The selection of MIMO antennas in a fading scenario and performance evaluation of MIMO and SISO systems in an indoor office environment

In broadband wireless communication system the multiple- input multiple-output (MIMO) antenna pattern improves wireless communication system substantially with using adaptive techniques like power allocation and antenna selection. In multiple input multiple output system, a large number of antennas are used in the transmitting and receiving end as well. So a multiple number of RF chains are employed where each RF chain consists of analog to digital converter (ADC), preamplifier, mixer, power amplifier, automatic gain control (AGC), modulator, low pass filter (LPF), digital to analog converter (DAC) etc. In this paper, it has been discussed how the RF chain should be utilized in the receiving end so that without using all chains simultaneously the performance of the MIMO system will be better. Further more, the performance evaluation of MIMO and SISO antenna system has been done experimentally in an indoor office environment.