OFDM downlink resource allocation method in multi-service power line communication

The invention relates to an OFDM downlink resource allocation method in multi-service power line communication. According to the resource allocation method, the service type of a user is expanded froma single service to multiple services, a multi-service multi-user system resource allocation model is established, and the system rate is maximized under the condition of power limitation; the service type is divided into voice users and data users, the two services coexist in the same system at the same time, resources are distributed according to service priorities, in the resource distributionprocess, the voice users with high priorities are met firstly, and only after the voice users completely meet the lowest requirement, the resources are distributed to the data users with low priorities; according to the invention, the requirement of multiple services and users on the lowest rate is met, and the overall transmission rate of the system is improved. 本发明涉及一种多业务电力线通信中的OFDM下行资源分配方法；该资源分配方法将用户的业务类型由单业务扩展到了多业务，建立