基于低时钟频率芯片生成高频率宽带信号的方法研究

Research on method of generating high⁃frequency broadband signals onlow clock frequency chip

针对高频率宽带信号生成时需要高成本的高时钟频率芯片问题,提出使用多个低时钟频率芯片通过合作方式组合生成高频率宽带信号的方法。重点解决了在低时钟芯片上处理高采样率信号的插值滤波器设计方法和DDS频率合成方法,在低时钟频率芯片上完成高采样率的基带信号和载波信号生成,并进行正交调制,从而实现了使用低时钟频率芯片生成高频率宽带信号流。

In view of the fact that the generation of high⁃frequency broadband signals requires the high clock frequency chip with high cost,a method of combining multiple low clock frequency chips to generate high⁃frequency broadband signals by cooperation is proposed,which figures out the interpolation filter design method and DDS(direct digital frequency synthesis)frequency synthesis method for processing signals with high sampling rate on the low clock chips,and generates the baseband signals and carrier signals with high sampling rate on the low clock frequency chips.In addition,the orthogonal modulation of the signals is carried out.Thus,the signal stream with high⁃frequency broadband is generated with the low clock frequency chips.