应答器传输单元关键解调技术研究

应答器传输单元（BTM）是车载设备的关键设备之一,用于解调地面应答器发送的应答器报文。对天线在恶劣工作环境下接收的FSK信号进行解调,FSK信号解调处理的精度和可靠性是保证BTM安全可靠运行的基础。在大量调研相关文献的基础上,给出了正交解调的解析原理,并提出了一种基于此解析原理的抗干扰的正交解调方法。仿真实验结果表明该方法具有较好的抗干扰效果。

Study of key Demodulation Technology for Balise Transmission Module

Balise transmission module,for short,BTM,is one of the key devices onboard and adopted in demodulating messages from ground balises.The precision and reliability of the demodulation methods for FSK signals are the key technologies to ensure a safe and reliable operation of balise transmission module whose antenna typically working in harsh conditions.In this paper,the resolution principle of orthogonal demodulation is presented and a kind of non-coherent demodulation method for FSK using this principle is given on the basis of massive literature surveys.The simulation results reveal that this method is of ideal anti-interference effects.