OFDM Performance with Optimum Training Symbols in WiMAX 802.16e

This paper gives an analysis about OFDM based WiMAX 802.16e with optimum training symbols. In further, performance is evaluated by considering the variable Delay Spread, Frequency Diversity, and with different Adaptive Modulation and Coding. The evaluation of system is performed over simulations showing, Packet error ratio [PER] versus mean E
_b
/N
_o
with Rayleigh fading. The system is considered with an exponentially decay over power-delay.