Nowadays, multicarrier transmission is very popular because of the high data rate requirement of wireless
systems. Orthogonal frequency-division multiplexing (OFDM) is a special case of multicarrier transmission.
It is considered an effective technique for frequency-selective channels because of its spectral efficiency, its
robustness in different multipath propagation environments, and its ability of combating intersymbol interference.
Losing subchannel orthogonality causes interchannel interference, but many conventional channel
estimators assume that the channel is time-invariant during one OFDM symbol. This assumption causes
error floors along the OFDM symbol for high-mobility cases. In this paper, we propose 2-dimensional pilot
symbol-assisted channel estimation for wireless OFDM systems by using frequency and time-domain interpolation.
This method has the advantage of minimizing the system complexity and processing delay while
closely approximating the actual mobile channel. The performance of our proposed method is compared to coherent
modulation with perfect channel estimation as well as other conventional channel estimation methods.
Different detection techniques were used to test our proposed channel estimation algorithm.