System level analysis of noise and interference analysis for a MIMO system

Multiple input multiple output antenna communication system are gaining importance in the field of communication and ad-hoc networks due to increase demand for wireless throughput in band-limited channels. A system analysis is not complete without accounting for the system level noise and interference. This abstract provides a simple system level model including noise and interference to enable detailed analysis of MIMO system. Multiple-input-multiple-output systems have been studied for more than a decade, since Froschini's landmark conclusion that the theoretical information capacity increases linearly with the number of antennas for rich multipath channels [1]. Experimental characterization and model development have shown that the ideal linear capacity increase is not achievable in practice due to a number of factors including correlation of the communication channel, close antenna spacing and subsequent mutual coupling [2-4]. The capacity also depends on the type of channel state information (CSI) available. A popular expression for MIMO capacity is: [3]