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    • 3. 发明授权
    • Method and system having capacity-dependent baseband gain and coverage-capacity swapping in a multi-carrier base station transmitters
    • 在多载波基站发射机中具有容量相关基带增益和覆盖容量交换的方法和系统
    • US07194022B2
    • 2007-03-20
    • US10163606
    • 2002-06-07
    • Mauri HonkanenAndre DekkerStephen Wasko
    • Mauri HonkanenAndre DekkerStephen Wasko
    • H04L25/00
    • H04W52/343H04L27/28H04W52/346H04W52/42
    • The invention is a method and transmission system which transmits an analog composite signal, including carriers which are respectively modulated with different digital data signal. A transmission system in accordance with the invention includes a signal combiner (18), responsive to the digital data signals, which are provided as inputs to the signal combiner, the signal combiner providing an output of a combined digital signal representing combining of the digital data signals; a multiple carrier transmitter (38) which transmits the analog composite signal; a digital to analog converter (20) which converts a composite digital signal input into the analog composite signal, the digital to analog converter having a dynamic range of digital to analog conversion; and a digital scaler (102), responsive to the combined digital signal provided by the signal combiner, which outputs the composite digital signal that is digital to analog converted by the digital to analog converter, the composite digital signal being a function of the combined digital signal provided by the signal combiner and having a controlled magnitude which results in as much of the dynamic range of the digital to analog converter as possible being used during digital to analog conversion of the composite digital signal without clipping the composite digital signal.
    • 本发明是传输模拟复合信号的方法和传输系统,包括分别用不同数字数据信号调制的载波。 根据本发明的传输系统包括响应于数字数据信号的信号组合器(18),其被提供作为信号组合器的输入,信号组合器提供表示数字数据的组合的组合数字信号的输出 信号; 发送模拟复合信号的多载波发射机(38); 数模转换器(20),其将复合数字信号输入转换为模拟复合信号,所述数模转换器具有数模转换的动态范围; 以及数字缩放器(102),响应于由信号组合器提供的组合数字信号,其输出由数模转换为模拟转换器的数字复合数字信号,复合数字信号是组合数字信号 信号由信号组合器提供并且具有受控的幅度,其导致在复合数字信号的数模转换期间尽可能多地使用数模转换器的动态范围,而不会削减复合数字信号。