摘要
针对传统塔康机载设备方位测量方法测量误差大、抗干扰能力弱的问题,根据塔康标准信号的特征提出了基于正弦曲线拟合法的方位精确测量方法,计算了传统方法与正弦曲线拟合法的测量误差,定义了被测信号的品质因数,通过它可确定测量值的可信度。通过仿真,比较了不同信噪比情况下传统测量方法和精确测量方法的性能,研究了当被测信号发生畸变时,品质因数的变化情况。仿真结果表明精确测量方法明显提高了塔康系统的方位测量精度和抗干扰能力,品质因素较好地反映了信号的畸变情况。
The traditional bearing measuremem method for TACAN airborne equipment has the problems of large error and weak anti-jamming performance. An accurate measurement method was put forward according to the characteristics of TACAN impulse signal, which implemented angle measurement based on sinusoidal curve fitting. Measurement error of traditional method and the accurate measurement method was calculated out. The signal＇s quality factor which can confirm the reliability of the measurement value was defined. Simulations were carried out under different SNRs to compare the performance of the traditional method and the new method, and to analyze the variation of quality factor when the signal had a distortion. The result proved that the new method greatly improves the measurement precision and anti-jamming performance, and the quality factor better reflects the signal＇s distortion.
出处
《现代导航》
2012年第1期28-31,共4页
Modern Navigation
关键词
塔康
曲线拟合
品质因数
TACAN
Curve Fitting
Quality Factor
