摘要
在双向工频自动通信系统(TWACS)应用中,传统的时域检测方法由于提取的信号特征有限,在强噪声条件下无法进一步提高检测的正确率.为此,从频域滤波的角度给出了一种新的改进时频分析算法,该算法具有较高的时频分辨率和交叉项抑制能力,并且有很高的计算效率,可满足TWACS通讯的实时性要求.采用改进时频分析算法对实际电网信号分析的结果表明:该方法能够高效、准确地实现TWACS调制信号的检测.
can not be due to the In Two Way Automation Communication System （TWACS） applications, the detecting accuracy improved in the environment with strong noise using the traditional time-domain detection algorithm characteristic limitation of the detected signal. A new improved time-frequency analysis algorithm is of the frequency-domain filtering. This algorithm has a high time-frequency resolution and can reduce or even completely remove the cross-term. More importantly, the algorithm has an excellent com- putation efficiency to meet the requirement of the real-time working of the TWACS. After detecting and analyzing the actual signal from the power distribution network, the results shows that the algorithm can detect the TWACS modulated signals efficiently and correctly.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2007年第3期471-473,480,共4页
Journal of Harbin Institute of Technology
关键词
TWACS
时频分析
频域滤波
交叉项抑制
TWACS
time-frequency analysis
frequency-domain filtering
cross-term restrain
