Abstract: Aiming at the problem that the envelope of the uncoded space-time labeling diversity (USTLD) system based on quadrature amplitude modulation (QAM) constellation is not constant and the spectrum efficiency is low, the design method of mappers for phase shift keying (PSK) constellation and the USTLD system based on media based modulation (MBM) is proposed respectively. A bound of the average bit error probability of the proposed system is derived. Due to the high detection complexity of the USTLD-MBM system, a low complexity detection algorithm for the system is given. Simulations show that the error performance of the USTLD-MBM system is better than that of the USTLD system under the same spectral efficiency. In the USTLD-MBM system, the bit error performance (BER) of the sphere decoding algorithm is almost identical to the maximum likelihood (ML) algorithm, and the complexity is reduced by about 50%.

Key words: uncoded space-time labeling diversity, media based modulation, performance analysis