Enhancement of image transmission using chaotic interleaving with discrete wavelet transform-based single-carrier frequency division multiple access system

Long-term evolution (LTE) system adopts single-carrier frequency division multiple access (SC-FDMA) technique for high data-rate uplink wireless communication mainly due to its advantage of high power efficiency and low peak-to-average-power ratio (PAPR). This paper presents a chaotic interleaving scheme for the discrete wavelet transform-based SC-FDMA (DWT SC-FDMA) system to improve the transmission quality of images. This interleaving process is- based on applying the chaotic Baker map to the image before transmission. The proposed scheme combines the advantages of excellent orthogonality and spectral containment from DWT SC-FDMA and performances enhancement from chaotic interleaving. The performances evaluation of the DWT-SC-FDMA system with the chaotic interleaving scheme for efficient image transmission is studied and compared with two schemes of SC-FDMA-based systems: discrete Fourier transform SC-FDMA (DFT SC-FDMA) and discrete cosine transform SC-FDMA (DCT SC-FDMA) over different wireless channel and subcarriers mapping modes. This comparison aims to select the most suitable structure of SC-FDMA for the efficient transmission of the images. The obtained results demonstrate the efficiency of the proposed scheme, which gives an improvement of peak signal-to-noise ratio (PSNR) of about 36 dB (at SNR = 8 dB) is the case of SUI-3 channel and a significant enhancement in bit-error-ratio (BER) performance.