STBC-OFDM SYSTEM BASED ON DISCRETE FRAMELET TRANSFORM

This article proposed anew Space Time Block Coded Orthogonal Frequency-Division Multiplexing (STBCOFDM) system based on Discrete Framelet transform (FT) instead of Fast Fourier Transform (FFT) under different channel environments. The proposed system (STBC-FT-OFDM) has been compared with traditional (STBC-FFT-OFDM) system and (STBC-OFDM) based on Discrete Wavelet Transform (STBCDWT- OFDM) system. Through calculating the Bit Error Rate (BER) performance, it proved that the performance of the proposed system is outperform compared with the performance of the other two systems. BER performance of the system is analyzed by employing various digital modulations technique (BPSK, QPSK) over an Additive White Gaussian Noise (AWGN), flat fading, and multipath selective fading channels.