Table 6 PSNR values of the received image with 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 | 28.5279 | 28.5483 | 28.6475 | 28.6184 | 28.4977 | 28.4929 |
5 | 28.5138 | 28.4685 | 28.8915 | 28.7422 | 28.5107 | 28.4756 |
10 | 29.0148 | 28.7591 | 30.7821 | 30.9158 | 28.8321 | 28.7049 |
15 | 31.4021 | 31.7790 | 35.7290 | 38.1194 | 30.6131 | 30.9957 |
20 | 36.3356 | 39.7319 | 42.9669 | 48.1801 | 35.6885 | 38.2799 |
25 | 43.1750 | 49.6354 | 53.7800 | 55.8987 | 42.8036 | 48.0213 |
30 | 51.6638 | 58.9412 | 65.8777 | 64.1737 | 53.1565 | 59.7577 |
35 | 61.0908 | Inf. | Inf. | Inf. | 60.2136 | Inf. |