Distribution and Density Functions of Capacity for Layered Space Time Architecture

In wireless communications spectrum is a scarce resource, and hence imposes a high cost on high data rate transmission. With the emergence of multiple antenna system, another very resourceful dimension-space was utilized for information transmission in air. It has been proved that multiple antenna systems provide higher gain in capacity without increasing the use of spectrum, reliability, throughput, power consumption and less sensitivity to fading, therefore leading to high data rates of wireless communication systems, which is the most sorted outcome of all research work. The study of performance limits of Multiple Input Multiple Output (MIMO) system becomes most important to design and understanding MIMO systems. There are many schemes that can be applied to MIMO systems, such as space time block codes, space time trellis codes and Layered Space Time Architecture. In this paper, the performance of general MIMO system based on Layered Space Time Architecture is studied. For different number of transmit and receive antennas, the Probability Density Function (pdf) and Cumulative Distribution Function (cdf) distributions for capacity of different layers for different SNRs were analyzed and plotted.