A DFT based channel estimation technique in orthogonal-frequency- division-multiplexing (OFDM): A Review
نویسنده
چکیده
Channel estimation is one of the most significant technologies in orthogonal-frequency-divisionmultiplexing(OFDM) . Inter-carrier-interference (ICI) occurs in OFDM which must be removed. There are various methods to reduce ICI in OFDM . Channel estimation techniques are used to investigate to reduce ICI in OFDM .In this paper we will discuss Channel estimation methods and DFT based channel estimation shows better results among other methods. Keywords—Orthogonal frequency division multiplexing (OFDM) Inter carrier interference(ICI), self cancellation (SC),Extended Kalman filtering (EKF) , The least-square (LS) and minimum-mean-square-error (MMSE), Discrete forier Transform( DFT)
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