Article Published In Vol.2 (May-June-2014)

Performance Evaluation of LMS and VSS-LMS Channel Estimation Techniques for LTE Uplink under Different Doppler Shifts

Author : Mohammed H. M. Nerm and Nidaa M. H. Elshaikh

In 3GPP LTE, OFDMA is used as a multiple access technique in downlink while SC-FDMA is used in uplink since it has low PAPR compared with ODFMA and that will lead to saving power of transmitter (MS). In this paper SC-FDMA is modeled and LMS and VSS-LMS channel estimation techniques is applied to the model in order to estimate the channel response. The performance is analyzed under different channel environments by calculating BER and MSE for both algorithms. The results show that the performance of both algorithms degrades under high Doppler shifts however VSS-LMS has better performance compared with LMS.

Keywords: BER, LMS, MSE, ODFMA, PAPR, SC-FDMA, VSS-LMS.