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Concatenation of coded OFDM communications system over AWGN and rayleigh fading channels
Tekanyi, Abdoulie Momodou Sunkary1, Ogwu, Jacob2, Okorie, Patrick Ubeh3.
The high bit error rate of the wireless communications system requires Forward Error Correction (FEC) methods to be implemented on the data to be transmitted. Orthogonal Frequency Division Multiplexing (OFDM) technique exhibits some challenges which are Inter Carrier Interference (ICI), high Peak to Average Power Ratio (PAPR), and inadequate spectral efficiency at higher subcarrier channels. Many researchers have attempted to mitigate these mentioned challenges by using different error coding techniques but there is still room for further improvement. Therefore, this paper evaluated the performance of convolutional, Reed-Solomon, and Concatenated Convolutional with Reed-Solomon (CC-RS) coding schemes over AWGN and Rayleigh fading channels in order to improve the spectral efficiency at higher subcarriers. These schemes were implemented in MATLAB R2015b environment and simulation results were validated by comparing these coding techniques with the non-coded OFDM scheme using Bit Error Rate (BER) and Signal to Interference Ratio (SIR) as performance metrics.
Affiliation:
- Ahmadu Bello University, Nigeria
- Ahmadu Bello University, Nigeria
- Ahmadu Bello University, Nigeria
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