会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明申请
    • COMPENSATION OF A TRANSMITTER DISTORTION
    • 发射机失真的补偿
    • WO2012126845A1
    • 2012-09-27
    • PCT/EP2012/054692
    • 2012-03-16
    • ST-ERICSSON SAEPIFANO, Fabio
    • EPIFANO, Fabio
    • H04B1/30H04B1/04H04L27/36H04L27/38
    • H03F1/3247H04B1/0475H04B1/30H04L27/0002H04L27/364H04L2027/0016
    • There is described a method for compensating the phase and gain distortions of a transmitter analog front end affected by a leakage of a local oscillator. The method comprises generating a single complex tone signal in a digital front end, wherein the generation comprises compensating the signal gain and phase with gain and phase offsets. The method comprises feeding the compensated signal into the transmitter analog front end. The method comprises feeding a corresponding output signal of the transmitter analog front end into a nonlinear component, thereby generating an inter-modulation between the complex tone signal and at least one tone signal due to the local oscillator leakage. The method comprises feeding the output of the nonlinear component into a measurement receiver analog front end. The method comprises filtering the output of the measurement receiver analog front end with a band pass filter in order to isolate the inter-modulation, which is indicative of the distortions introduced by the transmitter analog front end. The method comprises measuring the power of the filtered signal. The method comprises updating the gain and phase offsets according to the measured power, by reducing said measured power. The disclosure also relates, in particular, to a digital front end, to an analog system, to a telecommunication device, to a computer program, and to a storage medium.
    • 描述了一种用于补偿受本地振荡器泄漏影响的发射机模拟前端的相位和增益失真的方法。 该方法包括在数字前端生成单个复音信号,其中生成包括利用增益和相位偏移补偿信号增益和相位。 该方法包括将经补偿的信号馈送到发射器模拟前端。 该方法包括将发射机模拟前端的相应输出信号馈入非线性分量,从而由于局部振荡器泄漏而产生复音调信号与至少一个音调信号之间的互调。 该方法包括将非线性分量的输出馈送到测量接收机模拟前端。 该方法包括用带通滤波器对测量接收机模拟前端的输出进行滤波,以隔离互调,这表示由发射机模拟前端引入的失真。 该方法包括测量滤波信号的功率。 该方法包括通过减少所测量的功率来根据测量的功率更新增益和相位偏移。 本公开还特别涉及数字前端,模拟系统,电信设备,计算机程序和存储介质。
    • 9. 发明申请
    • 受信装置、イメージ信号の減衰方法及びミスマッチ補償方法
    • 接收装置,图像信号衰减方法和误差补偿方法
    • WO2010073720A1
    • 2010-07-01
    • PCT/JP2009/007301
    • 2009-12-25
    • 日本電気株式会社狐塚正樹
    • 狐塚正樹
    • H04B1/26H03D7/18H04L27/38
    • H03D7/18H03D2200/0088H04B1/28H04L27/3863H04L2027/0016
    •  高周波信号源を必要とすることなく、小面積で、不所望成分信号の除去度の向上 を図る。IF帯模擬イメージ信号生成部(12)から出力されるIF帯模擬イメージ信号IM-I、IM-Qを経路切り替え器(13)を介して直交ミキサ(14)に入力する。直交ミキサ(14)からフィードスルーして出力されるIM-I、IM-Qを複素フィルタ(16)から出力し、そのIM-I、IM-Qの振幅を振幅検出部(17)で検出する。検出された振幅に基づいて素子値制御部(18)が、上記振幅が小さくなるように複素フィルタ(16)の構成素子の素子値を制御する。
    • 可以使用小面积来改善不需要的分量信号的去除程度,而不需要使用任何高频信号源。 由IF频带模拟图像信号生成单元(12)输出的IF频带模拟图像信号(IM-I,IM-Q)经由路径开关(13)输入到正交混频器(14)。 信号(IM-I,IM-Q)然后由正交混频器(14)通过馈通输出到复数滤波器(16),然后由复数滤波器(16)输出到幅度确定单元 ),其确定信号的幅度(IM-1,IM-Q)。 然后,元件值控制单元(18)基于所确定的幅度,以使振幅变小的方式控制复数滤波器(16)的构成元件的元件值。
    • 10. 发明申请
    • I/Q CALIBRATION OF TRANSMIT AND RECEIVE PATHS IN OFDM FDD COMMUNICATION SYSTEMS
    • OFDM FDD通信系统中的发送和接收码的I / Q校准
    • WO2010014805A1
    • 2010-02-04
    • PCT/US2009/052247
    • 2009-07-30
    • QUALCOMM INCORPORATEDKOHLMANN, Michael
    • KOHLMANN, Michael
    • H04L27/26H04L27/36H04L27/38H04L27/00
    • H04L27/368H04L27/2627H04L27/2649H04L27/3863H04L2027/0016H04L2027/0018H04L2027/0024
    • I/Q gain and phase mismatches of both transmit and receive paths of an OFDM FDD transceiver are simultaneously estimated. An up-converted RF signal is generated when the transmit path performs IQ modulation on a reference signal having a single sideband tone. The up-converted RF signal is sent via a loop-back path to the receive path. A down-converted evaluation signal is generated when the receive path performs IQ demodulation on the up-converted RF signal. The single evaluation signal is used to determine the transmit path gain and phase mismatches and the receive path gain and phase mismatches. The four I/Q mismatches are estimated without using significant hardware not otherwise used in the regular transmission of data signals. The I/Q mismatches in data signals are corrected by pre-processing the up-converted RF signals and post-processing the down-converted RF signals by adding attenuated components of the in-phase and quadrature-phase signals to each other.
    • 同时估计OFDM FDD收发器的发送和接收路径的I / Q增益和相位失配。 当发送路径对具有单个边带色调的参考信号执行IQ调制时,产生上变频的RF信号。 经上变频的RF信号通过环回路径发送到接收路径。 当接收路径对上转换的RF信号执行IQ解调时,产生下变频的评估信号。 单个评估信号用于确定发射路径增益和相位不匹配以及接收路径增益和相位不匹配。 在不使用数据信号的常规传输中没有使用的重要硬件的情况下,估计四个I / Q不匹配。 数据信号中的I / Q不匹配通过预处理上转换的RF信号并且通过将同相和正交相位信号的衰减分量相加来对下变频的RF信号进行后处理来校正。