earticle

영어

Interference alignment scheme, because of non ideal channel, can cause interference to primary user increases, it is worse at the same time the user's transmission rate, aiming at this problem, this paper studies the multiple antenna system is a kind of cognitive radio interference can achieve full multiplexing gain alignment method, analyses the interference alignment method under the condition of imperfect channel state information of the optimal transmission problem, and according to this problem, put forward the iteration method of interference alignment schemes, the simulation results show that this method is compared with the previous beam forming algorithm, and can obtain more transmission rate, improve the capacity of the time the user's system.