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提出了采用扩展卡尔曼滤波器估计入射波参数（入射角度和入射功率）的方法．首先根据天线阵接收空间信号的特点，建立描述入射波参数的空间状态方程．其次为便于用数学方法进行入射波的参数估计，将含有复数的空间状态方程变换成用实变量表示的空间状态方程．然后，经扩展状态，将入射波的空间状态方程变成非线性系统的状态方程，利用扩展卡尔曼滤波器实现入射角度和入射功率的联合估计．对天线阵接收一个入射波情况，采用ＭＡＴＬＡＢ语言在计算机上进行仿真，其结果验证了所提方法的有效性．
A method of estimating incident wave parameters (incident angle and incident power) using extended Kalman filter is proposed. First of all, according to the characteristics of antenna array receiving spatial signal, the paper establishes the equation of state describing the incident wave parameters. Secondly, in order to facilitate the parameter estimation of incident wave by mathematical method, the equation of state of space containing complex numbers is transformed into the equation of state of space represented by real variables. Then, the state of the incident wave is transformed into the state equation of the nonlinear system by the extended state, and the joint estimation of the incident angle and the incident power is achieved by using the extended Kalman filter. The antenna array to receive an incident wave situation, the use of MATLAB language in the computer simulation, the results verify the effectiveness of the proposed method.