MIMO – OFDM : Technology for high speed wireless Transmission

-The demand for increased channel capacity in wireless and mobile communication has been rapidly increasing due to multi fold increase in demands of mobile data and multimedia services. In the present scenario, high data rate are provided by WLAN, WiMax and LTE/ LTE-Advanced (LTE-A). Developing a wireless system with more spectral efficiency under varying channel condition is a key challenge to provide more bit rates with limited spectrum. MIMO system with OFDM gives higher gain by using the direct and the reflected signals, thus facilitating the transmission at high data rate. Efficient implementation of MIMO-OFDM system is based on IFFT/FFT algorithm and MIMO encoding. The industry standards of LTE/LTE-A have also been taken up in this paper.