Table 5 PSNR values of the received image without RSA encryption, using 16-QAM modulation and different subcarriers mapping methods
From: Secure image transmission through LTE wireless communications systems
SNR [dB] | DFT-OFDMA | DCT-OFDMA | DST-OFDMA | |||
|---|---|---|---|---|---|---|
DFT-LOFDMA | DFT-IOFDMA | DCT-LOFDMA | DCT-IOFDMA | DST-LOFDMA | DST-IOFDMA | |
0 | 28.2883 | 28.2349 | 29.4765 | 29.1328 | 28.2367 | 28.2575 |
5 | 28.3601 | 28.1634 | 30.2378 | 29.4022 | 28.3004 | 28.1114 |
10 | 29.4397 | 29.0117 | 32.2950 | 32.1861 | 29.2597 | 28.8732 |
15 | 32.2672 | 32.8441 | 37.4806 | 39.6453 | 31.6865 | 32.0007 |
20 | 37.4269 | 41.1872 | 46.0558 | 49.4004 | 37.2600 | 39.3936 |
25 | 43.7650 | 51.4515 | 58.1279 | Inf. | 44.9389 | 49.2409 |
30 | 51.9278 | Inf. | Inf. | Inf. | 56.1740 | 61.2700 |
35 | Inf. | Inf. | Inf. | Inf. | Inf. | Inf. |