Deterministic processing for MIMO systems

In this paper, we study a deterministic scheme in a Ricean fading single spatial stream based multiple-input multiple-output (MIMO) communication system, which utilizes deterministic beamforming in the transmitter and deterministic combining at the receiver. The proposed method combines the existing deterministic transmit and receive processing schemes and the MIMO system is used to provide diversity and array gain. We propose a modified maximum likelihood receiver in which detection is performed by maximizing the likelihood function of the combined received signal with deterministic combining. By assuming perfect knowledge of the mean value of the channel matrix at the transmitter, we obtain a beamforming vector for the transmitter. The deterministic receive weights are chosen by minimizing the the union bound on the symbol error probability, which is the average pairwise error probability. The performance of the proposed scheme is compared with that of square-law combining and maximal-ratio combining through simulations.