公开(公告)号：US20090252252A1

公开(公告)日：2009-10-08

申请号：US12192933

申请日：2008-08-15

Applicant: Namsoo Kim ,  Prasad S. Gudem ,  Vladimir Aparin

Inventor： Namsoo Kim ,  Prasad S. Gudem ,  Vladimir Aparin

IPC: H04L27/02

CPC classification number: H03D7/163 ,  H03D7/1466 ,  H03D7/166

Abstract: A communication channel has a highly linear switched current mixer that incorporates passive filtering (e.g., low pass, notch) for improved transmitting (Tx) and receiving (Rx) with adding external filtering components. A high IIP2 (input referenced second order intercept point) of the receiver at the Tx offset is essential to avoid corrupting the system's sensitivity performance, and a high triple beat (TB) is required to avoid sensitivity degradation due to transmitter leakage. Thanks to the embedded filtering in the mixer and the active post-distortion (APD) method in a low noise amplifier (LNA), the required high linearity is achieved with low noise figure and power consumption, overcoming transmitter power leakage without the use of a SAW (surface acoustic wave) filter.

Abstract translation: 通信通道具有高度线性的开关电流混频器，其结合无源滤波（例如，低通，陷波），用于增加外部滤波组件以改善发射（Tx）和接收（Rx）。 接收机在Tx偏移处的高IIP2（输入参考二阶截取点）对于避免破坏系统的灵敏度性能至关重要，并且需要高三重（TB）以避免由于发射机泄漏导致的灵敏度劣化。 由于混频器中的嵌入式滤波器和低噪声放大器（LNA）中的有源后失真（APD）方法，所需的高线性度可通过低噪声系数和功耗实现，克服发射机功率泄漏而不使用 SAW（表面声波）滤波器。

公开(公告)号：US20090081982A1

公开(公告)日：2009-03-26

申请号：US11860281

申请日：2007-09-24

Applicant: Ahmadreza Rofougaran ,  Maryam Rofougaran

Inventor： Ahmadreza Rofougaran ,  Maryam Rofougaran

IPC: H04B1/26

CPC classification number: H04B1/1036 ,  H03D7/163

Abstract: Aspects of a method and system for a distributed transceiver for high frequency applications may include generating a second signal from a first signal by frequency-translating the first signal via a plurality of conversion stages. Each of the plurality of conversion stages may frequency-translate a corresponding input signal by a local oscillator frequency or by a fraction of said local oscillator frequency, and each of the plurality of conversion stages may comprise a multiplier and a notch filter. The first signal may be the corresponding input signal to an initial stage of a the plurality of conversion stages, an output signal of a previous one of the plurality of conversion stages may be the corresponding input signal to a subsequent one of the plurality of conversion stages, and the second signal may be an output signal of a final stage of the plurality of conversion stages.

Abstract translation: 用于高频应用的分布式收发器的方法和系统的方面可以包括通过经由多个转换级频率转换第一信号从第一信号产生第二信号。 多个转换级中的每一个可以通过本地振荡器频率或所述本地振荡器频率的一部分对相应的输入信号进行频率转换，并且多个转换级中的每一个可以包括乘法器和陷波滤波器。 第一信号可以是到多个转换级的初始阶段的相应输入信号，多个转换级中的前一个转换级的输出信号可以是到多个转换级中的后续的一个转换级的相应输入信号 并且第二信号可以是多个转换级的最后级的输出信号。

公开(公告)号：US07394874B2

公开(公告)日：2008-07-01

申请号：US11676652

申请日：2007-02-20

Applicant: Alexander Neil Birkett ,  James Stuart Wight

Inventor： Alexander Neil Birkett ,  James Stuart Wight

IPC: H04L27/16

CPC classification number: H04B1/30 ,  H03D7/163 ,  H04B1/26

Abstract: A multi-channel RF receiver uses an image rejection mixer (e.g. double quadrature mixer) in the IF down conversion stage for image side band rejection (whereby use of an IF narrow band filter for image rejection may be omitted if desired) and comprises a simplified frequency synthesizer which generates both a “wandering” IF oscillator frequency and an RF oscillator frequency for the up/down conversion stages (being, for down conversion, from RF to IF and from IF to base band. The IF used for a particular RF carrier (channel) is selected so as to be both an integer (N) sub-harmonic of that RF carrier and within the operating frequency band of the image rejection mixer. Advantageously, the synthesizer comprises only one loop and one VCO, wherein the IF oscillator signal is produced from the RF oscillator signal by means of a frequency divider.

Abstract translation: 多频道RF接收机在用于图像边带抑制的IF下变频级中使用镜像抑制混频器（例如，双正交混频器）（因此，如果需要，则可以省略使用IF窄带滤波器用于图像抑制），并且包括简化的 频率合成器，其产生用于上/下转换级的“漂移”IF振荡器频率和RF振荡器频率（用于从RF到IF以及从IF到基带的下变频。用于特定RF载波的IF （信道）被选择成既是该RF载波的整数（N）次谐波，并且在图像抑制混频器的工作频带内，有利的是，合成器仅包括一个环路和一个VCO，其中IF振荡器 通过分频器从RF振荡器信号产生信号。

公开(公告)号：US07321754B2

公开(公告)日：2008-01-22

申请号：US10486332

申请日：2002-08-01

Applicant: Emil Zellweger ,  Yves Oesch ,  Kilian Imfeld ,  Pierre-André Farine

Inventor： Emil Zellweger ,  Yves Oesch ,  Kilian Imfeld ,  Pierre-André Farine

IPC: H04B1/10

CPC classification number: H03D3/007 ,  H03D7/163

Abstract: The radio-frequency signal frequency conversion device generates intermediate complex signals (IF) for a correlation stage of a low power RF receiver. In order to do this, the device includes a first selective pass-band filter for filtering radio-frequency signals picked up by an antenna. A frequency synthesizer generates first and second high frequency signals, wherein the frequency of the first signals is higher than the frequency of the second signals. This synthesizer receives reference signals from an oscillator unit. A first mixer unit mixes the radio-frequency signals with the first signals in order to generate frequency-converted signals. A second pass-band filter filters the signals from the first mixer unit, and provides signals to a second mixer unit to mix them with the second high frequency signals. Finally, shaping means for the signals provided by the second mixer unit generate the intermediate signals. The second filter is a not very selective active filter, which is integrated, in an RF/IF integrated circuit with the first and second mixer units, the signal shaping means, and certain parts of the synthesizer and the oscillator unit.

Abstract translation: 射频信号频率转换装置为低功率RF接收机的相关级产生中间复合信号（IF）。 为了做到这一点，该装置包括用于滤波由天线拾取的射频信号的第一选择性通带滤波器。 频率合成器产生第一和第二高频信号，其中第一信号的频率高于第二信号的频率。 该合成器从振荡器单元接收参考信号。 第一混频器单元将射频信号与第一信号混合，以产生频率转换的信号。 第二通带滤波器对来自第一混频器单元的信号进行滤波，并向第二混频器单元提供信号以将它们与第二高频信号进行混频。 最后，由第二混频器单元提供的信号的整形装置产生中间信号。 第二滤波器是不是非常有选择的有源滤波器，它被集成在与第一和第二混频器单元的RF / IF集成电路，信号整形装置以及合成器的某些部分和振荡器单元中。

公开(公告)号：US20070218850A1

公开(公告)日：2007-09-20

申请号：US11575803

申请日：2005-09-29

Applicant: Jianping Pan

Inventor： Jianping Pan

IPC: H04B1/18

CPC classification number: H03J7/02 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/1483 ,  H03D7/1491 ,  H03D7/163 ,  H03D7/165 ,  H03D7/18 ,  H03D2200/0025 ,  H03D2200/0047 ,  H03J7/04 ,  H04B1/28

Abstract: A highly integrated terrestrial and cable tuner for receiving digital and analog television signals is disclosed. It achieves high performances in sensitivity, image rejection, dynamic range, channel selectivity and power consumption. A major-images rejection converter disclosed rejects third- and fifth-order images. Thus it significantly relaxes RF filter design in a tuner of a single-stage or a first-stage zero-IF/low-IF downconversion architecture. Different architectures and frequency planning are disclosed in accordance with specifications of TV standards to improve the overall performance of the tuner with a different or configurable IF output. The tuner is integrated by using standard processes, with minimal off-chip components excluding SAW and LC filters. Small tuner modules cost less than discrete (can) tuners. They can be used in digital/analog TV sets and portable and handheld TV devices and for mobile-phone TV reception.

Abstract translation: 公开了用于接收数字和模拟电视信号的高度集成的地面和电缆调谐器。 它在灵敏度，图像抑制，动态范围，通道选择性和功耗方面实现了高性能。 公开的主要图像拒绝转换器拒绝第三和第五阶图像。 因此，它在单级或第一级零中频/低中频下变频架构的调谐器中显着放宽了RF滤波器设计。 根据电视标准的规范公开了不同的架构和频率规划，以改进具有不同或可配置的中频输出的调谐器的整体性能。 调谐器通过使用标准过程进行集成，除了SAW和LC滤波器之外，还有最少的片外组件。 小调谐器模块的成本低于离散（can）调谐器。 它们可用于数字/模拟电视机，便携式和手持式电视设备以及手机电视接收中。

公开(公告)号：US07224948B1

公开(公告)日：2007-05-29

申请号：US10148960

申请日：2000-01-11

Applicant: Taizo Yamawaki ,  Satoshi Tanaka ,  Masaru Kokubo ,  Kazuo Watanabe ,  Masumi Kasahara ,  Kazuaki Hori ,  Julian Hildersley

Inventor： Taizo Yamawaki ,  Satoshi Tanaka ,  Masaru Kokubo ,  Kazuo Watanabe ,  Masumi Kasahara ,  Kazuaki Hori ,  Julian Hildersley

IPC: H04B1/04 ,  H01Q11/12

CPC classification number: H03C3/0983 ,  H03C3/0925 ,  H03C3/0966 ,  H03D7/163 ,  H03J2200/17 ,  H03L7/23 ,  H04B1/0475 ,  H04B2001/0491 ,  H04L25/03343

Abstract: There are provided a transmitter and a wireless communication terminal apparatus using the same for solving a problem of undesired spurs due to harmonics of an output signal of a frequency synthesizer, and further solving a problem of the undesired spurs occurring when the harmonics of an output signal of a crystal oscillator are mixed into a VCO to facilitate to design a circuit or a mounting substrate. The transmitter has a relationship between an output frequency of a PLL frequency conversion circuit (5) and output frequencies of frequency synthesizers (1, 2) stored therein, and the output frequencies of the frequency synthesizers (1, 2) input into the PLL frequency conversion circuit (5) are controlled on the basis of the relationship so that the undesired spurs are suppressed. Thereby, even when the undesired spurs occur in the output of the transmitter due to a crosstalk between circuits or through a substrate, which can be easily suppressed, it is therefore possible to reduce time and cost for redesigning the circuit or the substrate.

Abstract translation: 提供了一种使用该发送器和无线通信终端装置的方法，用于解决由于频率合成器的输出信号的谐波引起的不期望的杂散问题，并且进一步解决了当输出信号的谐波发生时出现的不需要的杂散的问题 的晶体振荡器混合到VCO中以便于设计电路或安装衬底。 发射机具有PLL频率转换电路（5）的输出频率和存储在其中的频率合成器（1,2）的输出频率与输入到PLL频率的频率合成器（1,2）的输出频率之间的关系 基于该关系来控制转换电路（5），从而抑制不需要的杂散。 因此，即使由于电路之间的串扰或通过可以容易地抑制的基板而在发射机的输出端发生不想要的杂散，因此可以减少重新设计电路或基板的时间和成本。

公开(公告)号：US07047196B2

公开(公告)日：2006-05-16

申请号：US09785375

申请日：2001-02-16

Applicant: Theodore Calderone ,  Paul M. Cook ,  Mark J. Foster

Inventor： Theodore Calderone ,  Paul M. Cook ,  Mark J. Foster

IPC: G10L21/00

CPC classification number: H04N21/23106 ,  G06Q20/102 ,  G06Q30/04 ,  G06Q30/0603 ,  G10L15/30 ,  H03D7/163 ,  H04L7/02 ,  H04L45/06 ,  H04M3/385 ,  H04M3/4936 ,  H04M7/006 ,  H04M2201/40 ,  H04N5/4403 ,  H04N7/17318 ,  H04N7/17336 ,  H04N21/233 ,  H04N21/23805 ,  H04N21/2543 ,  H04N21/2743 ,  H04N21/42203 ,  H04N21/42204 ,  H04N21/4415 ,  H04N21/4622 ,  H04N21/47202 ,  H04N21/478 ,  H04N21/4782 ,  H04N21/8106 ,  H04N2005/4428

Abstract: A method and system of speech recognition presented by a back channel from multiple user sites within a network supporting cable television and/or video delivery is disclosed. The preferred embodiment of the invention comprises ans system and method of using a back channel containing a multiplicity of identified speech channels from a multiplicity of user sites presented to a speech processing system at a wireline node in a network that supports at least one of cable television delivery and video delivery. One embodiment of the invention comprises a method having the steps of receiving the back channel to create a received back channel; partitioning the received back channel into a multiplicity of received identified speech channels; processing the multiplicity of received identified speech channels to create a multiplicity of identified speech content; and responding to the identified speech content to create an identified speech content response that is unique, for each of the multiplicity of identified speech contents.

Abstract translation: 公开了一种由支持有线电视和/或视频传送的网络内的多个用户站点的后向信道呈现的语音识别方法和系统。 本发明的优选实施例包括ans系统和方法，其使用包含来自网络中的有线节点处呈现给语音处理系统的多个用户站点的多个所识别的语音信道的后向信道，所述网络节点支持有线电视 交付和视频传送。 本发明的一个实施例包括一种方法，该方法具有以下步骤：接收所述反向信道以创建接收的反向信道; 将接收的反向信道划分成多个接收的识别语音信道; 处理所接收的所识别的语音信道的多个，以创建多个所识别的语音内容; 以及响应于所识别的语音内容，以针对所识别的多个语音内容中的每一个创建唯一的所识别的语音内容响应。

公开(公告)号：US07039375B2

公开(公告)日：2006-05-02

申请号：US10323576

申请日：2002-12-19

Applicant: Satoshi Roppongi

Inventor： Satoshi Roppongi

IPC: H04B1/18

CPC classification number: H03D7/163

Abstract: The invention provides an up/down converter with low phase noise. Signals from a first local oscillator are fed through a power splitter to first and second mixers. Signals from a second local oscillator and signals from the power splitter are mixed by the second mixer. The frequency component of the difference between the two signals is removed by a first bandpass filter and passed to a third mixer. Input signals are mixed with signals from the power splitter by the first mixer, and the lower frequency component of the output signals from the first mixer is removed by a second bandpass filter and is passed to the third mixer. Signals from the first and second bandpass filters are mixed by the third mixer. The higher frequency component of the output signals is removed by a low pass filter and is output.

公开(公告)号：US20060080106A1

公开(公告)日：2006-04-13

申请号：US11283176

申请日：2005-11-17

Applicant: Theodore Calderone ,  Paul Cook ,  Mark Foster

Inventor： Theodore Calderone ,  Paul Cook ,  Mark Foster

IPC: G10L21/00

CPC classification number: H04N21/23106 ,  G06Q20/102 ,  G06Q30/04 ,  G06Q30/0603 ,  G10L15/30 ,  H03D7/163 ,  H04L7/02 ,  H04L45/06 ,  H04M3/385 ,  H04M3/4936 ,  H04M7/006 ,  H04M2201/40 ,  H04N5/4403 ,  H04N7/17318 ,  H04N7/17336 ,  H04N21/233 ,  H04N21/23805 ,  H04N21/2543 ,  H04N21/2743 ,  H04N21/42203 ,  H04N21/42204 ,  H04N21/4415 ,  H04N21/4622 ,  H04N21/47202 ,  H04N21/478 ,  H04N21/4782 ,  H04N21/8106 ,  H04N2005/4428

Abstract: A method and system of speech recognition presented by a back channel from multiple user sites within a network supporting cable television and/or video delivery is disclosed.

公开(公告)号：US06931237B2

公开(公告)日：2005-08-16

申请号：US10275398

申请日：2002-02-21

Applicant: Shinji Miya ,  Nobuo Saito

Inventor： Shinji Miya ,  Nobuo Saito

IPC: H03D7/16 ,  H04B1/40 ,  H04B15/04 ,  H04B15/06 ,  H04B1/06 ,  H04B1/44

CPC classification number: H03D7/163 ,  H03D7/16 ,  H04B1/403 ,  H04B15/04 ,  H04B15/06

Abstract: A communication apparatus is provided which employs two oscillators to generate a transmission signal and a reception signal, and prevents harmful spurious components from being produced. As shown in FIGS. 9A and 9B, the oscillation frequency fVCO2 of a VCO 2 is given by fVCO2=N×(2×fDD), where fDD is the difference between the transmit frequency fT and receive frequency fR. A 3/(2×N) frequency multiplier outputs a signal with a frequency 3×fDD, and a divide-by-N circuit (2/(2×N) frequency multiplier) outputs a signal with a frequency 2×fDD. Thus the transmit intermediate frequency fTIF is given by fTIF=3×fDD, and the receive intermediate frequency fRIF is given by fRIF=2×fDD. The oscillation frequency fVCO1 of a VCO 1 is fCH. The transmit frequency fT is given by fT=fCH+fTIF=fCH+3×fDD. The circuit can prevent a transmission spurious problem to its own reception band.

Abstract translation: 提供一种通信装置，其采用两个振荡器来产生发送信号和接收信号，并且防止产生有害的杂散成分。 如图 在图9A和9B中，VCO2的振荡频率fVCO 2由fVCO 2 = Nx（2xfDD）给出，其中fDD是发射频率fT和接收频率fR之间的差。 3 /（2xN）倍频器输出频率为3xfDD的信号，并且N分频电路（2 /（2xN）倍频器）输出频率为2xfDD的信号。 因此，发射中频fTIF由fTIF = 3×fDD给出，接收中频fRIF由fRIF = 2xfDD给出。 VCO1的振荡频率fVCO 1为fCH。 发射频率fT由fT = fCH + fTIF = fCH + 3xfDD给出。 该电路可以防止传输杂散问题到其自己的接收频带。