Research on direction finding error of direction finding system vehicle radio

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.