Design of OFDM on digital signal processors

In this work, Orthogonal Frequency Division Multiplexing (OFDM) is implemented on TMS320C6713 Digital Signal Processors (DSP) Starter Kit (DSK). Transmitter, receiver and communication channel are all implemented on a same kit. Firstly the design is tested within Matlab Simulink environment, and then by configuring C6713 DSK parameters, Simulink blocks relating to C6713 DSK are added into the design. The machine codes generated by compiling the design are loaded to the DSP kit. In this study, firstly OFDM signals with Quadrature Phase Shift Keying (QPSK) modulation is simulated over Additive White Gaussian Nosie (AWGN) and Rayleigh fading channel. In various Signal to Noise Ratio (SNR) values, the bit error rate (BER) values are obtained via simulation. Secondly, OFDM signals Binary Phase Shift Keying (BPSK) modulation is simulated over AWGN and Rayleigh fading channel. In various SNR values, the signal constellations of input and output bits are presented. The BER values are also calculated via simulation. Then, the theoretical and simulation results are depicted. Finally, the BPSK-OFDM design over AWGN channel is compiled by conducting necessary changes on the Simulink project and then the generated machine codes are loaded in to the C6713 DSK. In the real time application, voice music sampled at 128kb/s rate with 16 bit per symbol is used as an input voice signal to the C6713 DSK kit.