NOMA-based cognitive radio Internet of Vehicles safety energy efficiency beam forming method

The invention provides a cognitive radio Internet of Vehicles safety energy efficiency beam forming method based on NOMA, and the method comprises the steps: determining the total energy consumption of downlink transmission of a multi-antenna base station based on a first beam forming weight vector and a second beam forming weight vector transmitted by the multi-antenna base station; when the signal-to-noise ratio of the multi-antenna automobile is greater than or equal to a preset signal-to-noise ratio, the communication link quality of a strong user in the single-antenna automobile is greater than or equal to the communication link quality of a weak user in the single-antenna automobile; and when the sum of the modulus of the first beam forming weight vector and the modulus of the second beam forming weight vector is smaller than or equal to the maximum allowable transmitting power of the multi-antenna base station, the safety energy efficiency of the cognitive radio Internet of Vehicles is maximized based