通道幅相不一致时的全向测角误差分析  

Error Analysis of Omni-Directional Angle Measurement with Amplitude and Phase Inconsistency between Channels

作　　者：田超[1] 文树梁[1] 

机构地区：[1]北京无线电测量研究所,北京100854

出　　处：《现代防御技术》2015年第6期104-111,共8页Modern Defence Technology

摘　　要：在理想情况下,基于均匀圆阵的米波全向雷达可联合-1阶、0阶和和1阶相位模式实现全方位的无模糊测角。然而在实际工程中,各接收通道幅相特性往往不一致,这将导致激励出的相位模式中包含误差项从而引起明显的测角误差,而且该误差无法补偿,只能通过校正通道间的幅相误差或选择合适阵列参数的方式来减小。为此,通过理论推导得到测角误差与各接收支路幅相误差之间的解析关系式,明确了幅相误差对测角误差影响的同时也为合理选阵列参数以减小幅相误差引起的测角误差提供了理论依据,仿真分析验证了理论误差分析的正确性并给出了最优的阵列直径取值。In ideal scenarios, unambiguous azimuth angle is available by using the phase mode - 1, 0 and 1 based on the omni-directional VHF radar with uniform circular array. However, in engineering, the amplitude and phase character of each receiving channel is usually different. This inconsistency may cause some errors of the measured angle. Moreover, the errors can＇ t be compensated and can only be de- creased by calibrating the inconsistency or choosing the array parameters. For this purpose, the specific relationship between angle error and amplitude and phase inconsistency is deduced theoretically so that a theoretical reference is provided for the optimal selection of array parameter in order to reduce the angle error. Simulation results demonstrate the correctness of the deduced formulas and the optimal diameter of the array Key amplitude is also given.

关 键 词：米波雷达 均匀圆阵 全向测角 相位模式 幅相不一致 测角误差分析 

分 类 号：TN953.5[电子电信—信号与信息处理] TP391.9[电子电信—信息与通信工程]