本文提出了一种在DFT波束空间实时估计入射到均匀圆阵(UCA)上宽频段(1～18GHz)信号的频率、方位角和仰角的方法。该方法可在时间欠采样条件下实现频率无模糊估计,在空间欠采样条件下,用整数搜索法实现方位角和仰角无模糊估计,且频率、方位角和仰角估计可自动配对。模拟频率间接估计算法的估计方差比直接估计算法的方差要小2～3个数量级。仿真实验表明了算法是有效的。 This paper presents a method for real-time estimation of the frequency, azimuth and elevation of wideband (1 ~ 18GHz) signals incident on the Uniform Circular Array (UCA) in DFT beam space. The method can achieve frequency-free fuzzy estimation under the time-under-sampling condition. Under the condition of space under-sampling, the azimuth and elevation angles can be estimated without any ambiguity by the integer search method, and the frequency, azimuth and elevation estimation can be automatically paired. The estimated variance of the analog frequency indirect estimation algorithm is 2 to 3 orders of magnitude smaller than the variance of the direct estimation algorithm. Simulation results show that the algorithm is effective.