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    Adaptive/configurable intermediate frequency (IF) wireless receiver and bluetooth device using the same
    2.
    发明授权
    Adaptive/configurable intermediate frequency (IF) wireless receiver and bluetooth device using the same 有权

    公开(公告)号：US09954560B2

    公开(公告)日：2018-04-24

    申请号：US14519643

    申请日：2014-10-21

    申请人： Wuxi Vimicro Corporation

    发明人： Bo Xia ,  Yue Wu ,  David Xiaodong Yang ,  Bin Xu ,  Li Kang

    IPC分类号： H04B1/00 ,  H04B1/18 ,  H04L7/033

    CPC分类号： H04B1/0017 ,  H04B1/18 ,  H04L7/033 ,  H04W4/80

    摘要： Techniques pertaining to an adaptive/configurable IF wireless receiver are disclosed. Such an adaptive/configurable IF wireless receiver can be used in a Bluetooth device. According to one embodiment of the present invention, a wireless receiver is designed to include a low noise amplifier configured to amplify an input RF signal; an adjustable local RF synthesizer configured to provide a local RF clock signal with variable frequency; a RF mixer configured to down convert the amplified RF signal to an analog IF signal by mixing the local RF clock signal with the amplified RF signal; a filter configured to filter the analog IF signal; an analog to digital converter configured to convert the filtered analog IF signal to a digital IF signal; an adjustable digital local IF synthesizer configured to provide a digital local IF clock signal with variable frequency; a digital mixer configured to down convert the digital IF signal to a baseband signal by mixing the digital local IF clock signal with the digital IF signal; and an IF configuration unit provided to configure the adjustable local RF synthesizer to vary the frequency of the local RF clock signal, and configure the adjustable digital local IF synthesizer to vary the frequency of the digital local IF clock signal.

    METHOD FOR DEMODULATION AND DEMODULATOR
    4.
    发明申请
    METHOD FOR DEMODULATION AND DEMODULATOR 有权
    解调和解调器的方法

    公开(公告)号：US20170078134A1

    公开(公告)日：2017-03-16

    申请号：US15361766

    申请日：2016-11-28

    申请人： TECHNISCHE UNIVERSITAET MUENCHEN

    发明人： Josef A. NOSSEK ,  Manuel STEIN ,  Sebastian THEILER

    IPC分类号： H04L27/38 ,  H04B17/20 ,  H04B1/00 ,  H04B1/06

    CPC分类号： H04L27/38 ,  H04B1/0017 ,  H04B1/06 ,  H04B17/20

    摘要： A method is provided for demodulation of an analog receive signal carrying information, wherein a number of more than two analog signals is formed from the receive signal in separate channels such that the receive signal is multiplied in each case by a period function, the phase thereof respectively differing in the channels, and wherein the multiple signals are each low-pass filtered.

    摘要翻译： 提供了一种用于解调携带信息的模拟接收信号的方法，其中在单独信道中从接收信号形成多于两个的模拟信号的数量，使得接收信号在每种情况下被乘以周期函数，其相位 分别在通道中不同，并且其中多个信号各自被低通滤波。

    WIDE BANDWIDTH DIGITAL PREDISTORTION SYSTEM WITH REDUCED SAMPLING RATE
    6.
    发明申请
    WIDE BANDWIDTH DIGITAL PREDISTORTION SYSTEM WITH REDUCED SAMPLING RATE 有权
    宽带数字数字预测系统，具有降低的采样率

    公开(公告)号：US20150180519A1

    公开(公告)日：2015-06-25

    申请号：US14552231

    申请日：2014-11-24

    申请人： Dali Systems Co. Ltd.

    发明人： Wan-Jong Kim ,  Shawn Patrick Stapleton

    IPC分类号： H04B1/04 ,  H04B1/00

    CPC分类号： H04B1/0475 ,  H03F1/02 ,  H03F1/3241 ,  H03F3/24 ,  H04B1/0017 ,  H04B2001/0425 ,  H04B2001/0433 ,  H04B2001/045

    摘要： A digital predistortion linearization method is provided for increasing the instantaneous or operational bandwidth for RF power amplifiers employed in wideband communication systems. Embodiments of the present invention provide a method of increasing DPD linearization bandwidth using a feedback filter integrated into existing digital platforms for multi-channel wideband wireless transmitters. An embodiment of the present invention utilizes a DPD feedback signal in conjunction with a low power band-pass filter in the DPD feedback path.

    摘要翻译： 提供数字预失真线性化方法来增加在宽带通信系统中使用的RF功率放大器的瞬时或者操作带宽。 本发明的实施例提供了一种使用集成到用于多信道宽带无线发射机的现有数字平台中的反馈滤波器来增加DPD线性化带宽的方法。 本发明的一个实施例利用DPD反馈信号与DPD反馈路径中的低功率带通滤波器相结合。

    Wideband multi-channel receiver with fixed-frequency notch filter for interference rejection
    7.
    发明授权
    Wideband multi-channel receiver with fixed-frequency notch filter for interference rejection 有权
    具有固定频率陷波滤波器的宽带多通道接收机，用于干扰抑制

    公开(公告)号：US09042502B2

    公开(公告)日：2015-05-26

    申请号：US14206826

    申请日：2014-03-12

    申请人： Honeywell International Inc.

    发明人： Alfonso Malaga ,  Timothy P. Gibson ,  Jeffrey K. Hunter ,  Gregory Triplett

    IPC分类号： H04L27/00 ,  H04L25/08 ,  H04B1/00 ,  H04B1/10

    CPC分类号： H04L25/08 ,  H04B1/0007 ,  H04B1/0014 ,  H04B1/0017 ,  H04B1/0021 ,  H04B1/1036

    摘要： A wideband multi-channel receiver comprises an antenna configured to receive a radio frequency band. A band-pass filter is in signal communication with the antenna, and a low-noise amplifier is in signal communication with the band-pass filter. A mixer is in signal communication with the low-noise amplifier and is configured to translate a radio frequency band to an intermediate frequency (IF) band. A tunable local oscillator is in signal communication with the mixer. At least one fixed-frequency notch filter is in signal communication with the mixer, with the notch filter configured to reject at least one interference signal in the IF band while passing remaining signals in the IF band. An analog-to-digital converter is in signal communication with the notch filter and is configured to convert the remaining signals in the IF band to digital signals.

    摘要翻译： 宽带多频道接收机包括被配置为接收射频频带的天线。 带通滤波器与天线进行信号通信，低噪声放大器与带通滤波器进行信号通信。 混频器与低噪声放大器进行信号通信，并被配置为将无线电频带转换为中频（IF）频带。 可调谐的本地振荡器与混频器进行信号通信。 至少一个固定频率陷波滤波器与混频器进行信号通信，其中陷波滤波器被配置为在IF频带中通过剩余信号的同时拒绝IF频带中的至少一个干扰信号。 模数转换器与陷波滤波器进行信号通信，并被配置为将IF频带中的剩余信号转换为数字信号。

    DIGITAL FRONT END RECEIVER USING DC OFFSET COMPENSATION SCHEME
    8.
    发明申请
    DIGITAL FRONT END RECEIVER USING DC OFFSET COMPENSATION SCHEME 有权
    数字前端接收器使用直流偏移补偿方案

    公开(公告)号：US20130163699A1

    公开(公告)日：2013-06-27

    申请号：US13609704

    申请日：2012-09-11

    申请人： Sang-Kyun Kim ,  Ik Soo Eo ,  Hyun Kyu Yu

    发明人： Sang-Kyun Kim ,  Ik Soo Eo ,  Hyun Kyu Yu

    IPC分类号： H04B1/16

    CPC分类号： H04B1/0017 ,  H04B1/0021

    摘要： The present invention relates to a digital front end receiver using a DC offset compensation scheme. The digital front end receiver includes a DC offset compensation filter configured to remove DC offset components from signals received from a digital mixer and a Cascaded Integrator-Comb (CIC) decimation filter configured to reduce a sampling rate of the signals received from the DC offset compensation block.

    摘要翻译： 本发明涉及使用DC偏移补偿方案的数字前端接收机。 数字前端接收器包括DC偏移补偿滤波器，其被配置为从数字混频器接收的信号中去除DC偏移分量，并且Cascaded Integrator-Comb（CIC）抽取滤波器被配置为降低从DC偏移补偿接收到的信号的采样率 块。

    Direct RF digital transceiver and method
    9.
    发明授权
    Direct RF digital transceiver and method 有权
    直接RF数字收发器和方法

    公开(公告)号：US08213876B2

    公开(公告)日：2012-07-03

    申请号：US11833068

    申请日：2007-08-02

    申请人： Pathamadai V. Sankar ,  John J. Hanrahan ,  Snehal R. Patel ,  Mahesh C. Reddy ,  Ronald A. Webb

    发明人： Pathamadai V. Sankar ,  John J. Hanrahan ,  Snehal R. Patel ,  Mahesh C. Reddy ,  Ronald A. Webb

    IPC分类号： H04B1/38

    CPC分类号： H04B1/0017

    摘要： A direct digital radio having a high speed RF front end in communication with an antenna, and a radio subsystem that can be configured to form a multi-channel, full duplex transceiver system. The high speed RF front end provides a digital signal to the radio subsystem. Each transceiver includes a waveform processing subsystem that makes use of a linear, phase-B cubic spline interpolating finite impulse response (IFIR) filter for filtering the received RF signal substantially entirely in the digital domain. The linear phase-B, cubic spline IFIR filter requires significantly fewer hardware components than traditional FIR filters and is ideally suited for implementation using Very Large Scale Integration (VLSI) technology.

    摘要翻译： 具有与天线通信的高速RF前端的直接数字无线电装置以及可被配置为形成多信道全双工收发器系统的无线电子系统。 高速RF前端向无线电子系统提供数字信号。 每个收发器包括波形处理子系统，其使用线性的B相三次样条内插有限脉冲响应（IFIR）滤波器，用于基本上完全在数字域中对接收的RF信号进行滤波。 线性相位B，三次样条IFIR滤波器需要比传统FIR滤波器少得多的硬件组件，非常适合使用超大规模集成（VLSI）技术实现。

    Hybrid heterodyne transmitters and receivers
    10.
    发明授权
    Hybrid heterodyne transmitters and receivers 有权
    混合外差发射机和接收机

    公开(公告)号：US07860189B2

    公开(公告)日：2010-12-28

    申请号：US11208430

    申请日：2005-08-19

    申请人： Eugene M. Petilli ,  Brian Jadus ,  Clyde Washburn ,  John M. Alvermann

    发明人： Eugene M. Petilli ,  Brian Jadus ,  Clyde Washburn ,  John M. Alvermann

    IPC分类号： H03K9/00

    CPC分类号： H04B1/28 ,  H03M3/364 ,  H03M3/40 ,  H03M3/41 ,  H03M3/438 ,  H03M3/496 ,  H04B1/001 ,  H04B1/0017 ,  H04B1/0025

    摘要： Disclosed are hybrid heterodyne transmitters and receivers for use in communications systems, or other systems, and the corresponding methods for hybrid heterodyne transmitting and receiving. A heterodyne receiver for converting a continuous time modulated signal to a discrete time digital baseband signal includes a sigma-delta modulator. The sigma-delta modulator is a sigma-delta analog-to-digital converter constructed and arranged to receive a modulated signal at an RF carrier frequency and provide a quantized output at a first intermediate frequency. The heterodyne receiver may also include a digital mixer constructed and arranged to receive a data stream quantized by the sigma-delta analog-to-digital converter and receive a signal at a second mixing frequency. The digital mixer then provides digital signals representative of a baseband signal suitable for digital signal processing.

    摘要翻译： 公开了用于通信系统或其他系统的混合外差发射机和接收机以及用于混合外差发射和接收的相应方法。 用于将连续时间调制信号转换为离散时间数字基带信号的外差接收器包括Σ-Δ调制器。 Σ-Δ调制器是构造和布置为以RF载波频率接收调制信号并在第一中频提供量化输出的Σ-Δ模拟 - 数字转换器。 外差接收机还可以包括构造和布置成接收由Σ-Δ模数转换器量化并以第二混频器接收信号的数据流的数字混频器。 然后，数字混合器提供表示适合于数字信号处理的基带信号的数字信号。