Maximum SINR design and performance analysis of MIMO communication systems with tapped delay line structure

The paper presents a simple method of the maximum SINR (signal to interference plus noise ratio) design of MIMO (multiple input multiple output) communication systems using a TDL (tapped delay line) structure. The transmitter and receiver weights are determined alternately, optimizing one side by fixing the other, and this operation is repeated until the SINR converges. The performance of MIMO systems using the proposed approach is investigated, through computer simulations, and it is demonstrated that, though it requires high computational cost, the TDL structure brings high ability to mitigate the influence of frequency selective fading, particularly when the duration of the delay profile is long. Moreover, experimental results show that the equable distribution of the resources (weights and delay units) to both arrays is a better choice than the concentration of them to one side of the transmitter or receiver.