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US07812748B2 Apparatus for monitoring non-linear distortions of radio signals and a method therefor 有权
用于监测无线电信号的非线性失真的装置及其方法

Apparatus for monitoring non-linear distortions of radio signals and a method therefor
Abstract:
A transmitter (200) for transmitting radio signals comprising a digital signal source (102), a compensation unit (104), two digit al-to-analogue converters (106) and (108), an analogue modulator (110), an amplifier (112) an antenna (114) connected to the amplifier (112), the transmitter further comprises a front-end unit (220) connected to an estimator (230). Said front-end unit (220) comprises a mixer operably (302) connected to a local oscillator (304), an analogue-to-digital converter (306) for processing signal received from the mixer (302), a first digital filter (308) for converting signal received from the analogue-to-digital converter (306) to a baseband signal, an adaptive digital filter (310) operable to time-synchronise its output signal (z(k)) to a reference signal (r(k)) and to remove linear distortions from the signal received from the first digital filter.
Abstract(Chinese):

一种用于发送包括数字信号源（102），补偿单元（104），两个数模转换器（106）和（108）的无线电信号的发射机（200），模拟调制器（110），放大器 112）连接到放大器（112）的天线（114），所述发射机还包括连接到估计器（230）的前端单元（220）。 所述前端单元（220）包括连接到本地振荡器（304）的可操作地（302）的混合器，用于处理从混频器（302）接收的信号的模拟 - 数字转换器（306），第一数字滤波器 308），用于将从模拟 - 数字转换器（306）接收的信号转换为基带信号;自适应数字滤波器（310），其可操作以将其输出信号（z（k））时间同步到参考信号（r k））并且从从第一数字滤波器接收的信号中去除线性失真。

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