摘要
工频通信技术是一种以中低压配电网作为传输信道的通信技术,其调制信号能穿过配电变压器传输,无需中继,通信距离远,可靠性高。但由于我国电网噪声复杂多变,工频通信上行信号的检测一直制约着工频通信系统的实用化进程。本文首先介绍了传统的时域差分检测方法;然后详细描述了本检测方法所采用的信号预处理技术,包括模拟信号预处理电路和FIR数字滤波技术;最后介绍了所采用的相关检测算法原理,并结合测试结果论证了所实现方法的有效性和可靠性。
Power frequency communication technology takes low and medium voltage distribution networks as the transmission channel,and its modulation signals can penetrate through distribution transformer without any repeater so that it has much longer transmission distance and higher communication reliability.However,as the noise of china,power grid is complicated and changeable,and the detection of uplink signal has been restricting practical process of TWACS.First,this article introduces the traditional time-domain differential detection method;and then the signal pre-processing technology used in this paper is discussed in detail,including analogue circuit and FIR digital filtering technology.Finally,the correlation detection algorithm is presented,and the test result demonstrates the effectiveness of this signal detection method.
出处
《电测与仪表》
北大核心
2010年第6期18-21,31,共5页
Electrical Measurement & Instrumentation
