基于Simulink的数字下变频系统的设计与仿真

详细信息

Design and simulation of digital down conversion system based on Simulink

School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou 221008, China

摘要: 针对数字下变频中低通抽取滤波器通带失真大、资源消耗严重等问题，采用锐化技术和二阶多项式插值补偿滤波器设计了基于Simulink的数字下变频系统，并利用Simulink构建系统模型。仿真结果表明，该系统不仅可以达到降低信号频率和速率的目的，同时可以有效改善抽取滤波器的通带与阻带特性，并减少了系统工作量。
- 数字下变频 /
- 锐化技术 /
- ISOP滤波器 /
- 直接数字频率合成器 /
- 高速率抽取滤波 /
- Simulink
Abstract: In view of problem that low-pass decimation filter has big passband distortion and serious resource consumption in existing digital down conversion system, a digital down conversion system based on Simulink was designed adopting sharpening technique and interpolated second-order polynomial interpolation compensation filter, and system model was built by Simulink. The simulation results show that the system not only can reduce frequency and rate of signal, but also can effectively improve characteristics of decimation filter passband and stopband, and reduce workload of the system.
- digital down conversion /
- sharpening technique /
- ISOP filter /
- direct digital synthesizer /
- high-rate decimation filter /
- Simulink