Table 3 PSNR values of the received image without 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 | 28.2436 | 28.0397 | 37.9934 | 36.4980 | 28.2485 | 28.0811 |
5 | 29.9629 | 29.4644 | 42.8349 | 41.6171 | 29.7510 | 29.3816 |
10 | 34.2435 | 35.0581 | 49.8215 | 48.3898 | 34.5646 | 34.9748 |
15 | 41.2586 | 44.4995 | 57.7447 | 56.8434 | 42.7363 | 45.2745 |
20 | 48.9089 | 54.3937 | Inf. | Inf. | 51.8449 | 57.7453 |
25 | 61.3029 | 64.5376 | Inf. | Inf. | Inf. | Inf. |
30 | Inf. | Inf. | Inf. | Inf. | Inf. | Inf. |
35 | Inf. | Inf. | Inf. | Inf. | Inf. | Inf. |