基于DSP的ILS机载接收机基带信号处理

仪表着陆系统是国际目前通用的飞机着陆设备。常规的ILS机载接收机基带信号处理部分采用模拟电路实现,测量精度低,电路实现复杂。基于DSP器件,基带信号处理部分全部在数字域进行,采用了定长的FIR滤波器和多速率信号处理算法,并针对硬件条件,对软件的处理速度和存储空间进行了优化。将该软件在DSP开发板上进行了仿真,计算结果稳定、精确,总体性能优于常规ILS机载接收机基带信号处理模块。

ILS Base Band Signal Processing Based on DSP

The Instrument Landing System(ILS) is the common plane landing equipment around the world.The base band process module of the ILS airborne navigation receiver use analog circuit with low precise measurement and complex circuit.In this paper,based on DSP device,the base band signal is processed in digital domain,using fixed length FIR filters and the multi-rate signal processing algorithms.Under the condition of given hardware condition,the processing speed and memory size of software is optimized.The software is simulated on the DSP developing board,and the result show that the performance is better than common ILS base band signal processing module.