MIMO communication systems employing per transmit antenna differential mapping (PADM)

This work proposes multiple-input multiple-output (MIMO) communication systems employing different differential mapping per transmit antenna, i.e., per transmit antenna differential mapping (PADM) and its demodulation by means of per-survivor processing (PSP). The features of PADM are as follows: (1) it can be applied to both transmit diversity (TD) and space multiplexing (SM); (2) it can be applied to multiple-input single-output (MISO) as well as MIMO; (3) it can perform maximum-likelihood detection without channel state information (CSI) by means of finite-state PSP. First, this paper evaluates PSP based on the MP pseudo inverse matrix, and proposes a mapping scheme for PADM according to the evaluated results. Next, this paper shows configurations of TD and SM. Finally, computer simulation confirms that the proposed PADM has excellent performance in the case of TD and SM.