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公开(公告)号：US5915028A
公开(公告)日：1999-06-22
申请号：US809739
申请日：1997-05-13
申请人： Djahanyar Chahabadi
发明人： Djahanyar Chahabadi
CPC分类号： H04H20/49 , H04S1/007 , H03D1/2209
摘要： An amplitude demodulator for demodulating a quadrature-amplitude modulated stereo signal for radio receivers, where a digital intermediate-frequency signal is constructed from a received signal, the intermediate-frequency signal is converted into a baseband, creating two orthogonal components thereby, a magnitude signal and a phase signal are derived from the orthogonal components, a tangent is constructed from the phase signal, and the tangent is multiplied by the magnitude signal to create a stereo difference signal.
摘要翻译： PCT No.PCT / DE95 / 01227 Sec。 371日期1997年5月13日 102（e）日期1997年5月13日PCT提交1995年9月8日PCT公布。 公开号WO96 / 10290 日期1996年4月4日一种用于解调用于无线电接收机的正交幅度调制立体声信号的幅度解调器，其中从接收信号构建数字中频信号，将中频信号转换为基带，产生两个正交分量 从而从正交分量导出幅度信号和相位信号，从相位信号构建切线，并将正切乘以幅度信号以产生立体声差分信号。
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2.发明授权Amplitude demodulator for radio receivers to compensate for field strength influence 失效用于无线电接收机的幅度解调器来补偿场强影响
公开(公告)号：US5461340A
公开(公告)日：1995-10-24
申请号：US288555
申请日：1994-08-10
申请人： Djahanyar Chahabadi , Lothar Vogt
发明人： Djahanyar Chahabadi , Lothar Vogt
CPC分类号： H03D1/22
摘要： In an amplitude demodulator for radio receivers, an intermediate frequency signal is converted into a digital intermediate frequency signal. The digital intermediate frequency signal is mixed into the baseband and amplitude demodulated. Either the intermediate frequency signal, or the amplitude demodulated signal, is controlled and amplified or attenuated so that the DC component of the amplitude demodulated signal is kept constant.
摘要翻译： 在无线电接收机的幅度解调器中，中频信号被转换为数字中频信号。 将数字中频信号混入基带并进行幅度解调。 中频信号或幅度解调信号被控制和放大或衰减，使得幅度解调信号的DC分量保持恒定。
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3.发明授权Radio receiver for mobile reception with sampling rate oscillator frequency being an integer-number multiple of reference oscillation frequency 失效用于移动接收的无线电接收机，采样率振荡器频率是参考振荡频率的整数倍
公开(公告)号：US5430890A
公开(公告)日：1995-07-04
申请号：US979610
申请日：1992-11-20
CPC分类号： H04B1/0007 , H03J1/005 , H04B1/0003 , H04B1/0039 , H04B1/006 , H04B1/26
摘要： Digital tuning of a locally generated frequency supplied to a frequency converting mixer, a mobile radio receiver is provided with great economy of components by utilizing the sampling rate oscillator for an analog-to-digital converter provided at the output of an analog intermediate frequency amplifier of the receiver as the source of the difference frequency for a phase locked loop (PLL) for control of the phase of a local oscillator for the mixer or mixers. All frequencies used to supply local oscillations to mixers, as well as the operating frequency of the phase locked loop are integer number multiples of the sampling rate pulse generator. Some division stages have fixed dividers and others have divisors selectable by a tuning processor and in some of the divisor connections it is useful to interpose a fixed or selectable-factor multiplier. A sampling rate of 42.75 MHz is recommended and an intermediate frequency amplifier frequency which is a rational number multiple of 57 kHZ, preferably 10.6875 MHz are similarly recommended.
摘要翻译： 提供给频率转换混频器的本地产生的频率的数字调谐，移动无线电接收机通过利用提供在模拟中频放大器的输出端的模数转换器的模拟 - 数字转换器的采样率振荡器，为组件提供了极大的经济性 接收机作为用于混频器或混频器的本地振荡器的相位控制的锁相环（PLL）的差频源。 用于向混频器提供本地振荡的所有频率以及锁相环的工作频率都是采样率脉冲发生器的整数倍数。 一些分割阶段具有固定的分频器，而其他分频器具有可由调谐处理器选择的除数，并且在一些除数连接中，插入固定或可选因子乘数是有用的。 建议采样率为42.75 MHz，并推荐使用频率为57 kHZ，最好为10.6875 MHz的有效数倍的中频放大器频率。
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4.发明授权Device for controlling the volume of a car radio as a function of driving noise 失效用于控制汽车无线电体积作为驱动噪声的功能的装置
公开(公告)号：US6031918A
公开(公告)日：2000-02-29
申请号：US793667
申请日：1997-02-27
申请人： Djahanyar Chahabadi
发明人： Djahanyar Chahabadi
CPC分类号： H04R3/12
摘要： In a device for controlling the volume of a car radio as a function of driving noise, an acceleration sensor can be mechanically connected with the body of the motor vehicle, to generate a signal dependent on driving noise.
摘要翻译： PCT No.PCT / DE95 / 01071 Sec。 371日期1997年2月27日 102（e）日期1997年2月27日PCT提交1995年8月16日PCT公布。 公开号WO96 / 07293 日期1996年3月7日在用于控制作为驱动噪声的函数的汽车无线电体积的装置中，加速度传感器可以与机动车辆的机体机械连接，以产生取决于驱动噪声的信号。
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公开(公告)号：US5661810A
公开(公告)日：1997-08-26
申请号：US522314
申请日：1995-08-25
IPC分类号： H03H17/04 , H03H17/02 , H04B1/10 , H04B1/16 , H04B1/26 , H04B1/64 , H04H1/00 , H04H20/57 , H04H40/63 , H04H40/72 , H04H5/00
摘要： The circuit arrangement includes a first low-pass filter (2) for filtering an input signal (H3) proportional to the strength of a received radio signal; a second low-pass filter (3) for filtering the input signal (H3); a first weighting circuit (7) for weighting the first low-pass filter output signal with first coefficients to form a first weighted output signal; a circuit device for forming a masking signal for reducing stereo channel isolation from the first weighted output signal; a second weighting circuit (5) for forming a second weighted output signal weighted with second coefficients from the first low-pass filter output signal or the second low-pass filter output signal according to a switching signal (DD2) indicative of interference in the audio signals; a switch device (4) for selecting the first low-pass filter output signal for weighting in the second weighting circuit means (5) when no interference is indicated by the switching signal (DD2) and the second low-pass filter output signal for weighting in the second weighting circuit means (5) when interference is indicated by the switching signal (DD2); and a circuit device for forming a masking signal for damping the audio signal from the second weighted output signal.
摘要翻译： PCT No.PCT / DE94 / 00321 Sec。 371日期1995年8月25日 102（e）日期1995年8月25日PCT 1994年3月22日PCT公布。 公开号WO94 / 22229 日期1995年9月29日该电路装置包括：第一低通滤波器（2），用于对与接收的无线电信号的强度成正比的输入信号（H3）进行滤波; 用于对输入信号（H3）进行滤波的第二低通滤波器（3）; 第一加权电路（7），用于利用第一系数对第一低通滤波器输出信号进行加权，以形成第一加权输出信号; 电路装置，用于形成用于减少立体声信道隔离的屏蔽信号与第一加权输出信号; 第二加权电路（5），用于根据指示音频中的干扰的切换信号（DD2），从第一低通滤波器输出信号或第二低通滤波器输出信号形成用第二系数加权的第二加权输出信号 信号; 开关装置（4），用于当没有由开关信号（DD2）指示干扰和用于加权的第二低通滤波器输出信号时，在第二加权电路装置（5）中选择用于加权的第一低通滤波器输出信号 在第二加权电路装置（5）中，当由切换信号（DD2）指示干扰时; 以及电路装置，用于形成用于阻尼来自第二加权输出信号的音频信号的屏蔽信号。
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公开(公告)号：US5661809A
公开(公告)日：1997-08-26
申请号：US343413
申请日：1995-02-14
IPC分类号： H03H17/04 , H03H17/02 , H04B1/10 , H04B1/16 , H04B1/26 , H04B1/30 , H04B1/64 , H04H20/88 , H04H5/00
CPC分类号： H04B1/1661 , H04B1/1027
摘要： A radio receiver is provided having digital signal processing, a first and a second auxiliary signal derived from a received stereo multiplex signal, the first auxiliary signal being dependent upon the existence of signal components, whose frequency lies above the fundamental frequency range of the stereo multiplex signal, and the second auxiliary signal being dependent upon the symmetry of the sidebands of the stereo subcarrier. The first and the second auxiliary signal are combined to form an interference signal indicating the existence of interference. At least one control signal is derived from the interference signal to influence the audio signals acquired by decoding the stereo multiplex signal.
摘要翻译： PCT No.PCT / DE94 / 00324 Sec。 371日期：1995年2月14日 102（e）日期1995年2月14日PCT 1994年3月22日PCT公布。 公开号WO94 / 22231 日期1994年9月29日提供具有数字信号处理的无线电接收机，从接收的立体声多路复用信号导出的第一和第二辅助信号，第一辅助信号取决于信号分量的存在，其频率高于基频 立体声多路复用信号的范围，第二辅助信号取决于立体声副载波的边带的对称性。 第一和第二辅助信号被组合以形成指示干扰的存在的干扰信号。 从干扰信号导出至少一个控制信号，以影响通过解码立体声多路复用信号而获得的音频信号。
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公开(公告)号：US5535280A
公开(公告)日：1996-07-09
申请号：US288554
申请日：1994-08-10
申请人： Djahanyar Chahabadi , Lothar Vogt
发明人： Djahanyar Chahabadi , Lothar Vogt
CPC分类号： H03G3/345
摘要： In a digital circuit which removes ignition noise from a multiplex signal in a radio receiver, especially in a car radio, the multiplex signal is supplied via a high-pass filter (3) and a squaring or absolute value determing circuit (4) as a digital signal with a sampling frequency that is a multiple of the frequency of the pilot tone. The high-pass filtered and squared or absolute value multiplex signal is compared to a short-time mean value of the high-pass filtered and squared (in absolute value) multiplex signal. A control signal S of predetermined duration is formed when deviations occur that are greater than a preset standard. The control signal S controls a correcting circuit in such a manner that sampling values of the multiplex signal occurring during the control signal are replaced with sampling values occurring during the previous period of the pilot tone, thereby masking the ignition noise.
摘要翻译： 在数字电路中，特别是在无线电接收机中，从多路复用信号中消除点火噪声，多路复用信号通过高通滤波器（3）和平方或绝对值确定电路（4）作为 数字信号的采样频率是导频音频率的倍数。 将高通滤波和平方或绝对值复用信号与高通滤波和平方（绝对值）复用信号的短时平均值进行比较。 当出现大于预设标准的偏差时，形成预定持续时间的控制信号S. 控制信号S以这样的方式控制校正电路，使得在控制信号期间发生的多路复用信号的采样值被替换为在导频音的前一周期期间发生的采样值，从而掩蔽点火噪声。
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8.发明授权Circuit arrangement for deriving a quality signal dependent on the quality of a received multiplex signal 失效用于根据所接收的多路复用信号的质量导出质量信号的电路装置
公开(公告)号：US5696830A
公开(公告)日：1997-12-09
申请号：US522312
申请日：1995-08-25
IPC分类号： H03H17/04 , H03H17/02 , H04B1/10 , H04B1/16 , H04B1/26 , H04B1/30 , H04B1/64 , H04H1/00 , H04H20/12 , H04H40/45 , H04H5/00
摘要： The method for obtaining the quality signal includes multiplying a digital multiplex signal (MPX) by respective reference carrier signals mutually phase shifted by 90.degree. to each other, but otherwise equal, to form a pair of mixed signals (Imr1,Imr2); multiplying the mixed signals (Imr1, Imr2) by respective correction signals (G38c,G38s) to form a pair of corrected mixed signal (Ims1,Ims2); separately multiplying the digital multiplex signal (MPX) by each of two reference pilot signals mutually shifted in phase by 90.degree. relative to each other to form respective derived signals useful for obtaining said correction signals (G38c,G38s); adding said corrected mixed signals (Ims1,Ims2) to each other; multiplying said mixed signals (Imr1,Imr2) by the respective correction signals (G38s,G38c) to form a pair of product signals; subtracting these product signals from each other to form a subtraction result and low-pass filtering the subtraction result to obtain a low-pass-filtered resultant signal from which the quality signal is derived.
摘要翻译： PCT No.PCT / DE94 / 00320 Sec。 371日期1995年8月25日 102（e）日期1995年8月25日PCT 1994年3月22日PCT公布。 出版物WO94 / 22228 日期1994年9月29日用于获得质量信号的方法包括将数字多路复用信号（MPX）乘以相互相移90°的相应参考载波信号，否则相等，以形成一对混合信号（Imr1， Imr2）; 将混合信号（Imr1，Imr2）乘以各个校正信号（G38c，G38s）以形成一对校正混合信号（Ims1，Ims2）; 将数字多路复用信号（MPX）分别乘以相互相移90°的两个参考导频信号中的每一个，以形成用于获得所述校正信号（G38c，G38s）的相应导出信号。 将所述校正后的混合信号（Ims1，Ims2）相加; 将所述混合信号（Imr1，Imr2）乘以各个校正信号（G38s，G38c）以形成一对乘积信号; 相互减去这些乘积信号以形成减法结果，并对相减结果进行低通滤波，以获得从其导出质量信号的低通滤波结果信号。
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9.发明授权Circuit arrangement for deriving a signal indicating noise in a received stereo multiplex signal 失效用于导出指示接收的立体声多路复用信号中的噪声的信号的电路装置
公开(公告)号：US5606619A
公开(公告)日：1997-02-25
申请号：US343416
申请日：1995-02-13
CPC分类号： H04B1/1661 , H04B1/1027
摘要： A circuit arrangement for deriving the signal indicating noise in a received stereo multiplex signal, wherein the stereo multiplex signal is present as a digital signal with a first sampling rate that is substantially higher than twice the upper limit of the useful frequency range of the stereo multiplex signal, and the received stereo multiplex signal is passed through a low-pass filter. The low-pass filtered signal and the received stereo multiplex signal are subjected to decimation to a second sampling rate, which is higher than twice the upper limit of the useful frequency range of the stereo multiplex signal. The two stereo multiplex signals with the second sampling rate are subtracted from one another.
摘要翻译： PCT No.PCT / DE94 / 00322 Sec。 371日期1995年2月13日 102（e）日期1995年2月13日PCT 1994年3月22日PCT公布。 公开号WO94 / 22230 日期1994年9月29日一种用于导出在接收的立体声多路复用信号中指示噪声的信号的电路装置，其中立体声多路复用信号作为数字信号存在，其具有明显高于有用频率上限的两倍的第一采样率 立体声多路复用信号的范围和接收的立体声多路复用信号通过低通滤波器。 低通滤波信号和接收的立体声多路复用信号被抽取到高于立体声多路复用信号的有用频率范围的两倍的第二采样率。 具有第二采样率的两个立体声多路复用信号彼此相减。
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公开(公告)号：US5592557A
公开(公告)日：1997-01-07
申请号：US343414
申请日：1995-02-16
CPC分类号： H04B1/1661 , H04B1/1027
摘要： In a radio receiver with digital signal processing, a stereo multiplex signal received and the useful signals derived therefrom are processed in digital form at a first sampling rate. The subsidiary signals derived from the stereo multiplex signal are at least partly processed at a second sampling rate that is smaller than the first sampling rate. The sampling rate of the processed subsidiary signals are reduced to the first sampling rate with the processed subsidiary signals, acting as control signals with the first sampling rate, affecting the stereo multiplex signal and the useful signals.
摘要翻译： PCT No.PCT / DE94 / 00326 Sec。 371日期1995年2月16日 102（e）日期1995年2月16日PCT 1994年3月22日PCT公布。 出版物WO94 / 22232 日期1994年9月29日在具有数字信号处理的无线电接收机中，接收的立体声多路复用信号和从其导出的有用信号以数字形式以第一采样率进行处理。 从立体声多路复用信号导出的辅助信号至少部分地以小于第一采样率的第二采样率进行处理。 处理的辅助信号的采样率被降低到第一采样率，其中处理的辅助信号用作具有第一采样率的控制信号，影响立体声多路复用信号和有用信号。
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