Research Article
Secure Downlink Transmission in Cell-Free Massive MIMO System Enhanced by Intelligent Reflecting Surfaces
Algorithm 1
Proposed joint precoding algorithm.
| | Input: All channels , , , and ; Given , . | | | Output: Optimized active precoding beamforming parameters ; | | | Optimized passive precoding beamforming parameters and . | | (1) | Initialize and ; | | (2) | while no convergence of do; | | (3) | Convert according to formulation (27); | | (4) | Update according to (20); | | (5) | Update according to (33); | | (6) | Update by solving (37); | | (7) | Update according to (43); | | (8) | Update by solving (52); | | (9) | end while | | (10) | return , and . |
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