A method for blind classification of Space-Time Block Codes (STBCs) with a single receive antenna based on elementary fourth-order cumulants is proposed. Firstly

the theoretical values and variance of various signal constellations were obtained by computing the ensemble averages over the ideal noise-free constellation. And then the thresholds were gained by the likelihood ratio test (LRT) for the tests in the hierachical classification scheme. Finally

the automatic classification of modulation scheme was realized by comparing the experimental values and the thresholds. Furthermore

unlike other methods

this algorithm does not require any prior information of the channel coefficients

and noise power and

consequently

is well-suited for non-cooperative context. The simulation shows that the proposed algorithm performs well even at a low signal to noise ratio (SNR).