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    • 31. 发明授权
    • Apparatus for measuring in-phase and quadrature (IQ) imbalance
    • 用于测量同相和正交(IQ)不平衡的装置
    • US07995645B2
    • 2011-08-09
    • US12027762
    • 2008-02-07
    • Kyeongho LeeJoonbae ParkJeong Woo LeeSeung-Wook LeeEal Wan Lee
    • Kyeongho LeeJoonbae ParkJeong Woo LeeSeung-Wook LeeEal Wan Lee
    • H04B3/46
    • H03D7/166H03D3/009H04L25/061H04L27/364H04L27/3863H04L2027/0016
    • The present general inventive concept relates to apparatuses and/or methods for measuring an in-phase and quadrature (IQ) imbalance. In one embodiment, a signal generator can provide a first IQ signal of a DC component during a first period and the first IQ signal of a first angular frequency during a second period, an IQ up-conversion mixer can up-convert the first IQ signal by a second angular frequency during the first period and up-convert the first IQ signal by a third angular frequency during the second period to output a second IQ signal, an IQ down-conversion mixer can down-convert the second IQ signal by the third angular frequency to output a third IQ signal and an IQ imbalance detector can obtain a first IQ imbalance (e.g., Rx IQ imbalance) from the third IQ signal during the first period and a second IQ imbalance (e.g., Tx/Rx IQ imbalance) during the second period.
    • 本总体发明构思涉及用于测量同相和正交(IQ)不平衡的装置和/或方法。 在一个实施例中,信号发生器可以在第一周期期间提供DC分量的第一IQ信号,并且在第二周期期间提供第一角频率的第一IQ信号,IQ上变频混频器可以上变频第一IQ信号 在第一周期期间以第二角度频率进行第二角度频率,并且在第二周期期间将第一IQ信号上升转换第三角度频率以输出第二IQ信号,IQ降频转换混频器可以将第二IQ信号下变频第三IQ信号 输出第三IQ信号和IQ不平衡检测器的角频率可以在第一周期期间从第三IQ信号和第二IQ不平衡(例如,Tx / Rx IQ不平衡)获得第一IQ不平衡(例如,Rx IQ不平衡) 第二期。
    • 32. 发明授权
    • Receiver with fast gain control and digital signal processing unit with transient signal compensation
    • 具有快速增益控制的接收器和具有瞬态信号补偿的数字信号处理单元
    • US07953192B2
    • 2011-05-31
    • US11907960
    • 2007-10-18
    • Suk Kyun HongJae Ho RyuSung Woo Ryu
    • Suk Kyun HongJae Ho RyuSung Woo Ryu
    • H04L27/08
    • H03G3/3068
    • Embodiments of the present general inventive concept relate to a transient signal compensator for apparatuses such as a transceiver or receiver used in a wire/wireless communication and/or a digital signal processor that may be used in the receiver and methods thereof. In one embodiment, a receiver can include an amplifier to amplify a received signal, a digital filter to filter a digital signal corresponding to an output signal of the amplifier, where the digital filter is configured to replace a corresponding value (e.g., stored in a memory) for the digital filter with a gain compensated value during a predetermined delay time after a gain of the amplifier is changed (e.g., from a first gain g1 to a different second gain g2). The gain compensated value to compensate for a transient signal (e.g., related to the change from the first gain g1 to the second gain g2).
    • 本发明总体构思的实施例涉及用于诸如在有线/无线通信中使用的收发器或接收器的装置的瞬时信号补偿器和/或可用于接收器的数字信号处理器及其方法。 在一个实施例中,接收机可以包括用于放大接收信号的放大器,数字滤波器以对与放大器的输出信号相对应的数字信号进行滤波,其中数字滤波器被配置为替换对应的值(例如,存储在 存储器),用于在放大器的增益改变(例如,从第一增益g1到不同的第二增益g2)之后的预定延迟时间期间具有增益补偿值的数字滤波器。 增益补偿值以补偿瞬态信号(例如,与从第一增益g1到第二增益g2的变化相关)。
    • 36. 发明申请
    • Bidirectional turbo ISI canceller-based DSSS receiver for high-speed wireless LAN
    • 用于高速无线LAN的基于双向turbo ISI消除器的DSSS接收机
    • US20040131109A1
    • 2004-07-08
    • US10690629
    • 2003-10-23
    • GCT Semiconductor, Inc.
    • Byoung-Hoon KimSuwon KangBong Youl ChoKyeongho Lee
    • H04B001/707
    • H04B1/7097H04B1/7115H04L25/03171
    • A bidirectional turbo ISI canceller cancels precursor-ISI as well as postcursor-ISI in a received signal without incorporating a multiplicative feedforward equalization filter. This is accomplished by taking a three-step receiver design approach. In the first step, an optimal single-symbol RAKE receiver is designed to comprise a CMF, a codeword correlator bank, and an energy bias (EB) canceller under the assumption that no ISI is generated by preceding or trailing symbols. In a second step, a DFE is included for suppressing postcursor-ISI caused by a preceding symbol. Finally, a precursor ISI canceler is used to remove the remaining ISI caused by a trailing symbol. All three components may be integrated into a BTIC-based receiver applying turbo-iteration processing.
    • 双向turbo ISI消除器在接收信号中取消前体ISI以及后端ISI,而不需要并入前置均衡滤波器。 这是通过采取三步接收机设计方法来实现的。 在第一步中,假定不存在由先前或后面符号产生的ISI,最佳单符号RAKE接收机被设计为包括CMF,码字相关器组和能量偏置(EB)消除器。 在第二步骤中,包括用于抑制由先前符号引起的后期ISI的DFE。 最后,使用前驱体ISI消除器去除由尾随符号引起的剩余ISI。 所有三个组件可以被集成到应用turbo迭代处理的基于BTIC的接收机中。
    • 38. 发明申请
    • Mixer structure and method for using same
    • 搅拌机结构及使用方法
    • US20020030529A1
    • 2002-03-14
    • US09985897
    • 2001-11-06
    • GCT Semiconductor, Inc.
    • Kyeongho LeeDeog-Kyoon Jeong
    • G06G007/16
    • H04B1/40H03D7/1441H03F2200/372H03H11/22H03H2011/0494H03K9/00H03L7/0891H03L7/0995H03L7/1974H04B1/28H04B1/403
    • A mixer structure and method for using same in accordance with the present invention includes a multi-phase mixer. A VCO includes a plurality of differential delay cells to output a plurality of multi-phase clock signals. The multi-phase mixer can include a load circuit, switch circuit, noise reduction circuit and an input circuit. The switch circuit is coupled to receive the plurality of multi-phase clock signals and includes a first switch array and a second switch array coupled to the load circuit, respectively. The noise reduction circuit coupled to the switch circuit can include a transistor responsive to a bias voltage. The input circuit includes a transistor receiving the input signal. The first switch array includes a first plurality of switches coupled between a first output terminal and a second node, and the second switch array includes a second plurality of switches coupled between a second output terminal and the second node. Preferably, each of the plurality of switches includes two pairs of serially connected transistors, wherein the serially connected transistors are coupled in parallel to provide a symmetric electrical connection for each of two input ports. The mixer and method for using same can be single or double-balanced mixers receiving an RF input signal.
    • 根据本发明的混合器结构及其使用方法包括多相混合器。 VCO包括多个差分延迟单元,以输出多个多相时钟信号。 多相混频器可以包括负载电路,开关电路,降噪电路和输入电路。 开关电路被耦合以接收多个多相时钟信号,并且包括分别耦合到负载电路的第一开关阵列和第二开关阵列。 耦合到开关电路的降噪电路可以包括响应偏置电压的晶体管。 输入电路包括接收输入信号的晶体管。 第一开关阵列包括耦合在第一输出端子和第二节点之间的第一多个开关,并且第二开关阵列包括耦合在第二输出端子和第二节点之间的第二多个开关。 优选地,多个开关中的每一个包括两对串联连接的晶体管,其中串联连接的晶体管并联耦合以为两个输入端口中的每一个提供对称电连接。 混频器和使用它的方法可以是接收RF输入信号的单或双平衡混频器。