Performance Analysis of MIMO Relay Systems in the Presence of Co-Channel Interference and Feedback Delay

In this paper we analysis about MIMO relay systems in the presence of co-channel interference and feedback delay. Now a days, fading is a serious problem to transmit the information from transmitter to the receiver. Due to this Fading, we can’t get the full diversity order. so, that for achieving a Multiuser diversity, we have to analyze the performance of Average SER and outage probability of the system by increasing SNR over Rayleigh fading channels with feedback delay and co-channel interference. For both the average SER and outage probability of the systems, exact as well as approximate closed form expressions at the high SNR regime are obtained, and the Multiuser diversity order achieved by the systems are characterized. Our results suggest that the full multiuser diversity order can only be achieved when there is ideal feedback, and once in the presence of feedback delay, the diversity order reduces gradually. In addition, the key parameters such as the outage probability and average SER play very important role in the performance analysis and the design of the wireless communication systems over Rayleigh fading environment. Our results suggest that the full multiuser diversity order can only be achieved when there is ideal feedback, and once in the presence of feedback delay, the diversity orderreduces gradually. The proposed power allocation offers a significant improvement on the SER performance.