Implementation of Channel Coding in Orthogonal Frequency Division Multiplexing (OFDM) Systems

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Abstract

The role of channel coding in conjunction with frequency and time interleaving is to provide a link between bits transmitted on separated carriers to be reconstructed in the receiver. Orthogonal Frequency Division Multiplexing (OFDM) has been proving throughout the world as a veritable tool in achieving the high data rate necessary for data demanding applications. The structure of OFDM systems makes channel coding more effective in confronting fading channels. In this paper, we analyzed OFDM system and its effects in channel coding. The bit error ratio (BER) performance of the above systems is carried out with emphasis on the modulation scheme and number of carriers. The results show that additional symbols across time frequency increases the rate of transmission and bandwidth without changing the type of modulation employed.

Keywords: Channel Coding, Modulation, Schemes Transmission rate,,

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