Performance Assessment of OFDM System using Reed-Solomon Codes over Fading Channels
Abstract
This paper study the performance of Orthogonal Frequency Division Multiplexing (OFDM) system over AWGN and Rayleigh fading channels. OFDM performs multi-carrier transmission where all the subcarriers are orthogonal to each other. The channel coding was applied to improve the OFDM system performance. Reed Solomon (RS) codes was chosen that an efficient channel coding algorithm and has intense error correction ability. Adding the benefits of multicarrier OFDM system and Reed Solomon codes to achieve the expected system performance. The coded OFDM system was modeled over and simulated using Matlab. The bit error rate (BER) and energy bit (Eb) per noise power density (No) was performed during system simulations. QPSK modulation was used to modulate the random bits. From the simulation results It can be seen that BER vs. EB/No parameter for Coded OFDM system lower than uncoded OFDM. This was because RS codes succeed to correcting the error generated along data transmission.
Downloads
References
[2] I. G. Reed and G. Solomon, "Polynomial codes over certain finite fields," J. Soc.Ind. Appl. Maths., pp. 8:300-304, June 1960.
[3] T. K. Moon, Error Correction Coding: Mathematical Methods and Algorithms. John Wiley & Sons, July 2005.
[4] S. Lin and D. J. Costello, Error Control Coding, 2nd ed. Prentice Hall, June 2005.
[5] Masakawa, T., & Ochiai, H. Design of Reed-Solomon Codes for OFDM Systems with Clipping and Filtering. 2007 IEEE Wireless Communications and Networking Conference.
[6] Arijon, I. M. Performance of an OFDM system in frequency selective channels using Reed-Solomon coding schemes. IEE Colloquium on Multipath Countermeasures, 1996.
[7] Van Meerbergen, G., Moonen, M., & De Man, H. (n.d.). Combining Reed-Solomon Codes and OFDM for Impulse Noise Mitigation: RSOFDM. IEEE International Conference on Acoustics Speed and Signal, 2006.
[8] S. B. Weinstein, P. M. Ebert, “Data Transmission by Frequency Division Multiplexing using the Discrete Fourier Transform”, IEEE Transactions on Communications, Volume 19, No. 5, pp. 628 –634, October 1971.
[9] N.M.A.E.D. Wirastuti, J.M. Noras, S.M.R. Jones, Evaluation of the Very Fast Fourier Transform applied to OFDM, Proceeding of 2nd IEE/EURASIP Conference on DSPenabledRadio, London, UK, 19-20 Sept. 2005, p. 12, ISBN: 0 86341 560 1.
