Title: ADAPTIVE CHANNEL EQUALIZATION FOR FBMC BASED ON VARIABLE LENGTH STEP SIZE AND MEAN-SQUARED ERROR
| Issue Number: | Vol. 3, No. 4 |
| Year of Publication: | 2013 |
| Page Numbers: | 400-410 |
| Authors: | Mashhoor AlTarayrah, Qasem Abu Al-Haija |
| Journal Name: | International Journal of Digital Information and Wireless Communications (IJDIWC) - Hong Kong |
Abstract:
Recently, increasing data transmission rates and the demand of more bandwidth at the same time have been a challenge. The trend now is to support high data rates in wireless communications. Multicarrier systems have overcome many challenges of high bandwidth efficiency and at the same time provided also high spectral efficiency. Filter bank multicarrier systems (FBMC) provide some advantages more than the traditional orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP). FBMC systems provide a much better spectral shaping of the subcarriers than orthogonal frequency division multiplexing (OFDM). Therefore, the most obvious difference between the two techniques is in frequency selectivity. In this paper, we will present a least-mean-square (LMS) algorithm which is based on well-known cost functions, which is the mean-squared error (MSE) adapted for FBMC system with offset QAM modulation (OQAM). This leads to a per-subchannel adaptive equalizer solution with low complexity. The proposed simulations have used practical channel information based on the International Telecommunications Union (ITU) Standards. Moreover, we will discuss how the proposed algorithm will optimize and evaluate the convergence characteristic curves of LMS equalization algorithm per-subcarrier.