TY - JOUR
T1 - Movable-Element RIS-Aided Wireless Communications
T2 - An Element-Wise Position Optimization Approach
AU - Zhao, Jingjing
AU - Huang, Qingyi
AU - Cai, Kaiquan
AU - Zhou, Quan
AU - Mu, Xidong
AU - Liu, Yuanwei
N1 - Publisher Copyright:
© 1997-2012 IEEE.
PY - 2026
Y1 - 2026
N2 - A point-to-point movable element (ME) enabled reconfigurable intelligent surface (ME-RIS) communication system is investigated, where each element position can be flexibly adjusted to create favorable channel conditions. For maximizing the communication rate, an efficient ME position optimization approach is proposed. Specifically, by characterizing the cascaded channel power gain in an element-wise manner, the position of each ME is iteratively updated by invoking the successive convex approximation method. Numerical results unveil that: 1) proposed element-wise ME position optimization algorithm outperforms the standard gradient ascent algorithm (GAA) which is easily trapped in local optima and 2) ME-RIS significantly improves the communication rate compared to the conventional RIS with fixed-position elements.
AB - A point-to-point movable element (ME) enabled reconfigurable intelligent surface (ME-RIS) communication system is investigated, where each element position can be flexibly adjusted to create favorable channel conditions. For maximizing the communication rate, an efficient ME position optimization approach is proposed. Specifically, by characterizing the cascaded channel power gain in an element-wise manner, the position of each ME is iteratively updated by invoking the successive convex approximation method. Numerical results unveil that: 1) proposed element-wise ME position optimization algorithm outperforms the standard gradient ascent algorithm (GAA) which is easily trapped in local optima and 2) ME-RIS significantly improves the communication rate compared to the conventional RIS with fixed-position elements.
KW - Reconfigurable intelligent surface (RIS)
KW - movable element (ME)
KW - position optimization
UR - https://www.scopus.com/pages/publications/105028242567
U2 - 10.1109/LCOMM.2026.3655084
DO - 10.1109/LCOMM.2026.3655084
M3 - 文章
AN - SCOPUS:105028242567
SN - 1089-7798
VL - 30
SP - 967
EP - 971
JO - IEEE Communications Letters
JF - IEEE Communications Letters
ER -