1979年美国人R.O.Schmidt提出著名的MUSIC（Multiple Signal Classification多信号分类）算法，标志着空间谱估计测向进入了繁荣发展的阶段，经过三十年的发展，可以说其理论已经比较成熟 -1979 americans R.O.S chmidt put forward the famous MUSIC (Multiple Signal Classification more Signal Classification) algorithm, marked the space spectrum estimation to direction into the prosperity and development stage, after 30 years development, can say the theory has more mature