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41. 发明申请

US20110133831A1 Demodulator for Simultaneous Multi-Node Receiving and the Method Thereof 有权
标题翻译：同时多节点接收解调器及其方法
公开(公告)号：US20110133831A1
公开(公告)日：2011-06-09
申请号：US12994670
申请日：2009-04-08
申请人： Sun-hee Kim , Yun-jae Won , Seung-ok Lim
发明人： Sun-hee Kim , Yun-jae Won , Seung-ok Lim
IPC分类号： H03D1/02
CPC分类号： H03D7/165 , H03D1/2245 , H04L5/12 , H04L27/06
摘要： The present invention relates to a demodulator for simultaneous multi-node receiving and a method therof; and, more particularly, a demodulator in a wireless communication system for receiving signals from multi nodes simultaneously and a method thereof.In accordance with the aspect of the present invention, there is provided a demodulator for simultaneous multi-node receiving which comprises: a clock generator for generating a pair of CW signals and a pair of demodulating modules, wherein the demodulating modules comprise a mixer for multiplying received signals and one of the CW signals, an integrator for integrating multiplied signal and data operating unit for calculating variation result of integrated signal at every certain symbol duration and deciding output data in accordance with the variation result.
摘要翻译：本发明涉及用于同时多节点接收的解调器和一种方法，更具体地，涉及用于从多个节点同时接收信号的无线通信系统中的解调器及其方法。根据本发明的方面，提供了一种用于同时多节点接收的解调器，包括：时钟发生器，用于产生一对CW信号和一对解调模块，其中解调模块包括用于乘法的混频器接收信号和CW信号中的一个，用于积分乘法信号的积分器和数据操作单元，用于计算每一个特定符号持续时间的积分信号的变化结果，并根据变化结果确定输出数据。

42. 发明申请

US20100328041A1 AM (AMPLITUDE MODULATION) DEMODULATION SYSTEM FOR RFID READER DEVICE 有权
标题翻译： AM（AMPLITUDE MODULATION）用于RFID读取器装置的解调系统
公开(公告)号：US20100328041A1
公开(公告)日：2010-12-30
申请号：US12848661
申请日：2010-08-02
申请人： Aydin Arrigo
发明人： Aydin Arrigo
IPC分类号： H04Q5/22 , H03D1/02
CPC分类号： H03J1/10
摘要： An RFID reader device (31), of the type comprising a demodulator (6) for receiving from a RFID tag (11) an AM (Amplitude Modulation) wave (20) having a predetermined frequency (f) and for retrieving, from the AM wave (20), a demodulated output (6a) associated to predetermined positive or negative Amplitudes of said AM wave (20), said demodulated output having a portion with a frequency F. The AM demodulation system comprises at least a second demodulator (26) for receiving the AM wave (20) and retrieving a second demodulated output (26a) associated to Amplitudes opposite to the predetermined positive or negative Amplitudes, said second demodulated output having a portion with said frequency F; the RFID reader includes a block (27) having, in input, the demodulated output (6a) and the second demodulated output (26a) and returning, in output, an enforced demodulated output (30) with a portion with frequency (f1) doubled with respect to said frequency (F).
摘要翻译：一种RFID读取器装置（31），包括用于从RFID标签（11）接收具有预定频率（f）的AM（幅度调制）波（20）并用于从AM 波（20），与所述AM波（20）的预定正或负幅度相关联的解调输出（6a），所述解调输出具有频率为F的部分.AM解调系统至少包括第二解调器（26）用于接收AM波（20）并检索与预定正或负幅度相反的幅度相关联的第二解调输出（26a），所述第二解调输出具有所述频率F的一部分; RFID读取器包括在输入中具有解调输出（6a）和第二解调输出（26a）并且在输出端返回具有频率（f1）倍的部分的强制解调输出（30）的块（27）相对于所述频率（F）。

43. 发明申请

US20100098193A1 APPARATUS AND METHOD FOR CLASSIFYING MODULATIONS IN MULTIPATH ENVIRONMENTS 有权
标题翻译：用于在多个环境中分类调制的装置和方法
公开(公告)号：US20100098193A1
公开(公告)日：2010-04-22
申请号：US12450215
申请日：2007-03-16
申请人： Peng Liu , Li Zou
发明人： Peng Liu , Li Zou
IPC分类号： H04L27/00 , H04L27/22 , H03D1/02
CPC分类号： H04L27/0012 , H04L27/2601
摘要： A receiver supports a single carrier (SC) form of modulation and a multi-carrier form of modulation such as orthogonal frequency division multiplexing (OFDM). Upon receiving a signal, the receiver determines a maximum fluctuation range (MFR) as a function of at least a fourth-order cumulant of a received signal; and classifies a modulation type of the received signal as a function of the determined maximum fluctuation range. After determining the modulation type of the received signal, the receiver switches to that modulation mode to recover data from the received signal.
摘要翻译：接收机支持单载波（SC）形式的调制和诸如正交频分复用（OFDM）的多载波调制形式。在接收到信号时，接收机确定作为接收信号的至少四阶累积量的函数的最大波动范围（MFR）; 并且根据确定的最大波动范围对接收信号的调制类型进行分类。在确定接收信号的调制类型之后，接收机切换到该调制模式以从接收到的信号中恢复数据。

44. 发明授权

US5815035A Demodulating circuit, demodulating apparatus, demodulating method, and modulating/demodulating system of acoustic signals 失效
标题翻译：解调电路，解调装置，解调方法以及声信号的调制/解调系统
公开(公告)号：US5815035A
公开(公告)日：1998-09-29
申请号：US816376
申请日：1997-03-13
申请人： Shinichi Yamagishi , Noritaka Egami
发明人： Shinichi Yamagishi , Noritaka Egami
IPC分类号： H03D1/00 , E21B47/16 , H03D1/02 , H03H9/22 , H04L27/06 , H04L27/22 , H04L27/233 , G01V3/00
CPC分类号： H03D1/02 , E21B47/16 , H04L27/2335
摘要： A demodulating method wherein the signal can be demodulated accurately even if the S/N ratio is lower by calculating an amplitude peak value by a specific formula from two values of an amplitude of an acoustic signal corresponding to a phase difference of 90 degrees at a carrier frequency transmitted by an acoustic signal transmitter, setting a threshold level preliminarily for the amplitude peak value, and demodulating the amplitude peak value by binarization on the basis of the threshold level, and a demodulating circuit and a demodulating apparatus used in the execution thereof. It is further possible to follow up automatically even when the acoustic characteristics change by automatically calculating the average of peak values of output of the vibration sensor in a state not transmitting the acoustic signal, automatically setting the signal level by a formula predetermined on the basis of the obtained average, and automatically calculating the threshold level from the average of the peak values and the signal level.
摘要翻译：一种解调方法，其中即使S / N比较低，也可以通过在载波上计算对应于90度的相位差的声信号的振幅的特定公式的幅度峰值来精确地解调该信号通过声信号发送器发送的频率，对于振幅峰值预先设定阈值电平，并且基于阈值电平对二值化解调振幅峰值，以及在其执行中使用的解调电路和解调装置。即使当声学特性通过在不发送声信号的状态下自动计算振动传感器的输出的峰值的平均值而自动设定信号电平时，也可以自动跟踪，基于获得的平均值，并根据峰值和信号电平的平均值自动计算阈值电平。

45. 发明授权

US5339040A AM demodulation receiver using digital signal processor 失效
标题翻译： AM解调接收机采用数字信号处理器
公开(公告)号：US5339040A
公开(公告)日：1994-08-16
申请号：US89864
申请日：1993-07-09
申请人： Roger K. Loper
发明人： Roger K. Loper
IPC分类号： H03D1/22 , H04B1/30 , H03D1/02 , H04B1/26
CPC分类号： H04B1/30 , H03D1/2245
摘要： An amplitude modulated (AM) radio receiver uses a digital signal processor, responsive to in-phase (I) and quadrature-phase (Q) component signals, to compensate for carrier energy removed by a capacitive coupling circuit. A quadrature mixer converts the received AM signal to the I and Q component signals representative of the AM signal, and a signal filter passes a desired frequency segment of the I and Q component signals. A capacitive coupling circuit couples the I and Q component signals to provide representative I and Q signals with no DC bias to the input of an analog-to-digital converter. The analog-to-digital converter converts the representative unbiased I and Q signals to digital I and Q signals for processing by the digital signal processor. The digital signal processor then: (a) determines the absolute values of the I and Q digital signals; (b) compares the absolute value of the I digital signal to the absolute value of the Q digital signal and determines which value is greater; and in response to the outcome of the comparison, provides a digital output word as function of one of the following termsI.times.(1+((2).sup.1/2 -1) .vertline.Q/I.vertline.),Q.times.(1+((2).sup.1/2 -1) .vertline.I/Q.vertline.).A digital-analog converter then converts the digital output word to an analog signal representing the AM demodulated signal.
摘要翻译：调幅（AM）无线电接收机使用响应于同相（I）和正交相（Q）分量信号的数字信号处理器来补偿由电容耦合电路去除的载波能量。正交混频器将接收到的AM信号转换为表示AM信号的I和Q分量信号，并且信号滤波器通过I和Q分量信号的期望频率段。电容耦合电路耦合I和Q分量信号，以向模数转换器的输入提供没有DC偏置的代表性I和Q信号。模数转换器将代表性的无偏I和Q信号转换为数字I和Q信号，以供数字信号处理器处理。数字信号处理器然后：（a）确定I和Q数字信号的绝对值; （b）将I数字信号的绝对值与Q数字信号的绝对值进行比较，并确定哪个值较大; 并且响应于比较结果，提供一个数字输出字作为以下术语之一的函数Ix（1 +（（2）1 / 2-1）| Q / I |），Qx（1 +（（ 2）1 / 2-1）| I / Q |）。然后，数模转换器将数字输出字转换成表示AM解调信号的模拟信号。

46. 发明授权

US4451792A Auto-tuned frequency discriminator 失效
标题翻译：自动调频鉴频器
公开(公告)号：US4451792A
公开(公告)日：1984-05-29
申请号：US314162
申请日：1981-10-23
申请人： Michael J. Gay
发明人： Michael J. Gay
IPC分类号： H04N9/64 , H03D3/00 , H03D3/06 , H03J7/02 , H03D1/02 , H03D1/18 , H03D1/20
CPC分类号： H03J7/02 , H03D3/00
摘要： An integrable auto-tuned frequency discriminator is provided having a feedback circuit to tune the discriminator when an input signal having a reference frequency is applied at the input of the frequency discriminator. The input signal is multiplied by a delayed version thereof which is provided by a delay filter. The length of delay is varied by altering the transfer function of the delay filter in response to delay filter control inputs. The discriminator output is coupled to a feedback circuit which generates the control input signals, thereby tuning the delay filter to provide a discriminator output reference level. A control input to the feedback circuit provides the capability to tune the delay filter to a carrier frequency which is offset from the reference frequency. A gate input to the feedback circuit disables the feedback input after the frequency discriminator has been tuned.
摘要翻译：提供了一种可积分的自动调谐鉴频器，具有反馈电路，以便在具有参考频率的输入信号被施加在鉴频器的输入端时调谐鉴频器。输入信号乘以由延迟滤波器提供的延迟版本。通过响应于延迟滤波器控制输入改变延迟滤波器的传递函数来改变延迟的长度。鉴频器输出耦合到产生控制输入信号的反馈电路，从而调谐延迟滤波器以提供鉴别器输出参考电平。对反馈电路的控制输入提供了将延迟滤波器调谐到偏离参考频率的载波频率的能力。反馈电路的栅极输入在鉴频器调谐后禁用反馈输入。

47. 发明授权

US4163989A Detector circuit for color television receivers 失效
标题翻译：彩色电视接收机检测电路
公开(公告)号：US4163989A
公开(公告)日：1979-08-07
申请号：US903003
申请日：1978-05-04
申请人： Susumu Akazawa , Kyoichi Murakami , Kiyoshi Ishihata , Takao Tsuchiya
发明人： Susumu Akazawa , Kyoichi Murakami , Kiyoshi Ishihata , Takao Tsuchiya
IPC分类号： H03D1/18 , H04N9/68 , H04N9/71 , H04N9/535 , H03D1/02
CPC分类号： H04N9/68 , H04N9/71
摘要： A detector circuit for a color television receiver includes a pair of transistors whose collector-emitter circuits are connected in parallel with each other, an input circuit, such as a differential amplifier, for supplying a differential input signal to the base electrodes of the pair of transistors, an impedance element coupled between the collector electrodes of the pair of transistors and a voltage source, and an integration circuit for integrating a detected signal taken from the collector electrodes of the pair of transistors and thereby providing an output signal. A reference-voltage circuit is included to supply a reference voltage, which can be used as a threshold voltage, to the emitter electrodes of the pair of transistors. The detector circuit is advantageously used in the color demodulating circuit of a color television receiver, wherein an oscillator controlled by color burst signals supplies the input signal to the detector circuit, and the output thereof is used to control the gain of an ACC amplifier.
摘要翻译：用于彩色电视接收机的检测器电路包括一对晶体管，其集电极 - 发射极彼此并联连接;输入电路，例如差分放大器，用于将差分输入信号提供给该对晶体管，耦合在该对晶体管的集电极之间的阻抗元件和电压源，以及积分电路，用于对从该对晶体管的集电极获取的检测信号进行积分，从而提供输出信号。包括参考电压电路，以将可用作阈值电压的参考电压提供给该对晶体管的发射极。检测器电路有利地用在彩色电视接收机的彩色解调电路中，其中由色同步信号控制的振荡器将输入信号提供给检测器电路，并且其输出用于控制ACC放大器的增益。

48. 发明授权

US3891927A Phase correction device for demodulation of bipolar signals 失效
标题翻译：用于双极性信号解调的相位校正装置
公开(公告)号：US3891927A
公开(公告)日：1975-06-24
申请号：US38055773
申请日：1973-07-19
申请人： CIT ALCATEL
发明人： FILAFERRO RENE , HEBERT FRANCOIS
IPC分类号： H04L27/06 , H03D1/02 , H04B1/16
CPC分类号： H04L27/066
摘要： Phase correction device for a 2880 c/s carrier which is used for transporting the received band to the basic band (0 - 2400 c/s), the correction being based on characteristics relating to the form of the signal in the basic band.
摘要翻译：用于将接收频带传送到基本频带（0-200c / s）的2880c / s载波的相位校正装置，该校正基于与基本频带中信号形式有关的特性。

49. 发明授权

US3852676A Detector circuit 失效
标题翻译：检测电路
公开(公告)号：US3852676A
公开(公告)日：1974-12-03
申请号：US35468173
申请日：1973-04-26
申请人： SONY CORP
发明人： HONGU M , IKEDA I
IPC分类号： H03D1/02 , H03D1/06 , H03D1/18
CPC分类号： H03D1/18
摘要： The detector circuit is divided into two parts, a signal current input section and a detector section. The signal current input section includes an input terminal which is supplied with a signal to be detected and which is connected to the base electrode of a first transistor whose collector electrode is connected through a first impedance to a first terminal of a voltage source and whose emitter electrode is connected through a second impedance to a second terminal of a voltage source. The detector section includes a second transistor whose collector electrode is connected through a load impedance to the first terminal of the voltage source and whose emitter electrode is connected through a diode to a second terminal of the voltage source, the diode being connected such that its conductive polarity is the same as the conductive polarity of the junction between the base and emitter electrodes of the second transistor with respect to the voltage source. Means are provided for connecting the emitter electrode of the second transistor to the collector electrode of the first transistor and the base electrode of the second transistor is based so that a small current flows through the second transistor and the diode when no input signal current is supplied. The output from the detector circuit is delivered at the collector electrode of the second transistor so that the detector circuit operates with great linearity over a wide range of input signal values.
摘要翻译：检测器电路分为信号电流输入部分和检测器部分两部分。信号电流输入部分包括输入端子，该输入端子被提供有要被检测的信号，该输入端子连接到集电极通过第一阻抗连接到电压源的第一端子的第一晶体管的基极，并且其发射极电极通过第二阻抗连接到电压源的第二端子。检测器部分包括第二晶体管，其集电极通过负载阻抗连接到电压源的第一端，并且其发射极通过二极管连接到电压源的第二端，二极管连接成使其导电极性与第二晶体管的基极和发射极之间的相对于电压源的结的导电极性相同。提供了用于将第二晶体管的发射电极连接到第一晶体管的集电极的装置，并且第二晶体管的基极基于如下原因：当没有输入信号电流时，小电流流过第二晶体管和二极管。检测器电路的输出在第二晶体管的集电极处传送，使得检测器电路在宽范围的输入信号值上以大的线性运行。

50. 发明授权

US2419570A Receiver circuit 失效
标题翻译：接收电路
公开(公告)号：US2419570A
公开(公告)日：1947-04-29
申请号：US48818343
申请日：1943-05-24
申请人： STANDARD TELEPHONES CABLES LTD
发明人： EMILE LABIN , GRIEG DONALD D
IPC分类号： F24C3/00 , F24C5/18 , H03D1/02 , H03K9/00
CPC分类号： A62B13/00 , H03K9/00

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