On Partners and Channel Signal-to-Interference-Plus-Noise Ratio (SINR) in Cooperative Communications

Cooperative communication or cooperative diversity, as it is sometimes called, is a relatively new technique aimed at improving the channel capacity of wireless networks, through the enhancement of transmit and spatial diversity. This is brought about by an exploitation of the antennas on wireless devices. A major benefit of this technique is that this gain in diversity is achieved without the physical installation of these multiple antennas at the transmitter or even the receiver. In this paper, we attempt to investigate the effect of employing the use of relaying partners on the signal-to-interference-plus-noise ratio (SINR) on each of the channels involved in cooperative cooperation, that is, source-destination, source-relay, relaydestination and source-relay-destination; making use of the amplify-and-forward cooperative diversity scheme. Implementation was also carried out with multiple relays as a means of comparing with a single-relay scenario. The findings show that the SINR with the help of the relaying partner in cooperation is approximately 10 4 times than that without the help of a relaying partner node.