Evaluation: OFDMA & SC-OFDMA Performance on Wireless Communication

This paper investigates OFDMA and SC-FDMA techniques combined with the Orthogonal Frequency Division Multiplexing (OFDM). Single carrier frequency Division Multiple Access(SC-FDMA) is a notable application of Multiple Input Multiple Output(MIMO) system. SC-FDMA is one of the most promising techniques aiming at solving the capacity problem of wireless communication systems and achieving higher spectral efficiency, depending on multiplexing signals based on their spatial signature. On the other hand most third generation mobile phone systems are using Code Division Multiple Access (CDMA) as their modulation technique. CDMA is not so complicated to implement as OFDM based systems. As CDMA has a wide bandwidth, it is difficult to equalize the overall