The constant modulus algorithm(CMA) is suffered from the complex iteration computation and the analytical CMA (ACMA)is limited with resolvable source number.After analyzing the ACMA

a space-time ACMA is proposed to achieve blind source separation in CDMA smart antenna systems.By extending the traditional CMA only in time domain or in space domain to the space-time domain

the analytical solution is obtained with several joint approximate diagonalization of eigen-matrices

and converts the problem of solving the blind beamforming weigh to signal subspace.Numerical simulations illustrate that the proposed approach can overcome the limitation to the number of sources

and efficiently reduce the multiple access interference (MAI).