A smart channel estimation approach for LTE systems using PSO algorithm

Document Type : Original Article


1 PhD Research Scholar at Amity University Jaipur & Faculty at Kalsekar Technical Campus of Mumbai University

2 Faculty at Dept of Computer Science at Amity School of Engineering & Technology at Amity University


This study focuses on developing an effective channel estimation approach using swarm Intelligence. The Orthogonal Frequency Division Multiplexing ( OFDM) is a modulation technique used to counter transmission channel frequency selection to reach high data rate without disruption. The theory of OFDM is to gain prominence in the field of wireless communication. OFDM is combined with the transmitter and receiver antenna to amplify the variety gain and improve system capacity on selective time and frequency channels, resulting in a Multiple Input Multiple Output ( MIMO) pattern. The most commonly used channel estimation techniques are the Least Square (LS) approaches and Minimum Mean Square Error (MMSE) approaches. In LS, the estimation1process is simple but the problem is that the square error has a high mean. The MMSE is better in Low SNR than in LS, but its main problem is its high computational complexity. A unique method is proposed in this research study that combines LS and MMSE to overcome the aforementioned problems. Upgraded PSO is introduced in this study to select the best channel. This proposed approach is also more efficient and requires less time compared to other techniques to estimate the best channel.


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