Volume 10 Issue 2 - April 2018

  • 1. A robust and efficient channel estimation scheme for ofdm systems in frequency selective fading channels

    Authors : Gadda Archana Devi, Moparthy Gurunadha Babu

    Pages : 126-132

    DOI : http://dx.doi.org/10.21172/1.102.20

    Keywords : Orthogonal frequency division multiplexingChannel EstimationFrequency Selective Fading ChannelsCo-channel Interference (CCI)Maximum Likelihood Estimator (MLE)Mean Square Error (MSE).

    Abstract :

    Due to the requirement of high speed data transmission, orthogonal frequency division multiplexing (OFDM) is becoming a vital in wireless communication systems like 3G, 4G and even in 5G networks. OFDM is capable to provide higher mobility, higher throughput, maximum possible efficiency versus multipath fading and has a capability of ultra-rate transmission. Nevertheless, these systems should be capable to acquire perfect channel estimation for enabling and permitting of higher mobility practicability for symbol recovery in ultra-speed while handling the co-channel interference (CCI). To address this issue, we introduced a robust and efficient model for channel estimation (CE) for OFDM systems under frequency selective (FS) fading channels. Optimal preface based maximum likelihood (OP-ML) scheme is utilized for estimating the channel perfectly. Simulation results show that for a suf´Čüciently long preface, the ML estimator performs as good as the situation when the channel is known perfectly at the receiver when compared to the conventional CE algorithms with respect to mean square error (MSE). Our proposed system model well suited for digital video broadcasting and optical communications applications.

    Citing this Journal Article :

    Gadda Archana Devi, Moparthy Gurunadha Babu, "A robust and efficient channel estimation scheme for ofdm systems in frequency selective fading channels", https://www.ijltet.org/journal_details.php?id=930&j_id=4480, Volume 10 Issue 2 - April 2018, 126-132, #ijltetorg