CR-NOMAis utilized to accomplish high spectral productivity. Non-orthogonal multiple access (NOMA) has the capacity to be adjusted in the 5G organization. The number of subscribers can be built in the framework by using NOMA. Incorporating NOMA strategies into Cognitive radio networks incurs severe technical difficulties. The MIMO methods to CRNs will be utilized further to improve the performance of NOMA. It was defined that the performance of a Cognitive Radio Network (CRNs) with NOMA can be fundamentally enhanced by utilizing MIMO methods.