Space-time diversity applied to single-user environments and MIMO transmission channels

This paper presents a closed solution to the problem of designing a single-user communication system considering the use of space-time diversity at both the transmitter and receiver sides, that is, a Multi-Input-Multi-Output (MIMO) structure. Three different design criteria and algorithms are considered: Matched-Desired Impulse Response, Minimum Mean Square Error and Zero Forcing. A technique for synthesizing and designing FIR filters based on frequency domain specifications and a minimum square error criterion is also presented. The time response design of the spatio-temporal filters exploits the phase of the frequency responses, which is a degree of freedom of the problem. Some simulations and results are also presented so as to evaluate the performance of the proposed techniques.