A resource allocation method for minimizing the power of the multi-user cooperative relay system based on

The present invention discloses a resource allocation method for multi-user cooperative relay system-based power minimization, the use of the equivalent channel gain of the system is converted to two-hop link virtual direct link, and relates to the subcarriers joint optimization problem distribution, relay selection and power allocation is decomposed into three sub-problems: first, an average channel gain, and the user's target rate, using the power minimization criteria to determine the number of sub-carriers occupied by each user; second, to the principle of the best channel conditions, taking into account the user's target rate, using subcarrier selecting the form of the relay and the user subcarrier allocation, to avoid a plurality of sub-carriers assigned to users, and reduces the computational complexity; third, using water-filling algorithm in conjunction with a channel environment, power allocation to ensure that the minimum total system power; in addition, the relay and performing subcarrier allocation selection process, such that the minimum energy loaded on each subcarrier, thus reducing the system can consumption.