Feasible solution of centralized power control for multi channel cognitive femtocell network

The importance of power control is related to the interference problem between users on the cognitive radio network. It also keeps the battery device remains durable. A completion method uses the algorithm feasible solution to the centralized power control by looking at the feasibility of power vector value. Feasible solution can be achieved if the value of the power user is non-negative, meaning that SINR target can be achieved and the system can be implemented. This study is focused on the multi-channel that applied to multi-user. It can be concluded that the addition of the channels will increase the SINR of user. The smaller the size of the user group, the higher the SIR can be achieved.