现的是不足以足够的补偿发生在带外辐射的问题。所需的用于控制AM发射机信号 - 振幅信号和相位调制的RF信号 - 通过变换笛卡尔从数字调制信号形成}极性，其中，所述振幅信号和RF信号的带宽达到值，这导致不可接受的带外辐射。为了避免这种情况，在矢量图所示，当程序已经提出了用于数字调制零顺广泛，这是一个“洞”周围的0/0点的形式。称为调制方法偏移调制和编码调制。特别合适的是16APSK的一个变种，因为高的净数据吞吐量只有16集点实现，需要一点差错编码。用于OFDM信号的传输中，“孔”在矢量图通过以下事实实现了零个杜赫通道为I（T） - 和Q相加（t）的信号，并且这被实现，即，随后的部件，例如。 B. I（t）的，当另一分量Q（t）的下降到低于定义的阈值的脉冲被加到。使用用于测量无线电信道到BPSK测试序列可以通过修改来实现，如我们通过插入具有符号改变，其中由0/0点，一个“洞”，它的插入通过的尺寸已在矢量图两个脉冲之间的脉冲形成的调制信号脉冲可以被设置。

6. 发明申请

WO02098028A3 METHOD AND ARRANGEMENT FOR DIGITAL TRANSMISSION USING AM EMITTERS 审中-公开
标题翻译：方法和系统数字传输AM电台
公开(公告)号：WO02098028A3
公开(公告)日：2003-07-24
申请号：PCT/DE0201314
申请日：2002-04-10
申请人： DEUTSCHE TELEKOM AG , RUDOLPH DIETMAR
发明人： RUDOLPH DIETMAR
IPC分类号： H04B1/04 , H04H20/49 , H04H1/00 , H03F1/02
CPC分类号： H04H20/49
摘要： During digital transmission using existing non-linear AM emitters, spurious emissions occur as a result of the non-linear distortions, in turn causing inner band disturbances and also disturbing adjacent channels, as out-of-band radiation. Non-linear distortions are especially critical for digital multiple carrier signals (e.g. OFDM) which are recommended by the ITU with the DRM system for the AM area. In order to avoid the non-linear distortions, the end step of the AM emitter is operated in the linear mode, thus ensuring the ITU spectrum mask. The relatively low efficiency of the emitter during the linear operation can be improved by tracking the distribution voltage of the emitter end step according to the drive. To this end, the envelope of the complex modulated data signal is scanned, and said signal controls the distribution voltage for the emitter end step by means of the modulator operating as a switched-mode power supply unit.
摘要翻译：在与现有的非线性AM发射机的数字传输由于非线性失真发生杂散发射，这导致带内干扰和干扰作为带外发射相邻Känale的。特别关键的是数字多载波信号的非线性失真（例如，OFDM），建议国际电联与用于AM范围DRM系统中的应用。为了避免非线性失真，提出了以操作AM发射机的最后阶段以线性方式。因此，符合ITU频谱屏蔽可以保证。在线性操作发射机的相对低的效率可以改善，即在依赖发射机输出级的电源电压被控制跟踪。所述复调制数据信号的包络是为其采样，并且在操作作为开关模式电源调制器中，对于发射机输出级电源电压此信号控制。

7. 发明申请

WO02091640A3 METHOD FOR INCREASING THE POWER EMITTED DURING THE TRANSMISSION OF DIGITAL MULTI-CARRIER SIGNALS WITH AM EMITTERS 审中-公开
标题翻译：法用于提高辐射功率以数字信号的传输与多个车辆AM电台
公开(公告)号：WO02091640A3
公开(公告)日：2003-02-13
申请号：PCT/DE0201299
申请日：2002-04-09
申请人： DEUTSCHE TELEKOM AG , RUDOLPH DIETMAR
发明人： RUDOLPH DIETMAR
IPC分类号： H04H20/49 , H04L27/26 , H04H1/00
CPC分类号： H04H20/49 , H04L27/2614 , Y02D70/00 , Y02D70/168
摘要： For digital transmission with existing AM emitters, the ITU recommends a system which functions according to a multi-carrier method (OFDM). Based on the distribution density of the amplitude values, digital multi-carrier signals have a relatively large ratio of maximum power to effective power (crest factor), in such a way that the AM emitter can only emit comparatively small digital power. Furthermore, in the event of saturation, the non-linear mode of the AM emitter causes inner band and outer band disturbances. By limiting the amplitude of the amplitude signal, the crest factor can be reduced and the inner band and outer band disturbances can be minimised. The amplitude is advantageously limited before converting the complex I/Q signal into an amplitude signal and a phase-modulated RF signal, so as not to disturb the narrow coupling between the amplitude signal and the RF signal. In this way, non-linear distortions can be minimised. By carrying out an additional filtering after limiting the amplitude, the truncated VQ signal is rounded, and especially inner band disturbances can be reduced.
摘要翻译：为了与现有的AM发射机的数字传输，具有多载波（OFDM）的系统是由ITU推荐的。数字多载波信号具有由于振幅值的密度分布，相对大的比最大功率有效功率（峰值因子）的，从而使AM发射机能够辐射只有相对较小的数字表现的。此外，AM发射机的非线性模式中的过驱动Innerband-和带外干扰引起的。由振幅信号的振幅限制，既减小峰值因数的和最小化的Innerband-并且可以实现的带外干扰。的振幅限制的复杂的I / Q信号的幅度信号和相位调制的RF信号的转换之前被有利地进行，从而不与所述振幅信号和RF信号之间的紧密耦合干涉。以这种方式，非线性失真可以被最小化。通过根据振幅限制切割VQ信号附加滤波是圆形的，从而在带内干扰可以特别地减小。

8. 发明申请

WO98052318A1 SYSTEM AND METHOD OF DATA TRANSMISSION IN THE AM FREQUENCY SPECTRUM 审中-公开
标题翻译：数据传输在AM频谱中的系统和方法
公开(公告)号：WO98052318A1
公开(公告)日：1998-11-19
申请号：PCT/US1998/010061
申请日：1998-05-13
IPC分类号： H04H20/36 , H04H20/49 , H04L9/00
CPC分类号： H04H20/36 , H04H20/49
摘要： A system and method for transmitting digital information concurrent with a co-existing monophonic amplitude modulated (AM) signal are disclosed. The system allows any AM transmission, in particular commercial AM Radio Broadcasts, to incorporate an orthogonally modulated data signal without significant interference to the on-going AM Broadcast. This data is then demodulated at the system's receiver (700). The system's receiver (700) permits user options as to delaying output of the data and choice of audio (630) or visual (624) outputs. The system also allows encryption of the data prior to transmission to thereby permit only authorized users to access it at the receiver end.
摘要翻译：公开了一种用于与共存单声道幅度调制（AM）信号同时发送数字信息的系统和方法。该系统允许任何AM传输，特别是商业AM无线电广播，以合并正交调制的数据信号，而不会对正在进行的AM广播产生显着的干扰。然后在系统的接收机（700）解调该数据。系统的接收器（700）允许用户选择延迟数据的输出和音频（630）或视觉（624）输出的选择。该系统还允许在传输之前对数据进行加密，从而仅允许经授权的用户在接收机端访问数据。

9. 发明申请

WO98040966A1 SYSTEM AND METHOD FOR HIGH SPEED DIGITAL DATA CASTING CONCURRENT WITH AMPLITUDE MODULATED BROADCASTS 审中-公开
标题翻译：用于高速数字数据投影的系统和方法与扩频调制广播
公开(公告)号：WO98040966A1
公开(公告)日：1998-09-17
申请号：PCT/US1998/004948
申请日：1998-03-13
IPC分类号： H03C1/52 , H03C3/40 , H03D7/16 , H04H20/36 , H04H20/49 , H04L27/26 , H03C1/00 , H04H1/00 , H04L27/02
CPC分类号： H04H20/36 , H03C1/52 , H03C3/40 , H03C2200/0058 , H03D7/163 , H04H20/49 , H04L27/2601
摘要： A system and method for transmitting digital information concurrent with a co-existing monophonic amplitude modulated (AM) signal are disclosed. The system allows any AM transmission, in particular commercial AM Radio Broadcasts, to incorporate an orthogonally modulated data signal without significant interference to the ongoing AM broadcast. A high bandwith efficiency modulated data signal is subcarrier modulated (14) onto one or more subcarrier signals. The composite data carrier (22) is then quadrature phase modulated (32, 36) onto the broadcast carrier signal (42, 44, 46) before amplitude modulation. The rate of data transmission, measured in bits-per-second, can be matched to the intended transmission channel (16) and AM modulation characteristics in order to optimize delivery performance and quality of service. In the preferred embodiment, data is phase modulated onto a set of orthogonal base band carrier tones which are then used to angle modulate (54) the RF Carrier. Transmission and receiver methods are disclosed which utilize existing state-of-the-art Compatible Quadrature Amplitude Modulation (C-QUAM) AM Stereo phase modulation Exciter with small modification.
摘要翻译：公开了一种与共存的单声道调幅（AM）信号同时发送数字信息的系统和方法。该系统允许任何AM传输，特别是商业AM无线电广播，以合并正交调制的数据信号，而不会对正在进行的AM广播产生显着的干扰。高频带效率调制数据信号被副载波调制（14）到一个或多个子载波信号上。然后，在振幅调制之前，将复合数据载体（22）正交相位调制（32,36）到广播载波信号（42,44,46）上。以每秒秒为单位测量的数据传输速率可以与预期的传输信道（16）和AM调制特性相匹配，以便优化传送性能和服务质量。在优选实施例中，数据被相位调制到一组正交基带载波音调上，然后将其用于角度调制（54）RF载波。公开了利用现有最先进的兼容正交幅度调制（C-QUAM）AM立体声相位调制激励器进行小修改的传输和接收机方法。

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