Hybrid LDPC-STBC Scheme for BER Reduction in OFDM-based WiMAX System

Traffic volume rises as a result of the rapid expansion of mobile broadband usage. Investigate 4G 
technology options in order to better meet these future requirements using different technology 
standards. LTE and WiMAX are two newly created broadband wireless technologies that are being 
investigated. LTE and WiMAX, two of the most advanced next-generation mobile broadband 
technologies, serve as the technological cornerstones of 4G wireless broadband networks. For next
generation, or 4G, broadband wireless networks to better serve present and future demands and 
mobile internet applications, QoS structure is a crucial component. These technologies are made to 
support QoS both now and in the future. IEEE 802.16E, IEEE 802.16M (WiMAX), and LTE are 4G 
mobile broadband technologies that support a variety of applications with different QoS requirements. 
We have corroborated in this manuscript that in a flat Rayleigh fading channel, the hybrid LDPC
STBC coding scheme performs better than individual STBC for the similar SNR values for OFDM 
based WiMAX system.