C3. Image Transmission with DCT Based SC-FDMA System Using Continuous Phase Modulation

This paper studies the performance of Discrete Cosine Transform based Single Carrier Frequency Division Multiple Access (DCT-SC-FDMA) with image transmission. Also, we propose a Continuous Phase Modulation (CPM) based DCT-SC-FDMA structure for efficient image transmission. The proposed structure combines the advantages of excellent spectral energy compaction property of DCT based SC-FDMA, in addition to exploiting the channel frequency diversity and the power efficiency of CPM. Two types of transforms are considered and compared for performance evaluation of CPM based SC-FDMA; Discrete Fourier Transform (DFT) and DCT. Moreover, the performance of the proposed CPM based DCT-SC-FDMA structure is compared with the conventional QPSK based SC-FDMA system. Simulation experiments are performed using Additive White Gaussian Noise (AWGN) channel. Simulation results show that the CPM based DCT-SC-FDMA structure increases the transmission efficiency and provides better performance and achieves higher Peak Signal to Noise Ratio (PSNR) values in the received images when compared to conventional QPSK based SC-FDMA system.