Optimization Design of Beamforming, Phase Shifts, and Power Allocation for RIS-Assisted AF Relay Network. - Jiayao Zhang; Caixia Cai; Han Hai; Anwer Al-Dulaimi; Poongundran Selvaprabhu; Sunil Chinnadurai; Shahid Mumtaz (IEEE Wirel. Commun. Lett., 2026)