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研究Ka频段通信卫星系统信道相位噪声模拟方法与硬件实现技术。提出在中频采用多级IIR滤波器并联的形式产生幂律分布噪声,用于实现相位噪声特性模拟的方法。给出IIR滤波器组的设计方法以及相位噪声的模拟精度,并基于FPGA+DSP硬件平台实现了相位噪声模拟器,实测曲线表明其模拟范围优于Aeroflex信道模拟器。
Research on the method and hardware of channel phase noise simulation in Ka-band communication satellite system. Proposed in the intermediate frequency multi-stage IIR filter parallel power-law distribution of noise generated for the realization of phase noise characteristics of the simulation method. The design method of IIR filter bank and the simulation accuracy of phase noise are given. The phase noise simulator is implemented based on FPGA + DSP hardware platform. The measured curves show that the simulation range is better than Aeroflex channel simulator.