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Table 1 The running time of three schemes (unit, second)

From: Secure beamforming design for the UAV-enabled transmission over NOMA networks

K

3

4

5

6

7

8

Optimal

7.6973

8.0412

8.4395

8.7480

9.0384

9.6459

ZF

0.3100

0.3195

0.3280

0.3367

0.3386

0.3810

MRT

0.0310

0.0076

0.0101

0.0120

0.0871

0.0901