车载无线电测向系统测向误差研究

Research on direction finding error of direction finding system vehicle radio

无线电移动监测测向车是无线电管理部门查找无线电干扰的主要技术手段,与固定测向站相比车载测向系统其测向误差要大很多,远远不能满足实际无线电干扰查找工作的需要.通过分析测向误差产生的原理,找出影响车载测向误差的主要误差原因.再通过实际测量装车前后测向设备的测向精度,对实验的数据进行分析对比,得到以频率和入射角为二元变量的误差修正表,用修正表的方法来消除车体对测向的影响,提高移动车的测向精度.实际的测试表明该方法对提高移动测向车的精度是现行有效的.

The vehicle radio with DF is the main technology way to detect radio interference for radio management section.But the direction finding accuracy of vehicle radio direction finding system is much worse than that of fixed direction finding station.It may easily generate error,which is far from meeting the needs of radio interference detecting and finding.By analyzing the principle of error generation of direction finding,the main reason that causes vehicle radio direction finding error is found.Then by measuring the accuracy of direction finding before and after the direction-finding device being loaded,the experimental data is analyzed and compared.An error correction table with binary-variants of frequency and angle of incidence is obtained.Then the error correction table can be used to eliminate the influence of vehicle body on direction finding.The accuracy of DF on vehicle radio is improved.The practical measurement shows that this method is feasible and effective for improving the accuracy of DF on vehicle radio.