A NOVEL STUDY ON UPLINK AND DOWNLINK TRANSCEIVERS FOR LTE SYSTEM

Abstract: LTE (Long Term Evolution) or the E-UTRAN (Evolved Universal Terrestrial Access Network), introduced in 3GPP R8, is the access part of the Evolved Packet System (EPS). The main requirements for the new access network are high spectral efficiency, high peak data rates, short round trip time as well as flexibility in frequency and bandwidth. The new access solution, LTE, is based on OFDMA (Orthogonal Frequency Division Multiple Access) and in combination with higher order modulation (up to 64QAM). OFDM is a multicarrier technology subdividing the available bandwidth into a multitude of mutual orthogonal narrowband subcarriers. In OFDMA these subcarriers can be shared between multiple users. The OFDMA solution leads to high Peak-to-Average Power Ratio (PAPR) requiring expensive power amplifiers with high requirements on linearity, increasing the power consumption for the sender. This is a main problem in OFDMA Hence a different solution was selected for the UL i.e. SC-FDMA. SC-FDMA solution generates a signal with a low PAPR and avoiding packet loss by using interleaving. The main objective of this paper is to design uplink and downlink transceivers with low PAPR and higher capacity to transmit the data over a long distance. Analytic filtering is used here to overcome the value of PAPR. All the programming is done in the MATLAB.

Keywords: 3GPP, LTE, Interleaving SC-FDMA, PAPR.