WITHDRAWN: Performance enhancement of MIMO OFDM using FEC codes

Abstract

In wireless communication, the transmitted messages are added with noise. The presence of noise and signal fading develop error messages in the channels. To overcome this problem one has to use forward error-correcting codes (FEC). FEC codes add the redundant bits at the transmitter side such that it can detect the error and correct error present in the channel medium. In this paper, we applied two codes; they are convolution codes and Turbo codes. In this paper, we use the MIMO-OFDM system that is the concatenation of both the “Multiple Input Multiple Output” (MIMO) systems and the Orthogonal Frequency Division Multiplexing (OFDM) system. To reduce interference and Increase the data rate OFDM system is used. To improve the performance of the OFDM system we use multiple antennas at a transmitter and a receiver side (MIMO) for reliable transmission. The forward error correction plays an important role in enhancing the performance of the MIMO-OFDM systems. The performance of a MIMO-OFDM system with the Convolutional and Turbo codes is evaluated based on Bit Error Rate (BER). In this paper Binary Phase Shift Keying (BPSK) modulation is applied and transmitted over Rayleigh channel. BER performance is obtained using MATLAB 19b. By comparing both coding techniques, it is determined that the Turbo code outperforms Convolutional code.