Abstract

SC-FDMA (Single Carrier Frequency Division Multiple Access) is the Uplink Multiple Access scheme for the standard LTE (Long Term Evolution). In this paper a baseband simulation system model is proposed for analyzing the BLER (block error rate) performance of various algorithms in LTE uplink. The BLER performance of the proposed system is studied under five different channels (AWGN, Pedestrian A channel, Pedestrian B channel, Vehicular A channel and Vehicular B channel)including two level CRC (Cyclic Redundancy Check) encoding, modified Turbo encoding based on QPP (Quadratic Polynomial Permutation) internal interleaving, Turbo decoding and rate matching models. Simulation results show that under four different channels, the BLER of LTE system is effectively reduced by using two level CRC encoding, improved internal interleaver Turbo encoding and the LogMapMaxLogMap Turbo decoding used. Compared to the MaxLogMap Turbo decoding method, with the increasing of the SNR, the LogMap Turbo decoding has better BLER performance, but the decoding complexity increases as well.

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