In this letter, we propose a new differential spatial modulation (DSM) scheme for two transmit antennas. The proposed scheme employs the same architecture as the existing block-based DSM scheme, but with a new cyclic signal constellation. We also provide the asymptotic decoding performance analysis for the proposed DSM scheme, based on which the design criteria are further developed to attain full transmit diversity as well as better decoding performance.
The numerical results validate the analytical error rate framework and verify the superiority of the proposed scheme.