公开(公告)号：US20190207632A1

公开(公告)日：2019-07-04

申请号：US15856821

申请日：2017-12-28

申请人： Rohde & Schwarz GmbH & Co. KG

发明人： Gottfried Holzmann ,  Martin Roth ,  Martin Oetjen

IPC分类号： H04B1/00 ,  H03D1/22

CPC分类号： H04B1/0032 ,  H03C3/40 ,  H03C2200/0058 ,  H03D1/22 ,  H03D3/007 ,  H03D2200/0082 ,  H04B1/0014

摘要： Techniques related to signal processing include setting up a first operation mode or a second operation mode. In the first operation mode: providing a first analogue signal to a first A/D converter by a first switch and a second analogue signal to a second A/D by second switch, and converting the first analogue signal to a first digital signal by the first A/D and the second analogue signal to a second digital signal by the second A/D. In the second operation mode: demodulating a third analogue signal to an in-phase signal and a quadrature signal by an I-Q-demodulator, providing the in-phase signal to the first A/D by the first switch, providing the quadrature signal to a second A/D by second switch, converting the in-phase signal to a third digital signal by the first A/D, and converting the quadrature signal to a fourth digital signal by the second A/D.

公开(公告)号：US09712198B1

公开(公告)日：2017-07-18

申请号：US15156986

申请日：2016-05-17

申请人： Samsung Electronics Co., Ltd.

发明人： Quan Zhou ,  Zhiyu Yang

IPC分类号： H04B1/40 ,  H04B17/00 ,  H04W24/00 ,  H04B1/10 ,  H03D7/16 ,  H04B17/21 ,  H04B1/30

CPC分类号： H04B17/21 ,  H03D7/165 ,  H03D7/18 ,  H03D2200/0045 ,  H03D2200/005 ,  H03D2200/0052 ,  H03D2200/0066 ,  H03D2200/0082 ,  H03D2200/0088

摘要： An apparatus and method. The method includes filtering an output of an in-phase (I-mixer); filtering an output of a quadrature-mixer (Q-mixer); converting an output of a first low pass filter (LPF); converting an output of a second LPF; buffering an output of a first analog-to-digital converter (ADC); buffering an output of a second ADC; buffering a transmitter signal; generating a reference signal from an output of a transmitter (TX) data capture buffer; removing DC from the reference signal; and adaptively tuning an I-mixer digital-to-analog (DAC) code and a Q-mixer DAC code from an output of a first receiver (RX) data capture buffer, an output of a second RX data capture buffer, an output of a DC removal unit, and a predetermined step size for each of the I-mixer DAC code and the Q-mixer DAC code.

公开(公告)号：US09497578B2

公开(公告)日：2016-11-15

申请号：US14935103

申请日：2015-11-06

申请人： Broadcom Corporation

发明人： Philip Stewart Royston

IPC分类号： H04B5/00 ,  H04W4/00 ,  H04B1/10 ,  H04B1/12 ,  H04W52/04 ,  H04B17/21 ,  H04B17/26 ,  H03G3/30

CPC分类号： H04W4/80 ,  H03D2200/0082 ,  H03G3/3042 ,  H03G3/3052 ,  H04B1/1027 ,  H04B1/123 ,  H04B5/0025 ,  H04B5/0075 ,  H04B17/21 ,  H04B17/26 ,  H04W52/04

摘要： A near field communications (NFC) device is disclosed that is capable of optimizing a gain for received signals. Measurements are made of signals received from an NFC environment and are compared to one or more threshold hold values. Based on the comparison, it is determined whether the measurements indicate underamplification or overamplification. Depending on the results of the analysis, one or more components within the NFC device is adjusted to increase or decrease the gain, respectively. The measurements may be taken during an unloaded baseline state or during loading, and may be compared to previous measurements to estimate their accuracy.

公开(公告)号：US20140342684A1

公开(公告)日：2014-11-20

申请号：US14449448

申请日：2014-08-01

申请人： Ioannis Papananos

发明人： Ioannis Papananos

IPC分类号： H04B1/10 ,  H04B1/16

CPC分类号： H04B1/10 ,  H01L21/8232 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D7/18 ,  H03D2200/0082 ,  H04B1/16

摘要： A passive implementation of an image reject mixer (IRM), capable of operating at very high frequency, is manufactured in a variety of silicon processes. The IRM comprises a quad MOS multiplier and a lumped-element hybrid, resulting in a passive IRM, operative at radio frequencies (RF) of tens of GHz with an intermediate frequency (IF) of several GHz. The RF+ and RF− signals are provided to two quad MOS multipliers. A local oscillator signal (LO) is used to provide LO+ and LO− signals to one of the multipliers and by providing the LO to a phase shifter, generated are a ninety degree shifted LO+ and LO− signals provided to the other multiplier. Providing the hybrids with the outputs of both multipliers and selecting an appropriate IF signal from each of the hybrids ensures the proper operation of the passive IRM.

摘要翻译： 能够以非常高的频率工作的图像拒绝混合器（IRM）的被动实现在各种硅工艺中制造。 IRM包括四极MOS乘法器和集总元件混合电路，产生无源IRM，在几GHz的射频（RF）下工作，中频（IF）为几GHz。 RF +和RF信号被提供给两个四个MOS乘法器。 使用本地振荡器信号（LO）来向乘法器之一提供LO +和LO信号，并且通过向移相器提供LO，产生的是提供给另一乘法器的90度移位的LO +和LO信号。 为混合器提供两个乘法器的输出并从每个混合电路中选择适当的IF信号，确保被动IRM的正常运行。

公开(公告)号：US20140091849A1

公开(公告)日：2014-04-03

申请号：US14042054

申请日：2013-09-30

申请人： ViaSat, Inc.

发明人： Rob Zienkewicz ,  Kenneth Buer

IPC分类号： H03D7/14

CPC分类号： H03D7/1458 ,  H03D7/165 ,  H03D7/18 ,  H03D2200/0082

摘要： A double balanced image reject mixer (IRM) can be configured to comprise: a common radio frequency (RF) port; four mixer devices, each comprising an intermediate frequency (IF) port, an RF port and an local oscillator (LO) port; and a four-way, in-phase splitter/combiner. The four-way, in-phase splitter/combiner can be connected between the RF common port and the RF port of each of the four mixer devices. A method of performing spurious suppression and image reject mixing in a double balanced IRM, can comprise: directly in-phase combining radio frequency (RF) output signals of four mixer devices located in the double balanced IRM; and phase pairing local oscillator (LO) signals and intermediate frequency (IF) signals such that the combination of the phases of the respective IF and LO signals can result in substantially equal phase RF signals at the RF ports of all four mixer devices.

摘要翻译： 双平衡图像拒绝混合器（IRM）可以被配置为包括：公共射频（RF）端口; 四个混频器设备，每个混频器设备包括中频（IF）端口，RF端口和本地振荡器（LO）端口; 和四路同相分路器/组合器。 四路同相分路器/组合器可以连接在四个混频器设备中的每个的RF公共端口和RF端口之间。 在双平衡IRM中执行伪抑制和图像拒绝混合的方法可以包括：直接同步地组合位于双平衡IRM中的四个混频器设备的射频（RF）输出信号; 以及相位配对本地振荡器（LO）信号和中频（IF）信号，使得各个IF和LO信号的相位的组合可导致在所有四个混频器装置的RF端口处的基本相等的相位RF信号。

公开(公告)号：US20130216004A1

公开(公告)日：2013-08-22

申请号：US13443281

申请日：2012-04-10

申请人： Terng-Yin Hsu ,  Wei-Chi Lai ,  Shao-Ying Yeh ,  Tsung-Yu Tsai

发明人： Terng-Yin Hsu ,  Wei-Chi Lai ,  Shao-Ying Yeh ,  Tsung-Yu Tsai

IPC分类号： H03D3/00

CPC分类号： H03D3/009 ,  H03D2200/0082 ,  H04L27/2647 ,  H04L27/3863 ,  H04L2027/0083

摘要： A receiver having Inphase-Quadrature (I-Q) imbalance compensation and an I-Q imbalance compensation method thereof are provided. The receiver calculates a cross-ratio parameter according to a first ideal receiving value and a first ideal conjugate receiving mirror of a first receiving signal and a second ideal receiving value and a second ideal conjugate receiving mirror of a second receiving signal. The receiver calculates an I-Q imbalance compensation parameter according to the cross-ratio parameter, the first ideal receiving value, the first ideal conjugate receiving mirror, the second ideal receiving value, the second ideal conjugate receiving mirror, the first receiving signal and the second receiving signal. The receiver compensates a third receiving signal according to the I-Q imbalance compensation parameter.

摘要翻译： 提供具有同相正交（I-Q）不平衡补偿和I-Q不平衡补偿方法的接收机。 接收机根据第一接收信号的第一理想接收值和第一接收信号的第一理想共轭接收镜和第二接收信号的第二理想接收值和第二理想共轭接收镜来计算交叉比参数。 接收机根据交比参数，第一理想接收值，第一理想共轭接收镜，第二理想接收值，第二理想共轭接收镜，第一接收信号和第二接收器来计算IQ不平衡补偿参数 信号。 接收机根据I-Q不平衡补偿参数补偿第三个接收信号。

公开(公告)号：US08331896B2

公开(公告)日：2012-12-11

申请号：US12832964

申请日：2010-07-08

申请人： Ioannis Papananos

发明人： Ioannis Papananos

IPC分类号： H04B1/10

CPC分类号： H04B1/10 ,  H01L21/8232 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D7/18 ,  H03D2200/0082 ,  H04B1/16

摘要： A passive implementation of an image reject mixer (IRM), capable of operating at very high frequency, is operative according to the disclosed method. The IRM comprises a quad MOS multiplier and a lumped-element hybrid, resulting in a passive IRM. Operative at a radio frequency (RF) of tens of GHz with an intermediate frequency (IF) of several GHz. The RF+ and RF− signals are provided to two quad MOS multipliers. A local oscillator signal (LO) is used to provide LO+ and LO− signals to one of the multipliers and by providing the LO to a phase shifter, generated are a ninety degree shifted LO+ and LO− signals provided to the other multiplier. Providing the hybrids with the outputs of both multipliers and selecting an appropriate IF signal from each of the hybrids ensures the proper operation of the passive IRM.

摘要翻译： 根据所公开的方法，能够以非常高的频率工作的图像拒绝混合器（IRM）的被动实现是可操作的。 IRM包括四极MOS乘法器和集总元件混合，产生无源IRM。 在几GHz的射频（RF）下工作，中频（IF）为几GHz。 RF +和RF信号被提供给两个四个MOS乘法器。 使用本地振荡器信号（LO）来向乘法器之一提供LO +和LO信号，并且通过向移相器提供LO，产生的是提供给另一乘法器的90度移位的LO +和LO信号。 为混合器提供两个乘法器的输出并从每个混合电路中选择适当的IF信号，确保被动IRM的正常运行。

公开(公告)号：US08275338B2

公开(公告)日：2012-09-25

申请号：US12828004

申请日：2010-06-30

申请人： Ioannis Papananos

发明人： Ioannis Papananos

IPC分类号： H04B1/10 ,  H04B7/00

CPC分类号： H03D7/18 ,  H03D7/1458 ,  H03D7/1466 ,  H03D7/165 ,  H03D2200/0082

摘要： The apparatus is a complete passive implementation of an image reject mixer (IRM) that is capable of operating at very high frequency. Using a hybrid as part of the IRM circuit enables operation at very high frequencies that also employs a high intermediate frequency (IF). All the components of the design are passive and implementable in MOS technologies providing significant cost and implementation advantages. Furthermore, the apparatus is operative at frequencies that are higher than several tens of GHz.

摘要翻译： 该装置是能够以非常高的频率操作的图像拒绝混合器（IRM）的完全无源实现。 使用混合电路作为IRM电路的一部分，可以在也采用高中频（IF）的非常高的频率下工作。 设计的所有组件在MOS技术中是被动的和可实现的，提供显着的成本和实现优势。 此外，该装置在高于几十GHz的频率下工作。

公开(公告)号：US08189717B2

公开(公告)日：2012-05-29

申请号：US12705836

申请日：2010-02-15

申请人： Nadim Khlat ,  Conor O'Keefe ,  Patrick J. Pratt

发明人： Nadim Khlat ,  Conor O'Keefe ,  Patrick J. Pratt

IPC分类号： H03K9/00 ,  H04L27/00

CPC分类号： H03D7/166 ,  H03D3/002 ,  H03D2200/0078 ,  H03D2200/0082

摘要： A slot-based radio signal at a carrier frequency is received, the radio signal including successive frames, each frame including a set of reception time slots, to producing an input signal. A local oscillator signal is produced, In-phase and Quadrature components having a local oscillator frequency. The input signal is mixed with the local oscillator signal and Intermediate Frequency signal In-phase and Quadrature components are produced. The local oscillator frequency of the local oscillator signal changes relative to the carrier frequency of the input signal multiple times during the reception time slots of each of the frames between two frequency values. One frequency is greater and the other frequency is smaller than the carrier frequency. Frequencies of Intermediate Frequency components are selectively passed within a low Intermediate Frequency range and frequencies outside said low Intermediate Frequency range are rejected so as to produce filtered signal components.

摘要翻译： 接收载波频率的基于时隙的无线电信号，该无线电信号包括连续帧，每帧包括一组接收时隙，以产生输入信号。 产生本地振荡器信号，具有本地振荡器频率的同相和正交分量。 输入信号与本地振荡器信号混合，产生中频信号同相和正交分量。 在两个频率值之间的每个帧的接收时隙期间，本地振荡器信号的本地振荡器频率相对于输入信号的载波频率多次改变。 一个频率较大，另一个频率小于载波频率。 中频分量的频率在低中频范围内选择性地通过，并且拒绝所述低中频范围外的频率，以产生滤波信号分量。

公开(公告)号：US20110018626A1

公开(公告)日：2011-01-27

申请号：US12670111

申请日：2008-10-24

申请人： Shoji Kojima

发明人： Shoji Kojima

IPC分类号： H04L27/22 ,  G06F19/00

CPC分类号： H04L27/362 ,  H03D7/1458 ,  H03D7/1466 ,  H03D2200/0019 ,  H03D2200/0082 ,  H04L27/38

摘要： A quadrature amplitude demodulator demodulates a modulated signal on which quadrature amplitude modulation is performed. Oscillators generate an in-phase carrier signal having a rectangular wave, a trapezoidal wave or a waveform similar to these, and a quadrature carrier signal, the phase of which is shifted by ¼ cycle relative to the in-phase signal. First and second mixers respectively perform mixing of the modulated signal with the in-phase signal and the quadrature carrier signal. First and second integrators respectively integrate output signals of the first and the second mixers, for a predetermined period in accordance with the cycle of the in-phase carrier signal and the quadrature carrier signal. First and second A/D converters respectively convert outputs of the first and the second integrators into digital values.

摘要翻译： 正交幅度解调器解调在其上执行正交幅度调制的调制信号。 振荡器产生具有矩形波，梯形波或与其类似的波形的同相载波信号，相位相移相移到相位信号的1/4周期的正交载波信号。 第一和第二混频器分别执行调制信号与同相信号和正交载波信号的混合。 第一和第二积分器根据同相载波信号和正交载波信号的周期分别将第一和第二混频器的输出信号合并预定的周期。 第一和第二A / D转换器分别将第一和第二积分器的输出转换成数字值。