Comparative Study of the Performance of Two way and One Way DF Relaying with Co-Channel Interference and Channel Estimation Error [ ]


It is known that cooperative communications enhances the bit error rate performance of wireless communication systems. In this letter, we show that cooperative communications also reduce the effect of channel estimation error and co-channel interference. A metric called signal-to-noise gap ratio is used to measure the amount of this reduction in decode and forward two-way relay network (TWRN) and one way relay network (OWRN) compared with the direct link between source and destination. The effect of different parameters on the ability of TWRN and OWRN to reduce the effect of channel estimation error and co-channel interference is studied. It is shown that OWRN achieves more reduction on the effect of channel estimation error and co-channel interference than TWRN. Furthermore, more reduction can be achieved if the number of relays increased.