基于最小二乘法的短波探测设备扫频模式研究

The Short-wave Detection Equipment based on the Method of the Least Squares Frequency Sweep Pattern Research

短波探测面临着现有的常规扫频模式单一、探测周期长、容易恶化电磁环境等问题。针对常规扫频模式中等间隔探测周期长的问题,提出了一种基于最小二乘法的信道扫频模式。以REC533模型给出的数据为基础,运用REC533预测MUF和LUF缩小扫频范围的方法,结合最小二乘法对电离图趋势拟合进行了改进扫频模式的研究。仿真表明,与常规的扫频模式相比,该扫频模式在保证扫频精度的同时,有效提高了扫频速度,对岸海短波远程通信具有重要应用价值。

The short-wave detection is faced with the existing conventional single sweep mode,long detection cycle and worsen electromagnetic environment.Because conventional frequency sweep pattern detection cycle is long,this paper propose a frequency sweep model based on least mean squares.Based on the analysis of REC533 software and on the basis of simulation data,we use forecasts REC533 to detecte MUF and LUF so that we narrow the range of frequency.Combined with the least mean squares fitting of ionization figure trend has carried on the research to improve frequency sweep pattern.The simulation shows that compared with the conventional frequency sweep pattern,this sweep pattern ensures the precision of frequency sweep at the same time,effectively improves the speed of frequency sweep.It has important application value in shortwave remote communication between sea and land.