Wireless communication is an emerging field, which has seen enormous growth in the last several years. Wireless Networks and the exponential growth of the internet have resulted in an increased demand for new methods of obtaining robust, high capacity wireless networks. In this book, we have mainly focused on various methods for improving the spectral efficiency and link reliability of Wireless network using MIMO-OFDM system, and also observing the bandwidth efficiency with the varying length of cyclic prefix. We have also focused on different detection algorithms required in the reception of MIMO-OFDM signals, which have recently emerged as a very promising approach to solve detection problem.