使用双阵元的双目标快速DOA估计算法  

Fast DOA Estimation Algorithm for Two Targets Using Two Antennas

作　　者：张珂[1] 张剑云[1] 

机构地区：[1]解放军电子工程学院,合肥230037

出　　处：《火力与指挥控制》2012年第6期192-195,共4页Fire Control & Command Control

摘　　要：比相单脉冲测角法通常被用来对1个目标进行DOA估计,受限于已知数据的数量,该算法无法对多个目标进行DOA估计。在比相单脉冲测角法基础上,利用目标多普勒频率对空间相位的影响提出一种使用双阵元的双目标快速DOA估计算法。该算法对于硬件的要求几乎与比相单脉冲测角法一致,功能上可以同时对2个目标进行DOA估计,且计算量小,实时性高。通过理论分析与仿真实验证明了算法的有效性并进一步探讨了信噪比、方位角、数据采集间隔对估计精度的影响。Phase comparison monopulse algorithm is often utilized to estimate DOA of one single target.Nevertheless,restricted to the number of knowndata,it can never estimate DOAs of more than one target.Based on phase comparison monopulse algorithm,an algorithm to estimate DOAs of two targets with only two Antennas is proposed which makes use of targets＇ Doppler frequencies.The requirement of hardware for this algorithm is almost as same as phase comparison monopulse algorithm;moreover,it has the function of estimate DOAs of two targets simultaneity with low computational burden and good real-time performance.The theoretical analysis and simulation results demonstrate that the algorithm is effective and discuss the effects to estimation accuracy due to signal noise ratio,azimuth and interval of data sampling more thoroughly.

关 键 词：空间相位差 多普勒频率 比相单脉冲 DOA估计 

分 类 号：TN955[电子电信—信号与信息处理] TN911[电子电信—信息与通信工程]