Analysis of Channel Estimation in OFDM Communication System

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) has been considered as a widely used multicarrier (MC) scheme used in 4G and beyond wireless communication system due to its high data rate and capacity with large spectrum efficiency. In OFDM, channel estimation can be treated as main obstacle to achieve high bit error-rate performance. Some popular estimation algorithms, such as; Least Square (LS) and Minimum Mean Square Error (MMSE) have been used to determine channel estimation of pilot subcarriers. In literature, the performance of such estimators has been evaluated by using comb-type pilot scheme. In this paper we proposed a Lattice-type scheme, which efficiently used the pilot allocation The performance is to be measured by MSE and SER. Simulation results shows that that MMSE estimator shown better performance in time domain nature of channel.