摘要
随着移动通信中线性调制方式的出现 ,功率放大器的线性化已成为一个重要的研究课题。通常采用预失真线性化技术来提高功率放大器的线性度、减小带外发射。用复频谱卷积方法对移动发射机中功率放大器进行线性化的自适应预失真器进行了研究 ,理论分析和仿真结果表明 ,可用一种不需要任何附加本机振荡器或相位参考的复卷积方法测量带外功率并利用该量对预失真器系数进行最佳调整 ,从而使带外功率达到最小。
Linearization of power amplifiers has become an important issue, with the advent of linear modulation methods in mobile communication. The predistortion is the most commonly used technique for linearizing an amplifier in order to improve the linearity degree of amplifiers and reduce the out - of - band emission of the transmitter. An adaptive predistorter for linearizing a power amplifier in a mobile transmitter is studied utilizing a complex spectral convolution. Analytical and simulation results show that a complex convolution method which requires no additional local oscillator or phase reference can be used to measure the out - of - band power and utilized the scalar quantity to update the predistorter's coefficients, in order to minimize the out - of - band power.
出处
《国防科技大学学报》
EI
CAS
CSCD
北大核心
2001年第3期44-51,共8页
Journal of National University of Defense Technology
基金
国家部委项目基金资助
