大功率多载波发射机的新设计

多载波通信系统中，发射机因为功率器件的非线性特性，会产生 多阶交调，影响发射信号频谱质量。介绍了一种大功率多载波发射机的新设计，该设计采用 运用快速初相搜索算法优化的信号产生、带AGC的上变频器和平衡式功率放大器。理论和实 践证明，该设计兼顾信号的线性度和整机效率，对交调分量、谐杂波等有较好抑制，能获得 较好的信号频谱和较高的效率。

A new design of high power multi-carrier transmitter

In a multi-carrier communication system,because of the nonlinearity of power di vices,the transmitter will produce multiple order intermodulation,and influence the quality of the transmitting signal spectrum.This paper introduces a new desi gn of high power and multi-carrier transmitter.The design uses signal generatio n optimized by Initial Phase Searching Algorithm,up converter with AGC,and balan ced power amplifier. It is proved from theoretical analysis and practice that th e design gives consideration to both linearity of signal and overall efficiency, and gets effective inhibition of the intermodulation components and harmonic wav e,and obtaines good signal spectrum and high efficiency.