WiMAX is a development of IEEE to solve the point to multipoint broadband outdoor wireless network problem. It is based on IEEE 802.16 family of wireless-networks standards. WiMAX provides wireless communication to areas where cable infrastructure is inadequate. WiMAX forum promised to provide better service in means of better coverage and quality but at present in Dhaka city Bangladesh, WiMAX technology is not able to support the coverage or throughput recommended by WiMAX forum. Subscriber is not getting their assigned bandwidth due to poor network arrangement. The essential necessity for this book is to improve coverage and quality and thereby making WiMAX technology as the best for wireless and mobile broadband communications. This book focuses on the performance improvement of WiMAX in Dhaka city, Bangladesh and identifying the best radio propagation model along with modulation technique and coding rate.