An Adaptive LMS Channel Estimation Method for LTE SC-FDMA Systems
نویسندگان
چکیده
3rd generation partnership project (3GPP) long term evolution (LTE) uses single carrier-frequency division multiple access (SC-FDMA) in uplink transmission and orthogonal frequency division multiple access (OFDMA) scheme for the downlink. One of the most important challenges for a transceiver design is channel estimation (CE) and equalization. In this paper, a training based least mean square (LMS) CE method is investigated for a LTE SC-FDMA system. This method can avoid the illconditioned least square (LS) problem. In addition, this CE method uses adaptive estimator which is able to update parameters of the estimator continuously. Simulation results show that the LMS CE technique with 500 Hz Doppler frequency has around 3 dB better performances compared with 1.5k Hz Doppler frequency. Index Term— Channel estimation, least square, LMS, SCFDMA.
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