  Orthogonal Frequency Division Multiplexing (OFDM) is a multi-carrier
modulation scheme that provides efficient bandwidth utilization and robustness
against time dispersive channels. This paper deals with the basic system model
for OFDM based systems and with self-interference, or the corruption of desired
signal by itself in OFDM systems. A simple transceiver based on OFDM modulation
is presented. Important impairments in OFDM systems are mathematically analyzed
