This abstract provides a technical review of Orthogonal Frequency Division Multiple Access (OFDMA) and Single Carrier Frequency Division Multiple Access (SC-FDMA) schemes within Long-Term Evolution (LTE) operations. It examines their respective advantages, limitations, and implementations in LTE systems. OFDMA allows multiple users to access the same frequency resources simultaneously by assigning orthogonal subcarriers, enhancing spectral efficiency and accommodating varying data rates. SC-FDMA, employed in the uplink transmission of LTE, reduces peak-to-average power ratio (PAPR) and enhances power efficiency while maintaining compatibility with OFDMA principles. The abstract discusses the intricacies of both schemes, including their modulation techniques, resource allocation methods, and their impact on system performance metrics. By understanding the nuances of OFDMA and SC-FDMA, this review has provided insights into their roles and applications in LTE networks, and has shown that the choice of which multiple access technique to use largely depends on the specific requirements of a wireless system.