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随着电子技术的发展，基于阵列信号处理的ＤＯＡ（波达方向）估计将广泛应用于电子对抗的侦收系统及引战配合。本文介绍了高分辨率的ＤＯＡ估计的基本算法——典型ＭＵＳＩＣ算法。典型ＭＵＳＩＣ算法是以源发射信号相关矩阵为基础，因此需以窄带假设为前提。由于大部分人造信号（如ＡＭ、ＦＭ、ＢＰＳＫ等）都具有循环平稳特性，利用这一特性，以循环相关矩阵为基础，仍用ＭＵＳＩＣ算法，不仅可解决宽带源方向估计问题，而且可以大大提高ＤＯＡ估计的噪声抑制能力，增加阵容量。
With the development of electronic technology, DOA (Direction of Arrival) estimation based on array signal processing will be widely used in electronic countermeasure detection system and warfare cooperation. This article describes the basic algorithm for high-resolution DOA estimation - a typical MUSIC algorithm. The typical MUSIC algorithm is based on the correlation matrix of the source transmit signal, so a narrowband assumption is required. Because most of the artificial signals (such as AM, FM, BPSK, etc.) have a cyclostationary property, the MUSIC algorithm is still used on the basis of the cyclic correlation matrix to solve the problem of estimating the direction of the broadband source and can be greatly improved DOA estimates the noise immunity, increasing the array capacity.