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In the downlink NOMA-OTFS vehicular system, considering the cross-domain transmissionpower allocation can be based on three objectives: (l) Ensuring the high-speed user meet its QoS andtarget rate R0, (2) Guaranteeing the NOMA users can successfully decode the signal of the high-speeduser: (3) Ensuring successful signal detection of the NOMA users.The objective function aims to maximize the minimum data rates of Ui,i =l,...,K . The constraint guarantees the target data rate of while ensuring that the NOMA users can successfully decode the signal of with a given total system power limit.Since the optimization problem is non-convex. auxiliary variable is introduced totransfer the original problem into a convex one as the formula,the IP-AO algorithm as follows. |