摘要
UM71系列(包括ZPW-2000A)无绝缘轨道电路已成为我国铁路的主流制式,其调制方式均为FSK(移频键控),频率选择基本一致。轨道电路接收器、机车信号和智能检测仪表的分析软件中已广泛采用数字滤波和FFT算法,本文提出的ZFFT算法可在满足实时性要求的情况下提高频谱分辨率。
UM71 series jointless track circuits, including ZPW-2000A, have become the dominating technique for Chinese railway, featuring Frequency Shift Keying modulating pattern with basically similar frequency selection. Digital filter and FFT algorithms have been widely used in railway circuit receiver, cab signal, and analysis software for intelligent testing instrument. This paper introduced one ZFFT algorithm, which can not only meet the real time requirement but also optimize frequency spectrum resolution.
出处
《铁道通信信号》
2008年第7期32-34,共3页
Railway Signalling & Communication
