Multi-user communication system physical layer control method under non-ideal hardware condition

The invention relates to a multi-user communication system physical layer control method under a non-ideal hardware condition. The method comprises the following steps: establishing non-ideal hardware models at a base station, an intelligent metasurface and a user terminal; establishing a signal to interference plus noise ratio model at the user terminal and the eavesdropper; acquiring a downlink security rate of each user terminal according to the two signal to interference plus noise ratio models; according to the non-ideal hardware models at the base station, the intelligent metasurface and the user terminals and the downlink security rate of each user terminal, an optimization problem for maximizing the security transmission fairness between the user terminals is established, and the optimization problem is solved. And obtaining an optimal base station precoding matrix for base station operation and an optimal intelligent metasurface reflection coefficient matrix for intelligent metasurface operation. Com