New and Efficient DWT SC-FDMA System for Image Transmission
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| Author | Safey A. S. Abdelwahab |
| ISSN | 2306-708X |
| On Pages | 9-14 |
| Volume No. | 2 |
| Issue No. | 2 |
| Issue Date | ------- |
| Publishing Date | ------ |
| Keywords | Wireless Communication, Communications, Digital Signal Processing, Digital Image Processing. |
Abstract
The demand for high speed and efficient wireless communication systems for image transmission has grown due to increasing demands of wireless multimedia applications such as remote sensing via satellite, nuclear medicine, telemedicine, teleconferencing, broadcast television and accessing Internet services on mobile phones with a high-bit-rate transmission and better quality of the offered services. This paper proposes a new efficient single carrier frequency division multiple access (SC-FDMA) system which is currently adopted as the uplink multiple access scheme in 3GPP LTE because it has many advantages over OFDMA. The proposed system uses Discrete Wavelet Transform (DWT) which is widely used to transform an image from the spatial domain to frequency domain to overcome the high implementation complexity drawback of SC-FDMA due to the Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) operations. Simulation of the proposed system is done using Matlab software and measurement of the reconstructed images quality is done using the Peak Signal to Noise Ratio (PSNR) at the receiver. The simulation results show that the proposed DWT based SC-FDMA system provides a better PSNR performance than the DFT SC-FDMA and the DCT SC-FDMA systems.
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