Non Binary SC-FDMA for 3GPP LTE uplink

Abstract

Single Carrier Frequency Division Multiple Access (SC-FDMA) is a multiple access scheme that uses DFT spreading prior to OFDM modulation to map the signal from each user to a subset of the available subcarriers. That has similar performance and almost the same overall structure as those of an OFDMA system. Its advantage over OFDMA is that the SC-FDMA signal has lower peak-to-average power ratio (PAPR). SC-FDMA has drawn great attention as an attractive alternative to OFDMA, especially in the uplink communications where lower PAPR greatly benefits the mobile terminal in terms of transmitted power efficiency. In this paper, we have given the proposal of Non Binary SC-FDMA, replacing binary number by octal number system. The most prominent result that we have obtained using non-binary SC-FDMA, compared to binary case is further reduction of BER and peak power of SC-FDMA signals which have been shown by mathematical analysis, and are simulated for different channels using Interleaved FDMA (IFDMA), and localized FDMA (LFDMA).