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1. 发明授权

CN101055716B 立体声解码器及处理指引信号的方法失效
公开(公告)号：CN101055716B
公开(公告)日：2011-07-20
申请号：CN200710001522.3
申请日：2007-01-04
申请人：联发科技股份有限公司
发明人：陈界弘 , 张湘辉 , 黄志坚
IPC分类号： G10L19/00
CPC分类号： H04H40/54
摘要：本发明提供一种立体声解码器以及处理指引信号的方法。该立体声解码器由一调频解调器接收一多任务信号，所述立体声解码器包含一第一校正电路、一主动式带通滤波器、一第二校正电路、一截切器以及一锁相回路；所述第一校正电路产生一第一控制信号；所述主动式带通滤波器具有一由所述第一控制信号设定的中心频率，并根据该中心频率对所述多任务信号滤波以产生所述指引信号；所述第二校正电路产生一第二控制信号；所述截切器将所述指引信号转换成一方波信号；所述锁相回路电路包含一压控振荡器，因应所述第二控制信号产生一振荡频率；所述锁相回路电路用以接收所述方波信号，并因应所述振荡频率产生所述预设频率的参考信号。

2. 发明公开

CN101055716A 立体声解码器及处理指引信号的方法失效
公开(公告)号：CN101055716A
公开(公告)日：2007-10-17
申请号：CN200710001522.3
申请日：2007-01-04
申请人：联发科技股份有限公司
发明人：陈界弘 , 张湘辉 , 黄志坚
IPC分类号： G10L19/00 , H03M13/00 , H04H5/00 , H04S5/00
CPC分类号： H04H40/54
摘要：本发明提供一种立体声解码器以及处理指引信号的方法。该立体声解码器由一调频解调器接收一多任务信号，所述立体声解码器包含一第一校正电路、一带通滤波器、一第二校正电路、一截切器以及一锁相回路；所述第一校正电路产生一第一控制信号；所述带通滤波器具有一由所述第一控制信号设定的中心频率，并根据该中心频率对所述多任务信号滤波以产生所述指引信号；所述第二校正电路产生一第二控制信号；所述截切器将所述指引信号转换成一方波信号；所述锁相回路电路包含一压控振荡器，因应所述第二控制信号产生一振荡频率；所述锁相回路电路用以接收所述方波信号，并因应所述振荡频率产生所述预设频率的参考信号。

3. 发明公开

EP1852988A1 SUBCARRIER SIGNAL GENERATOR AND MULTIPLEXED SIGNAL DEMODULATOR 审中-公开
标题翻译：多功能信号解调器的分支信号发生器
公开(公告)号：EP1852988A1
公开(公告)日：2007-11-07
申请号：EP06711588.1
申请日：2006-01-12
申请人： Pioneer Corporation
发明人： KUBUKI, Toshiaki , YAMAMOTO, Yuji
IPC分类号： H04H5/00
CPC分类号： H04H40/54 , H04B1/1653 , H04H40/63
摘要： A subcarrier signal generator according to the present invention includes a BPF that extracts a pilot signal from an FM detection signal, a π/2 phase shifter that generates a pilot shift signal, in which a phase of the pilot signal is shifted by π/2, a first multiplier that multiplies the pilot signal with the pilot shift signal to generate a first resultant signal, a second multiplier that squares the pilot signal, a third multiplier that squares the pilot shift signal, an adder that adds the squared pilot signal and the squared pilot shift signal to generate a second resultant signal, and a divider that divides the first resultant signal with the second resultant signal to generate a subcarrier signal. When a subcarrier signal is generated from a multiplexed pilot signal in this manner, an amplitude level of the subcarrier signal can be made constant all the time.
摘要翻译：根据本发明的副载波信号发生器包括从FM检测信号中提取导频信号的BPF，产生导频信号的π/ 2移相器，其中导频信号的相位偏移±2 将所述导频信号与所述导频移位信号相乘以产生第一合成信号的第一乘法器，对所述导频信号求平方的第二乘法器，对所述导频移位信号进行平方的第三乘法器，将所述平方引导信号和所述导频信号相加的加法器，平方引导移位信号以产生第二结果信号，以及除法器，其将第一结果信号与第二结果信号分开以产生副载波信号。当以这种方式从复用的导频信号产生副载波信号时，副载波信号的振幅电平可以始终保持恒定。

4. 发明授权

EP1239616B1 Verfahren und Schaltungsanordnung zur Demodulation des RDS-Signals 有权
标题翻译：解调RDS信号的方法和电路装置
公开(公告)号：EP1239616B1
公开(公告)日：2004-09-29
申请号：EP02003953.3
申请日：2002-02-22
申请人： Harman/Becker Automotive Systems (Becker Division) GmbH
发明人： Gierl, Stefan, Dr.-Ing. , Benz, Christoph, Dipl.-Ing.
IPC分类号： H04H1/00 , H03D1/22
CPC分类号： H04H40/18 , H04H20/34 , H04H40/54 , H04H2201/13

5. 发明申请

WO2006077761A1 サブキャリア信号生成装置および多重化信号復調装置审中-公开
标题翻译： SUBCARRIER信号发生器和多路复用信号解调器
公开(公告)号：WO2006077761A1
公开(公告)日：2006-07-27
申请号：PCT/JP2006/300265
申请日：2006-01-12
申请人：パイオニア株式会社 , 久冨木俊明 , 山本雄治
发明人：久冨木俊明 , 山本雄治
IPC分类号： H04H5/00
CPC分类号： H04H40/54 , H04B1/1653 , H04H40/63
摘要：　本発明のサブキャリア信号生成装置は、ＦＭ検波信号からパイロット信号を抽出するＢＰＦと、パイロット信号の位相をπ／２シフトさせたパイロットシフト信号を生成するπ／２移相器と、パイロット信号とパイロットシフト信号とを乗算して、乗算信号を生成する第１の乗算器と、パイロット信号を２乗する第２の乗算器と、パイロットシフト信号を２乗する第３の乗算器と、２乗されたパイロット信号と２乗されたパイロットシフト信号とを加算して、加算信号を生成する加算器と、乗算信号を加算信号で除算して、サブキャリア信号を生成する除算器とを備え、多重化信号のパイロット信号からサブキャリア信号を生成する場合に、常に、サブキャリア信号の振幅レベルを一定にする。
摘要翻译：子载波信号发生器包括用于从FM检测信号提取导频信号的BPF，用于产生其相位与导频信号相移p / 2的导频移位信号的ap / 2移相器，第一乘法器通过将导频信号乘以导频移位信号来产生乘法信号，第二乘法器，用于使导频信号平方;第三乘法器，用于使导频移位信号平方;加法器，用于通过将平方导频信号相加到平方导频移位信号，以及用于通过将相乘信号除以相加信号来产生副载波信号的分频器。当从多路复用信号的导频信号产生副载波信号时，子载波信号的振幅电平总是恒定。

6. 发明申请

US20080214133A1 System and method of a stereo receiving system 有权
标题翻译：立体声接收系统的系统和方法
公开(公告)号：US20080214133A1
公开(公告)日：2008-09-04
申请号：US11712719
申请日：2007-03-01
申请人： Raed S. Shatara , Jeffrey J. Marrah
发明人： Raed S. Shatara , Jeffrey J. Marrah
IPC分类号： H04B7/04
CPC分类号： H04H40/54 , H04H20/57
摘要： A system and method of a stereo receiving system, including a plurality of antennas, a receiving device, a plurality of summing devices, a phase lock loop device, a controllable phase shifter device, and a gain-control device. The plurality of antennas receive RF signals having a common frequency but potentially different phases. The receiving device is in electrical communication with the plurality of antennas. The plurality of summing devices are in electrical communication between at least one of the plurality of antennas and the receiving device. The phase lock loop device is in electrical communication with the receiving device. The gain-control device is in electrical communication between the plurality of antennas and the receiving device, wherein the gain-control device controls a signal-to-noise ratio of the RF signals aligned from the plurality of antennas.
摘要翻译：包括多个天线的立体声接收系统的系统和方法，接收装置，多个求和装置，锁相环装置，可控移相器装置和增益控制装置。多个天线接收具有共同频率但潜在不同相位的RF信号。接收设备与多个天线电通信。多个求和装置在多个天线中的至少一个天线和接收装置之间进行电气通信。锁相环装置与接收装置电连通。所述增益控制装置在所述多个天线与所述接收装置之间进行电气通信，其中所述增益控制装置控制从所述多个天线对准的所述RF信号的信噪比。

7. 发明申请

US20020131603A1 Circuit arrangement for gaining a stereo subcarrier and an RDS carrier 失效
标题翻译：用于获得立体声副载波和RDS载波的电路布置
公开(公告)号：US20020131603A1
公开(公告)日：2002-09-19
申请号：US10083334
申请日：2001-10-22
发明人： Guenter Hildebrandt , Gerrit Jan Groot Hulze
IPC分类号： H04H005/00
CPC分类号： H04H40/54 , H04B1/1653 , H04H2201/13
摘要： According to the invention, a circuit arrangement for gaining a 38 kHz stereo subcarrier and a 57 kHz RDS carrier for decoding a stereo signal comprised in a demodulated FM signal and/or an RDS signal comprised in a demodulated FM signal, having a simple structure with only one PLL and particularly only one voltage-controlled oscillator (2) is characterized in that the arrangement comprises a phase-locked loop with a loop filter (1), a voltage-controlled oscillator (2), a first phase detector (3) which receives a reference signal having a reference frequency, and a second phase detector (4), which receives the FM signal, the output signal of the voltage-controlled oscillator (2) being coupled to both phase detectors (3, 4) in a form divided down by means of dividers (6, 9; 10, 11), and the signal fed back to the second phase detector having a frequency of 19 kHz, in that dividers (9, 10, 12) are provided, by means of which the output signal of the voltage-controlled oscillator (2) is divided down and which supply the 38 kHz stereo subcarrier and the 57 kHz RDS carrier, in that a frequency control circuit (8), which is active only upon start-up of the circuit arrangement, compares the two signals applied to the first phase detector (3) and controls the voltage-controlled oscillator (2) in a predetermined frequency range around the reference frequency of the reference signal, in that, after reaching the predetermined frequency range, the frequency control circuit (8) is deactivated and the output signal of the first phase detector (3) is coupled to the loop filter (1), and in that subsequently, if the demodulated FM signal should comprise a 19 kHz pilot, the output signal of the second phase detector (4) is coupled to the loop filter (1).
摘要翻译：根据本发明，一种用于获得38kHz立体声副载波的电路装置和用于解码包含在解调FM信号中的立体声信号和/或包含在解调FM信号中的RDS信号的57kHz RDS载波，具有简单的结构，具有只有一个PLL，特别是一个压控振荡器（2）的特征在于该装置包括具有环路滤波器（1）的锁相环，压控振荡器（2），第一相位检测器（3）和接收FM信号的第二相位检测器（4），压控振荡器（2）的输出信号被耦合到两个相位检测器（3,4）通过分频器（6,9,10,11）分割的形式，并且通过分频器（9,10,12）将信号反馈到具有19kHz频率的第二相位检测器，借助于分频器压控振荡器（2）的输出信号为d 分频并提供38kHz立体声副载波和57kHz RDS载波，因为频率控制电路（8）仅在电路装置启动时有效，将施加到第一相位检测器的两个信号进行比较（3），并且在基准信号的参考频率附近的预定频率范围内控制压控振荡器（2），因为在达到预定频率范围之后，频率控制电路（8）被去激活，并且输出信号第一相位检测器（3）的输出信号耦合到环路滤波器（1），并且随后，如果解调的FM信号应该包括19kHz导频，则第二相位检测器（4）的输出信号耦合到环路滤波器（1）。

8. 发明授权

US5278844A Method and apparatus for digital audio broadcasting and reception 失效
标题翻译：用于数字音频广播和接收的方法和装置
公开(公告)号：US5278844A
公开(公告)日：1994-01-11
申请号：US683918
申请日：1991-04-11
申请人： John L. Murphy , Mark J. Rich
发明人： John L. Murphy , Mark J. Rich
IPC分类号： H04H20/31 , H04H20/95 , H04H40/18 , H04H40/54 , H04H60/07 , H04L1/00 , H04L27/26 , G06F11/08 , H04L1/04
CPC分类号： H04H60/07 , H04H20/31 , H04H20/95 , H04H40/18 , H04L1/0057 , H04L1/0071 , H04L27/2601 , H04H2201/183 , H04H40/54 , H04L2001/0093
摘要： 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.
摘要翻译：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。

9. 发明授权

US5278826A Method and apparatus for digital audio broadcasting and reception 失效
标题翻译：用于数字音频广播和接收的方法和装置
公开(公告)号：US5278826A
公开(公告)日：1994-01-11
申请号：US683945
申请日：1991-04-11
申请人： John L. Murphy , Mark J. Rich
发明人： John L. Murphy , Mark J. Rich
IPC分类号： H04H20/31 , H04H20/95 , H04H40/18 , H04H40/54 , H04H60/07 , H04J1/05 , H04L27/26 , H04J1/14 , H04J1/00
CPC分类号： H04H60/07 , H04H20/31 , H04H20/95 , H04H40/18 , H04J1/05 , H04L27/2602 , H04H2201/183 , H04H40/54
摘要： 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.
摘要翻译：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。

10. 发明授权

US06661292B2 Apparatus and method for demodulating a radio data system (RDS) signal 有权
标题翻译：用于解调无线电数据系统（RDS）信号的装置和方法
公开(公告)号：US06661292B2
公开(公告)日：2003-12-09
申请号：US10096342
申请日：2002-03-11
申请人： Stefan Gierl , Christoph Benz
发明人： Stefan Gierl , Christoph Benz
IPC分类号： H03L700
CPC分类号： H04H40/18 , H04H20/34 , H04H40/54 , H04H2201/13
摘要： To demodulate the RDS signal, the stereo-multiplex signal is multiplied in a first branch by the in-phase component of an oscillator filtered by a low-pass filter while decimated in its sampling rate and filtered by a high-pass filter while in a second branch it is multiplied by the quadrature component of the oscillator filtered by a low-pass filter decimated in its sampling rate, and filtered by a high-pass filter. An error signal to control the oscillator is calculated from the high-pass-filtered signals and the RDS bit clock. A clock generator generating the RDS bit clock is controlled by the first high-pass-filtered signal and by the oscillator. An RDS decoder, to whose input the first high-pass-filtered signal is applied. and an arithmetic unit which calculates the error signal from the high-pass-filtered signals and from the PDS bit clock are both clocked by the clock generator. The RDS data are retrievable from the output of the RDS decoder.
摘要翻译：为了解调RDS信号，立体声多路复用信号在由低通滤波器滤波的振荡器的同相分量中被第一分支相乘，同时以其采样率抽取并被高通滤波器滤波，同时在第二分支乘以由其采样率抽取的低通滤波器滤波的振荡器的正交分量，并由高通滤波器滤波。根据高通滤波信号和RDS位时钟计算控制振荡器的误差信号。产生RDS位时钟的时钟发生器由第一高通滤波信号和振荡器控制。 RDS解码器，其输入端应用第一个高通滤波信号。并且计算来自高通滤波信号和PDS位时钟的误差信号的算术单元均由时钟发生器计时。可以从RDS解码器的输出中检索RDS数据。

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