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    • 77. 发明申请
    • ARCHITECTURE OF NONLINEAR RF FILTER-BASED TRANSMITTER
    • 非线性射频滤波器发射机的结构
    • WO2013093859A1
    • 2013-06-27
    • PCT/IB2012/057566
    • 2012-12-20
    • TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    • JIAN, ChunyunBAI, ChunlongSICH, Edward
    • H03F1/32H03F3/24
    • H03F1/3247H03F3/24H03F2200/171H03F2200/207H03F2203/21157H03H11/04H04L27/368
    • Systems and methods for compensating for a non-linear characteristic of a non-linear filter (30) in a transmit chain of a transmitter (28) using predistortion are disclosed. In one embodiment, a transmitter includes a power amplifier (36) configured to amplify a radio frequency input signal to provide an amplified radio frequency signal, a non-linear filter (30) configured to filter the amplified radio frequency signal to provide an output signal of the transmitter, and a predistorter (64) configured effect predistortion of the amplified radio frequency signal, where the predistortion compensates for a non-linear characteristic of the non-linear filter (30). In this manner, the output signal is as if the non-linear filter were a linear, or substantially liner, filter. The predistortion applied by the predistorter may be fixed or adaptive.
    • 公开了一种使用预失真来补偿发射机(28)的发射链中的非线性滤波器(30)的非线性特性的系统和方法。 在一个实施例中,发射机包括被配置为放大射频输入信号以提供放大射频信号的功率放大器(36),非线性滤波器(30)被配置为对放大的射频信号进行滤波以提供输出信号 和预失真补偿非线性滤波器(30)的非线性特性的预失真(64)配置的放大射频信号的效果预失真。 以这种方式,输出信号就好像非线性滤波器是线性或基本上是线性的滤波器。 预失真器应用的预失真可以是固定的或适应性的。
    • 80. 发明申请
    • POWER DETECTION OF INDIVIDUAL CARRIERS OF A MULTIPLE-CARRIER WIDEBAND SIGNAL
    • 多载波宽带信号的单载波的功率检测
    • WO2013062720A1
    • 2013-05-02
    • PCT/US2012/058223
    • 2012-10-01
    • GENERAL INSTRUMENT CORPORATIONMATTSSON, Anders S.ROGERS, Sean R.
    • MATTSSON, Anders S.ROGERS, Sean R.
    • H04W52/34H04L27/36H04L27/26
    • H04L27/368H04L27/2626H04W52/346
    • An apparatus and method measures power of channels generated by a multiple-carrier transmitter that upconverts a plurality of baseband signals to a corresponding plurality of assigned carrier frequencies to generate an RF wideband signal. A measurement module's input interface receives a selected baseband signal and a corresponding assigned carrier frequency as well as the RF wideband signal. An undersampling component undersamples the RF wideband signal for a sampling interval to generate a plurality of measured aliased samples. A determination component determines a plurality of determined aliased samples based on the selected baseband signal upconverted to the corresponding assigned carrier frequency. A correlator correlates the plurality of measured aliased samples with the plurality of determined aliased samples to produce a correlation result. A transmit power component determines a transmitted power of the correlation result for a selected channel of the RF wideband signal corresponding to the selected baseband signal as upconverted.
    • 一种装置和方法测量由多载波发射机产生的信道的功率,该多载波发射机将多个基带信号上变频到相应的多个分配的载频,以产生RF宽带信号。 测量模块的输入接口接收所选择的基带信号和对应的分配的载波频率以及RF宽带信号。 欠采样组件对采样间隔的RF宽带信号进行下采样以产生多个测量的混叠样本。 确定组件基于上变频到相应的分配的载波频率的所选择的基带信号来确定多个确定的混叠样本。 相关器将多个经测量的混叠样本与多个确定的混叠样本相关联以产生相关结果。 发射功率分量确定与被选择的基带信号相对应的RF宽带信号的选定信道的相关结果的发射功率作为上转换。