数字航空通信系统中DME干扰信号抑制技术研究

研究了L波段中常见的测距器(Distance Measure Equipment,DME)信号,为了抑制该信号,提高L波段数字航空通信系统1型(L-DACS1)的抗干扰性能。提出了通过对超出特定门限的接收信号乘以相应的衰减因子的方法,达到抑制干扰的目的;同时也能够提高系统的输出信噪比。最后通过仿真验证了该算法可以有效地提高L-DACS1的抗干扰性能。

Study on DME Anti-Interference Methods of Digital Aeronautical Communication System

The L-band Digital Aeronautical Communication System 1 ( L-DACS1 ) is a broadband system employing Orthogonal Frequency-Division Multiplexing (OFDM) as air multi-carrier wideband communication systems. It is one of future digital aeronautical communication system candidate which could render air traffic and operation control communication service to many planes on air simultaneously. In order to eliminate the L-band navigation signals (Distance Measure Equipment, DME) , the corresponding attenuation factor was multiplied to achieve the purpose of interference suppression,when the received signal exceed the particular threshold, but also to improve the system's output signal noise ratio. Finally, the simulation show that the algorithm can effectively improve the L the-DACS1 the anti-interference performance.