Simple linear transceiver designs for interference alignment in IEEE 802.11ac interfering network

Abstract

Recently, many people utilize the smart devices such as smart phones, tablet pad and laptop PC for their ubiquitous lifestyle. Because these devices might be always connected in wireless to the internet, the demands for wireless access is extremely increased according to the rapidly increasing the number of smart devices. To satisfy the request for the wireless connectivity and enhance the average throughput in a cell, IEEE 802.11ac standard released the multi-user multi-input multi-output (MU-MIMO) technique to transmit simultaneously to the multiple stations (STAs) from an access point (AP). However, we can expect the interference problem between basic service set (BSS) with MU-MIMO is getting worse by haphazard installation of the wireless APs. There exist various interference management schemes in these days, however, interference alignment (IA) has received much attention as making the concurrent transmission possible without causing any interferences in the multi-user interference channels. In previous IA approach method for MU-MIMO interference broadcasting channels (IBC), there are some drawbacks such as necessity of the cooperation between APs, requirement for the number of antenna to operate the algorithms and so on. In this paper, we propose a simple IA transceiver design to adopt in IEEE 802.11ac MU-MIMO network and solve the problem of the existing works. And we also show the performance analysis by simulation comparisons.