Mitigation of Interferers and Nonlinear Spurious Products for Digital Array and MIMO Systems

Low-cost fully-digital arrays and MIMO systems often make use of low-cost components, limited in linearity. These systems, with the lack of spatial filtering, are particularly sensitive to interferers. A two-layered approach combining analog/front-end and digital/back-end processing to provide effective dynamic range extension at the element level while decorrelating spurious outputs at the array level is proposed, with simulated and measured results being shown.