OPTIMAL MULTIUSER DOWNLINK COOPERATIVE BEAMFORMING IN COGNITIVE RADIO NETWORKS USING ADMISSION CONTROL
A.Suban, M Harshini, A Madhura, M Shreenithi · International Journal of Engineering Applied Sciences and Technology · 2022
In our proposed work, optimal multiuser downlink cooperative beam forming in cognitive radio networks is considered with target SINR. In already existing works, the transmit beam forming vectors for maximum number of admitted secondary users into the cognitive radio network are designed with fixed target SINR and sum power constraints. However, this joint optimization problem becomes infeasible as some users may absorb more power to meet the target SINR. Hence, the objective of this work is to design optimal multiuser downlink beam forming vectors for primary and secondary base stations in a cooperative manner using admission control satisfying the practical bounded SINR constraints. This is solved using approximate message passing technique. The performance of this cognitive radio network is analysed with the constraints. Keywords—Beam forming