The invention relates to an
underdetermined system real orthogonal space-time
block code blind identification method based on robust competitive clustering, and belongs to the technical field of
signal processing. The method comprises the steps of modeling a
signal receiving model relevant to a
virtual channel matrix, wherein the
virtual channel matrix comprises space-time code information and can be used for identifying the space-time code; then carrying out blind
estimation on the
virtual channel matrix by using a robust competitive clustering
algorithm; extracting the sparseness of the relevant matrix of the virtual channel matrix and an identification characteristic parameter of an energy ratio of non-
main diagonal element energy to
main diagonal element energy; and finally performing orthogonal space-time
block code identification according to the parameter. By the adoption of the
algorithm, a real orthogonal space-time
block code signal is subjected to effective blind identification under
low complexity, and the real orthogonal space-time block code signal can well work under a condition of a
low input signal-to-
noise ratio, so that the
system performance is improved; moreover, the robust competitive clustering
algorithm can be also used for carrying out blind
estimation on the number of source signals, and the
underdetermined system real orthogonal space-time block code blind identification method has a wide application prospect.