Performance analysis of OFDMA, MIMO and SC-FDMA technology in 4G LTE networks

Long Term Evolution (LTE) has become a powerful technology for 4th Generation networks. New generation always demand a better quality of service mainly in terms of high data rate, better signal quality, large coverage area and services at low cost etc. LTE comes to support the 4G environment by adopting the three important multiple access techniques. The three multiple access techniques are Orthogonal Frequency Division Multiple Access (OFDMA), Multiple Inputs Multiple Outputs (MIMO) and Single Carrier Frequency Division Multiple Access (SC-FDMA) techniques. Each technique has its associated features that make LTE popular among its users. OFDMA and MIMO technology are used for downlink and SC-FDMA for uplink channel. In this paper, we are going to analyze the performance of OFDMA, MIMO and SC-FDMA in LTE at physical layer by considering different modulation schemes such as BPSK, QPSK, 16 QAM by using BER and SNR as parameters.