Spirit-like Multiuser Symbol Detection with Multiple Receive Antenna

This paper proposes blind multiuser detection (MUD) system that does not require any training sequences (bits) for symbol detection. This scheme can be applied for multiple receive antenna systems to achieve power gain at the receiver. Although in MUD systems all algorithms employed are basically blind, the proposed scheme can not only separate each user´s signal but also achieve high transmission performance for each user without a priori information of a channel and transmit sequence. A correlation-based algorithm is proposed here in order to estimate channel in blind methods. By introducing the interference cancellation and minimum mean square error (MMSE) detector, vector channel impulse response (VCIR) can be identified by an estimation of signal parameters via rotational invariance techniques (ESPRIT)-like method and singular value decomposition (SVD). By using the estimated VCIR, it is possible to detect symbols by nulling and zero interference cancellation method similar to that of a vertical bell laboratory space time code (V-BLAST) system. Finally, performance of the proposed scheme is verified by extensive computer simulations