''If I have seen further, it is by standing on the shoulders of giants.'' is covered very truthfully by Sir Isaac Newton. Ideas have given way to ideas. When Marconi invented wireless communication 100 years ago, we had no idea that life would one day seem impossible without it. It has penetrated every aspect of human life and resulted in endless demands for bandwidth and spectrum. And standing on the shoulders of giants, Teletar and Foschinigave the MIMO system technique which would maximize the spectral efficiency of the wireless system compared to all current technologies. Multiple antennas are used for transmission and reception to increase the capacity of the wireless channel. Capacity is expressed as the maximum achievable data rate for an arbitrarily low probability of error. This technology received a boost when TarokhEtA introduced its spatio-temporal trellis coding techniques and Alamouti introduced its spatio-temporal block coding techniques to improve diversity-based link-level performance. Another boost came in the form of BLAST technology. But in this article, our focus will basically be on the MIMO wireless channel and how to determine its capacity under different conditions. And space-time blocks coding techniques. We will discuss the advantages of the discussed topic and future prospects for improving the use of the limited spectrum available. MIMO Before we proceed to our discussion of MIMO antennas, we should know something about multi-antenna system. Single input single output (SISO) is the well-known wireless configuration, single input multiple output (SIMO) uses a single transmit antenna and multiple receive antennas, multiple input single output (MISO) has multiple transmit antennas and a r ... middle of paper ... multiple antenna wireless systems without channel state information (CSI) at the transmitter have also been studied. The most prominent space-time blocking codes (STBCs) are the orthogonal STBCs (OSTBC), and the most popular OSTBC is the Alamouti code. Future research scope includes simulation to obtain a quasi-orthogonal space-time blocking code with full diversity gain at full bitrate. There should also be a scope of research to develop an orthogonal space-time block code having full diversity gain with full throughput for more than two transmit antennas. There should be more number of quasi-orthogonal space-time matrices for a large number of antennas on the transmitting and receiving antennas. Further research should be done to obtain the orthogonal space-time block code and quasi-orthogonal space-time block code that minimizes the fading effect.