Reducing overhead in hybrid precoding design for millimeter wave MIMO systems

To compensate the high path loss in millimeter wave (mmWave) systems, large antenna arrays are used. In such circumstances, low cost hardware and power consumption are the main challenges. Furthermore, the hardware is tasked with computation of high dimensional optimal matrices of hybrid precoding design using the Orthogonal Matching Pursuit (OMP). This paper proposes an algorithm to enhance the efficiency of OMP reconstruction algorithm. The spectral efficiency of the mmWave system using the proposed algorithm is compared with the previously reported research and the optimal case (fully digital precoder). The results show that the proposed algorithm performs very closely to the optimal design even though the complexity of the design is reduced.