New and Efficient Interference Alignment Technique for Wireless Cellular Networks

The gains of originally proposed interference alignment based transmission scheme collapse in a cellular network due to the unaligned out of cluster interference and because the network is mostly working in the low or middle SNR regions. As a result, only aligning the interference does not help and even the other baseline transmission schemes are underperforming the interference alignment. Here we have proposed a new interference alignment scheme, which not only improves the originally proposed scheme but also out performs the base line transmissions. We have shown with the help of simulation results that our scheme provides up to 10% gains in spectral efficiency and up to 35% gains in cell edge throughput over the other best baseline scheme. Our approach is based on considering the desired signal and as well as out of cluster interference in the design of transmit precoding. Moreover, our scheme is simpler than the original alignment in the sense that it is based on a two cells coordination cluster and it can be designed in a distributed fashion in each cell and it requires lesser amount of feedback. I. INTRODUCTION