Resource allocation method for maximizing spectrum efficiency in terahertz communication system

The invention provides a resource allocation method for maximizing system spectrum efficiency in a terahertz communication system. The method comprises the steps of firstly, on the basis of a channel model of a terahertz indoor communication system, establishing a joint optimization problem of sub-band allocation and power allocation under the constraint of the lowest rate of a user by taking maximization of spectrum efficiency as a target; secondly, based on a decomposition theory, decomposing a joint optimization problem into two sub-problems of sub-band distribution and power distribution; and allocating sub-bands based on a long user use center window principle and a bipartite graph matching method Hungary algorithm, and then performing power optimization by using a sequential quadratic programming algorithm to obtain a final sub-band allocation and power optimization result. According to the resource allocation method, higher system spectrum efficiency can be achieved by utilizing the characteristics of