摘要
相关分析法是信号分析和工程测量中重要的技术方法。通过理论分析和数学仿真研究了两种相关法测量———相差法相关测量和时差法相关测量的理论基础和适用条件。相位差法相关测量要求源信号为单一频率的简谐信号 ,适宜测量较小的时差。时差法相关测量要求源信号为非单一频率的宽频带信号 ,适宜测量较大的时差。源信号的带宽越宽 ,互相关函数的峰值点的峰值优势越大 ,其测量的抗干扰性能越好。
Correlation analysis is an important technology in signal analysis and engineering measurement. Through theoretical analysis and mathematical simulations the theoretical foundation and applicability of two kinds of correlation measurement, named phase difference measurement and time difference measurement, are investigated. Phase difference measurement is applicable for the object with unfrequent source signal to measure lesser time difference. Time difference measurement can be used to measure larger time difference with multifrequent source signal. The broader the bandwidth of source signal is, the larger the superiority of peak value, thus the better the anti-jamming performance.
出处
《沈阳航空工业学院学报》
2004年第5期67-69,共3页
Journal of Shenyang Institute of Aeronautical Engineering
关键词
相关分析
相位差法
时差法
correlation analysis
phase difference measurement
time difference measurement
