Cooperative Greedy Pursuit Strategies are considered for approximating a signal partition subjected to a global constraint on sparsity. The approach aims at producing a high quality sparse approximation of the whole signal, using highly coherent

对相干信号的波达方向进行估计，仿真了music算法在相干信号情况下的失效，以及改进程序(The direction of arrival of coherent signals is estimated, and the failure of music algorithm in coherent signals is simulated)