摘要
为了尽可能多地用软件来实现仪表着陆系统(ILS)接收机的信号处理,需要对导航信号进行数字化,而基于多相滤波的数字正交变换无需正交本振,结构上也更适用于实时处理系统。介绍了ILS的工作原理及信号体制,研究了基于多相滤波的ILS信号的数字正交变换技术,通过MATLAB仿真验证了设计的可行性。
In order to implement signals processing of Instrument Landing System （ILS） receiver by software as far as possible, it is necessary to digitalize the navigation signals. However, the digital quadrature transformation based on polyphase filters does not need quadrature LO, it is more suitable for realtime processing system in terms of structure. This paper presents the working principle of ILS and its signal system, investigates the digital quadrature transformation of ILS singals based on polyphase filters. The simulation results by MATLAB indicate that the design is feasible.
出处
《通信技术》
2009年第1期351-353,共3页
Communications Technology
关键词
仪表着陆系统(ILS)
多相滤波
数字正交变换
Instrument Landing System（ILS）
polyphase filters
digital quadrature transformation
