Performance Analysis of 3GPP LTE

Abstract

To meet the increasing demands on the mobile radio systems and data traffic, a successor of UMTS, which runs on an evolution of the existing infrastructure used by over 80 percent of mobile subscribers globally, has been worked on by 3GPP, called Long Term Evolution (LTE). This will permit more powerful and better spectral efficiency of the transmission. The major parts of LTE are Single Carrier Frequency Division Multiple Access (SC-FDMA) & Orthogonal Division Multiple Access (OFDMA). OFDMA is used in the LTE downlink as a multiple access method as it provides good bandwidth efficiency, immunity to multi-path and frequency selective fading, and less complex equalization at the receiver. SC-FDMA is introduced recently and it became handy candidate for uplink multiple access scheme in LTE system as it has the advantage of lower PAPR as compared to that of OFDMA. In our thesis, we analysed the performance of SCFDMA and OFDMA of LTE using different modulation schemes (BPSK, QPSK, 16PSK and 64PSK) on the basis of BER by simulating the model of SCFDMA & OFDMA in MATLAB. We used Additive White Gaussian Noise (AWGN) channel and introduced frequency flat fading in the channel by using Rayleigh Fading model to evaluate the performance in presence of noise and fading. We also found PAPR for both the accessing methods using the same model developed for BPSK modulation.