Performance Analysis of Downlink and Uplink Transmission Schemes in 4G LTE Using Various Modulation Techniques

In the growth of fourth-generation mobile servicing, long` c ns term evolution (LTE) is an emanate technology. In LTE the downlink model build up on orthogonal frequency division multiple access (OFDMA) and the uplink arrangement build up on single carrier frequency division multiple access (SC-FDMA).In this paper we have tendency to derive the achievement of typical elemental differences between the OFDMA and SC-FDMA schemes. In the cutting-edge wireless mobile communications multiple access schema should meet certain requirements like low bit error rate (BER),high signal-to-noise ratio(SNR),high throughput, high spectral efficiency, good channel capacity, low peak to average power ratio(PAPR) and high quality etc. In this paper the act of OFDMA and SC-FDMA in LTE physical layer are reviewed by using various modulation techniques (BPSK, QPSK and 16QAM) with respective to SNR, BER, and PAPR .Finally it summarizes the simulation results of OFDMA and SC-FDMA transmission modes.