Zhi-Heng Yu

Hierarchical Codebook-Based Analog Beamforming Design for SIM-Assisted Communication Systems

Stacked intelligent metasurface (SIM) can perform signal processing in the wave domain by intelligently optimizing the phase shifts of transmissive meta-elements on each layer. However, it typically requires high overhead to acquire channel state information. In this letter, we propose a hierarchical codebook design fo...