Performance Comparison of Linear Receivers with Interference Alignment

Optimum performance of any transmission scheme is implicitly coupled with the optimal receive-strategy. Linear receiver strategies for the interference alignment based cooperative transmission are investigated here. Two different network scenarios are considered and compared using the spectral efficiency and cell border performance. The studies are carried out with perfect global channel knowledge and without any feedback delay. The sum rate results show that the receiver strategies focusing on the maximum interference suppression perform better then the strategies focusing on strengthen the receive signal for the improvements in spectra efficiency with interference alignment. The cell border performance is better when the receiver focuses on the signal combining. The performance of the receivers differs drastically in a small network as compared to the large network.