An Implementation of Error Minimization Data Transmission in OFDM using Modified Convolutional Code

Hendy Briantoro, I Gede Puja Astawa, Amang Sudarsono


This paper presents about error minimization in OFDM system. In conventional system, usually using channel coding such as BCH Code or Convolutional Code. But, performance BCH Code or Convolutional Code is not good in implementation of OFDM System. Error bits of OFDM system without channel coding is 5.77%. Then, we used convolutional code with code rate 1/2, it can reduce error bitsonly up to 3.85%. So, we proposed OFDM system with Modified Convolutional Code. In this implementation, we used Software Define Radio (SDR), namely Universal Software Radio Peripheral (USRP) NI 2920 as the transmitter and receiver. The result of OFDM system using Modified Convolutional Code with code rate is able recover all character received so can decrease until 0% error bit. Increasing performance of Modified Convolutional Code is about 1 dB in BER of 10-4 from BCH Code and Convolutional Code. So, performance of Modified Convolutional better than BCH Code or Convolutional Code.

Keywords: OFDM, BCH Code, Convolutional Code, Modified Convolutional Code, SDR, USRP

Full Text:



Gordon L., Stüber, John R. Barry, Steve W. Mclaughlin, Ye(Geoffrey) Li, MaryAnn Ingram, and Thomas G. Pratt, Broadband MIMO-OFDM Wireless Communication, Proceedings of the IEEE, Vol.92 ,No.2, February, 2004

Tiago Pereira, Manuel Violas, João Lourenço, Atílio Gameiro, and Adão Silva, An FPGA Implementation of OFDM Transceiver for LTE Applications, International Journal on Advances in Systems and Measurements,Vol 6 - No 1 & 2, 2013

Zainudin, Ahmad, Amang Sudarsono, I Gede Puja Astawa, Reliability Analysis of Digital Communication for Various Data Types Transmision Using GNU Radio and USRP, Industrial Electronic Seminar, 2013

Henry Hendrix, Viterbi Decoding Techniques for the TMS320C55x DSP Generation, April, 2009

National Instrument, An Introduction to Software Define Radio With LabVIEW Communications System Design Software and NI USRP, USA, 2015

Abirami M, Gandhiraj R, Soman K P, Performance Analysis of Real Time OFDM Based Communication System Using GNU Radio and USRP, International Journal of Advanced Research in Computer Science and Software Engineering, Volume 3, Issue 6, June 2013, ISSN: 2277 128X

Khan, Irfan Y., Sunil U. Nyati, and Umesh S. Bhadade, To Improve Performance of OFDM System Using Optimize Adaptive Coding Technique with Convolutional and BCH Coding, International Journal of Application or Innovation in Engineering & Management (IJAIEM)Vol 3 – Issue 5, 2014

Kafaltiya, Anjali, and P. S. Sharma, Performance Improvement in MIMO-OFDM using BCH Coding and Interleaving, International Journal of Computer Applications Vol 97 – No 2, 2014.

Yong Soo Cho, Jaekwon Kim, Won Young Yang, Chung-Gu Kang, MIMOOFDM Wireless Communications With MATLAB, Wiley, IEEE Press, 2010.

Ho Shan-Yuan, Daniel J. Kleitman, An Odd Kind of BCH Code, Elsevier, 2012

DOI: 10.24003/emitter.v3i2.44


  • There are currently no refbacks.

Copyright (c) 2016 EMITTER International Journal of Engineering Technology

EMITTER Journal Editorial Office


Politeknik Elektronika Negeri Surabaya

Jl. Raya ITS - Kampus PENS Sukolilo Surabaya 60111, INDONESIA   Telp : +62 31 594 7280   Fax : +62 31 594 6114