Performance Analysis of Qo-Stbc for Increasing Transmit Diversity in Rayleigh Fading Environment- A Review

Abstract

The demand for mobile communication systems with high data rates has dramatically increased in recent years. New methods are necessary in order to satisfy this huge communications demand, exploiting the limited resources such as bandwidth and power as efficient as possible. MIMO systems with multiple antenna elements at both link ends are an efficient solution for future wireless communications systems as they provide high data rates by exploiting the spatial domain under the constraints of limited bandwidth and transmit power. In this paper, a comprehensive study of STBC is done. Furthermore, advanced QOSTBC codes are also discussed in this paper. These codes have the advantage of providing full rate as well as diversity gains. In this paper, schemes which makes possible the QOSTBC codes to gain full transmission diversity by upsetting the balance of the transmit power and rotating constellations have been discussed.