Publication

Abstract : In this paper, the need of LDPC encoding scheme in LTE/LTE-A system is analyzed in terms of BER performance. It is shown that the target BER of 10-4 can be achieved at relatively lower SNRs. The link performance of the LDPC encoded uplink and downlink is analyzed for AWGN, Rayleigh and Ped A channels. The OFDMA multiple access technique is used in downlink and SC-FDMA is used in the uplink of the fourth generation 4G wireless communication systems LTE/LTE-A. The simulation results show the considerable improvement in BER performance for multipath fading channel with LDPC encoding scheme in the transceivers. For both Uplink and Downlink transceivers the improvement in BER performance is compared for different scenarios and it is shown that 10-4 can be achieved at SNR 14 dB (approx.).