Abstract: A MIMO-based spacetime signal processing technique, spacetime mapping (STM), is proposed in this paper. The space-time mapping technique, proposed from the viewpoint of reducing correlations in adjacent antennas, can either be on the symbol-level or on the chip-level. Simulation results show that the proposed technique can significantly improve the bit-errorrate (BER) performance of a MIMO CDMA system.

Key words: space-time mapping, spreading
, MIMO