Table 4 PSNR values of the received image with RSA encryption, using QPSK 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 | 28.5463 | 28.5315 | 36.7599 | 35.3140 | 28.5684 | 28.5238 |
5 | 29.5041 | 29.3628 | 41.1994 | 39.9556 | 29.4919 | 29.2868 |
10 | 33.0412 | 34.0016 | 47.2747 | 46.4506 | 33.4979 | 33.8547 |
15 | 39.5823 | 43.3186 | 55.2249 | 54.9373 | 41.4343 | 43.6113 |
20 | 46.9117 | 54.1237 | 69.2199 | 62.2302 | 51.2502 | 56.1445 |
25 | 56.6558 | 63.1993 | Inf. | Inf. | 67.3193 | 65.8034 |
30 | Inf. | 72.2302 | Inf. | Inf. | Inf. | Inf. |
35 | Inf. | Inf. | Inf. | Inf. | Inf. | Inf. |