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323 条记录 (耗时 0.016 秒)

    QUADRATURE MODULATOR CARRIER QUADRATURE ERROR DETECTION METHOD AND QUADRATURE MODULATION DEVICE
    34.
    发明公开
    QUADRATURE MODULATOR CARRIER QUADRATURE ERROR DETECTION METHOD AND QUADRATURE MODULATION DEVICE 有权
    磨边调制器载体平方错误检测方法及装置正交调制

    公开(公告)号：EP1509015A4

    公开(公告)日：2010-04-28

    申请号：EP03733035

    申请日：2003-05-23

    申请人： ANRITSU CORP

    发明人： KANAZAWA NORIO

    IPC分类号： H04L27/00 ,  H04L27/36

    CPC分类号： H04L27/0014 ,  H04L27/364 ,  H04L2027/0016 ,  H04L2027/0018

    摘要： In a quadrature modulator which receives a pair of carrier signals having phases perpendicular to one another, and I and Q signals, and which outputs a modulating signal, a quadrature error based on a phase difference between the pair of carrier signals is detected. In a state that the signal levels of the I and Q signals are each made to be zero, a pair of dc voltages for causing that the modulating signal outputted from the quadrature modulator is made to be a predetermined reference level, are each added to the I and Q signals. In a state that pairs of dc voltages are each changed and sequentially added to the I and Q signals, plural combinations of pairs of dc voltages for causing that a signal level of the modulating signal is made to be the predetermined reference level, are retrieved, and the quadrature error is calculated from simultaneous equations in which respective values of the retrieved plural combinations of pairs of dc voltages, the signal level of the modulating signal, and a quadrature error of the carrier signals are variables.

    Generation of accurate phase and amplitude matched signals
    36.
    发明公开
    Generation of accurate phase and amplitude matched signals 审中-公开
    具有准确的相位和振幅平衡产生信号

    公开(公告)号：EP1764912A3

    公开(公告)日：2009-01-28

    申请号：EP06120371.7

    申请日：2006-09-08

    申请人： ROKE MANOR RESEARCH LIMITED

    发明人： Trinder, Julian Richard

    IPC分类号： H03B27/00 ,  H03D3/00 ,  H03C3/40 ,  H04L27/38 ,  H04L27/36

    CPC分类号： H03B27/00 ,  H03C3/406 ,  H03D3/009 ,  H04L27/364

    摘要： A circuit architecture for generation of amplitude and phase matched signals is described, which is primarily intended for the generation of quadrature signals, for example local oscillator signals, as required in many electronic systems. Using a single reference signal as an input, two output signals are generated at the same frequency. The relative amplitudes of these signals contain phase error information. An error signal is derived by amplitude comparison, and then fed back to a phase control element in a closed loop manner. The method proposed ensures that when the output amplitudes are equal then the output signals will be in phase quadrature. All signal processing is performed at the fundamental frequency, enabling wider bandwidth and higher frequency operation to be achieved, than could otherwise be realised using standard circuits based on frequency dividers.

    DIGITAL TRANSMITTER
    37.
    发明公开
    DIGITAL TRANSMITTER 审中-公开
    数字发送器

    公开(公告)号：EP1994705A2

    公开(公告)日：2008-11-26

    申请号：EP07752930.3

    申请日：2007-03-12

    申请人： INTERDIGITAL TECHNOLOGY CORPORATION

    发明人： HAQUE, Tanbir ,  KAZAKEVICH, Leonid

    IPC分类号： H04L27/36

    CPC分类号： H04L27/361 ,  H03F3/217 ,  H03F3/24 ,  H03F2200/331 ,  H03F2200/336 ,  H04B1/0014 ,  H04B1/0475 ,  H04B2001/0408 ,  H04L27/362 ,  H04L27/364

    摘要： In a digital Cartesian modulation transmitter, an encoder generates 1-bit logic signals from in-phase and quadrature signals. A single bit digital modulator multiplexes the 1-bit logic signals for Cartesian I/Q modulation. A digital upconverter (DUG) upconverts the multiplexed 1-bit logic signal. A digital power amplifier (DPA) generates a radio frequency (RF) signal based on the upconverted signal. In a digital polar modulation transmitter, an encoder converts a magnitude signal to a first 1-bit logic signal. A digital phase modulator modulates a carrier using a phase signal to generate a second 1-bit logic signal. A DUC upconverts the second 1-bit logic signal. A first-in first-out (FIFO) memory stores the first 1-bit logic signal. A combiner combines angle information contained in the second 1-bit logic signal with magnitude information contained in the first 1-bit logic signal stored in the FIFO memory. A DPA generates an RF signal based on the combined signal.

    METHOD AND SYSTEM FOR TRANSMITTER ENVELOPE DELAY CALIBRATION
    38.
    发明公开
    METHOD AND SYSTEM FOR TRANSMITTER ENVELOPE DELAY CALIBRATION 审中-公开
    发射机包络延迟校准的方法和系统

    公开(公告)号：EP1985009A2

    公开(公告)日：2008-10-29

    申请号：EP07705416.1

    申请日：2007-01-08

    申请人： Nokia Corporation

    发明人： MATERO, Jorma

    IPC分类号： H03C5/00 ,  H04L27/36 ,  H03F1/02 ,  H03M1/66

    CPC分类号： H04L27/361 ,  H03C5/00 ,  H03F1/0205 ,  H03F1/0261 ,  H03F3/24 ,  H03F2200/102 ,  H03F2200/336 ,  H03F2200/351 ,  H03F2200/504 ,  H04L27/364

    摘要： A test signal comprising periodic waveform, such as a triangular waveform and sawtooth waveform, is used for propagation delay matching in a transceiver front-end. The test signal is separately fed to the envelope path and the RF path. At the power amplifier stage, a phase modulator is used to obtain the envelope signal and the phase modulated RF signal for demodulation by an IQ demodulator. At the output end of the IQ demodulator, the I-signal is measured while the delay block is adjusted in order to vary the propagation delay. When the propagation delay matching is correct, the peak-to-peak value of the I-signal is a minimum. Preferably, during calibration using the test signal, the transmitter RF power amplifier is disabled so that no spurious signals will be sent. The transmitter can be an EDGE polar transmitter, a non-EDGE transmitter or a EER polar transmitter.

    摘要翻译： 包括诸如三角波形和锯齿波形之类的周期性波形的测试信号被用于收发器前端中的传播延迟匹配。 测试信号被分别馈送到包络路径和RF路径。 在功率放大器级，使用相位调制器来获得包络信号和相位调制的RF信号，以由IQ解调器进行解调。 在IQ解调器的输出端，I信号在延迟模块调整时进行测量，以改变传播延迟。 当传播延迟匹配正确时，I信号的峰峰值最小。 优选地，在使用测试信号进行校准期间，发射机RF功率放大器被禁用，使得不会发送虚假信号。 发射器可以是EDGE极坐标发射器，非EDGE发射器或EER极坐标发射器。

    Calibration method for non-ideal transceivers
    39.
    发明公开
    Calibration method for non-ideal transceivers 有权
    Verfahren zur Kalibrierung nicht idealer Sende- / Empfangsanordnungen

    公开(公告)号：EP1976213A1

    公开(公告)日：2008-10-01

    申请号：EP07108463.6

    申请日：2007-05-18

    申请人： Interuniversitair Microelektronica Centrum vzw (IMEC)

    发明人： DeBaillie, Björn

    IPC分类号： H04L27/36 ,  H04L27/38

    CPC分类号： H04L27/3863 ,  H04L27/364 ,  H04L27/368 ,  H04L2027/0016

    摘要： A method of determining non-ideality characteristics introduced on a signal by a transceiver is presented. The transceiver comprises an up-conversion transmitter and a down-conversion receiver. The method comprises the steps of: a) generating a signal comprising at least one known training symbol, b) up-converting this signal with a first frequency to a first signal in the transmitter, c) transferring the first signal from the transmitter to the receiver, d) down-converting with a second frequency this transferred first signal to a second signal in the receiver, whereby the second frequency is different from but linked to the first frequency, e) detecting at least one of the training symbols in the second signal; and f) separating, in the frequency domain, at least one of the components of at least one of the detected training symbols for determining the non-ideality characteristics.

    摘要翻译： 提出了一种通过收发器确定在信号上引入的非理想特性的方法。 收发器包括上转换发射机和下变频接收机。 该方法包括以下步骤：a）产生包括至少一个已知训练符号的信号，b）将第一频率的该信号上变频到发射机中的第一信号，c）将第一信号从发射机传送到 接收机，d）以第二频率进行下变频，这将第一信号传送到接收机中的第二信号，由此第二频率不同于但与第一频率相关联，e）检测第二频率中的至少一个训练符号 信号; 以及f）在频域中分离所检测的训练符号中的至少一个的分量中的至少一个，以确定非理想特性。