US 12,436,219 B2
Reconfigurable intelligent surface beamforming
Mohammad Khojastepour, Lawrenceville, NJ (US); and Nariman Torkzaban, College Park, MD (US)
Assigned to NEC Corporation, Tokyo (JP)
Filed by NEC Laboratories America, Inc., Princeton, NJ (US)
Filed on Sep. 20, 2022, as Appl. No. 17/948,751.
Claims priority of provisional application 63/246,899, filed on Sep. 22, 2021.
Prior Publication US 2023/0086903 A1, Mar. 23, 2023
Int. Cl. G01S 3/14 (2006.01); H04B 7/06 (2006.01); G01S 7/02 (2006.01)
CPC G01S 3/14 (2013.01) [H04B 7/0617 (2013.01); G01S 7/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for configuring a surface, comprising:
measuring properties of one or more incident signals at a configurable cell of a surface that includes configurable cells in an array of height v and width h;
determining a beam forming pattern for the surface based on the measured properties of the one or more incident signals;
determining a gain parameter for the configurable cell as:

OG Complex Work Unit Math
where mv, mh designates a location of the configurable cell in the array, CD,mv,mh designates a beamforming vector of the configurable cell, and c is a beamforming vector of the surface;
determining a phase shift parameter for the configurable cell as:

OG Complex Work Unit Math
where ∠CD,mv,mh is an angle of the beamforming vector of the configurable cell; and
setting the gain parameter and the phase shift parameter of the configurable cell to implement the beam forming pattern in the surface.