In this paper. the ergodic sum rate maximization problem is considered in the multiple-input single-output non-orthogonal multiple access (NOMA) system with statistical channel state information at the transmitter. First. we derive the analytic expression of the ergodic sum rate with given arbitrary precoders. https://lecoureures.shop/product-category/plein-air-femme-chaussures-bottes-isolees/