Implementation of Hybrid Mimo over Ieee 802.16 Using Real Time Speech Signal

This paper presents the analysis of IEEE standard for wireless Metropolitan Area Networking i.e. WiMAX system with the implementation of Hybrid Antenna Diversity technique in its physical layer. Currently in the 4G standardized era, the goal of any developing technology is centered around just two features: Fastest performance and Highest accuracy. The development of IEEE 802.16 standard has bridged up the space between modern cellular telephony and recent networking technology aspects. As the WiMAX standard has been categorized as the 4G standard, obviously up to certain extent, it is fulfilling the above mentioned two features that the latest standard should possess but the advancements are still required under unfavorable conditions. The central idea of this paper is to wave off the limitation of this latest emerging standard by the implementation of hybrid antenna diversity scheme into it. The hybrid antenna diversity scheme is the well designed combination of Matrix A MIMO i.e. STBC system and Matrix B MIMO i.e. SM system. Matrix A MIMO is based on the Alamouti coding technique wherein the error performance can be improved by enhancing diversity gain whereas Matrix B MIMO is based on the VBLAST architecture that improves data rate by the application of multiplexing gain. In this paper, this concept has been realized by the MATLAB modeling of WiMAX structure with Hybrid MIMO technique.