Performance Analysis of 4G Systems with Channel Coding Algorithms

Author Name(s): C. Padmaja, B.L. Malleswari
Author Email: padmaja.chennapragada@gmail.com

Abstract

The performance of wireless communication system is degraded by the burst errors due to deep fades under multipath environment. So, techniques like forward error correction algorithms or automatic repeat request (ARQ) or a combination of both (hybrid ARQ) eliminates the bit error rate (BER). The paper focuses on the performance comparison analysis of different error control codes that gives the near Shannon capacity.

Introduction

The wireless channel is often affected by atmospheric conditions such as scattering and reflections from surroundings. These multiple signals with different amplitudes and phases reaches the receiver, thus causes either constructive or destructive fading [1].

Conclusions

Implementation using turbo coded MIMO-STBC-OFDM system results in better reliability for high speed data transmission over multipath Rayleigh fading channels as compared to uncoded and Convolutional coded MIMO-STBC-OFDM. Also, convolutional decoding using Viterbi algorithm works by rejecting least likely paths at early stages of decoding process yields loss of information. The turbo decoding relies on passing bit by bit soft information about individual transmitted bits from one decoding stage to the next. Further improvement in the performance can be obtained by applying turbo code which gives better performance at low SNR.

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