Throughput Enhancement and Performance Improvement of the OFDM Based WLAN System

This paper presents two models of WLAN-OFDM, which offer a new decision policy in the Adaptive Modulation (AM) technique of choosing the order of modulation schemes to map the data onto the carriers. Numerous modes will be tested in this paper. The common concept in these proposed models is using the high order modulation schemes together with the low order ones at low SNR values. In model, the percentage of using the different modulation schemes will be controlled by the SER value only. So the SER performance of the high order modulation schemes such as 128, 256QAM will be improved.