Suppressed inter-cell asynchronous interference by delay-tolerance SLNR precoding

The different propagation times due to the distinct distance between the BSs and MSs result in inter-cell asynchronous interference, which severely destroy system performance. How to mitigate inter-cell asynchronous interference by making use of SLNR precoding is the key to this paper. Firstly, a framework of Cooperative Base Station Systems (Co-BS) was developed and the delay between the cells was analysed. Secondly, a delay-tolerance SLNR precoding was brought forward, in LTE system which exist delay, to suppress inter-cell asynchronous interference. And this method can also reduce the complication of terminal. Finally, the numerical delay-tolerance SLNR precoding simulation results are presented based on Cooperative Base Station LTE Systems, the conclusions show that it can mitigate inter-cell asynchronous interference. And the method can reach a good performance under different antenna configuration, which make performance progress compare with receive algorithm. Besides, the performance is affected by channel estimation error, but it can still be accepted.