Before revision:  Our theoretical analysis is original, which does not simply follow from any existing work. Our comprehensive empirical study shows that our algorithms are tremendously faster than MUSIC, while their target detection accuracies in massive MIMO radar are almost as good as MUSIC.
After revision:  Comprehensive numerical study demonstrates that our new methods are tremendously faster than MUSIC, while their target detection accuracies in massive MIMO radar are almost as good as MUSIC.