US 12,231,122 B2
Device and method for applying a look-up table
Jurgen Stauder, Montreuil/Ille (FR); Angelo Mazzante, Melesse (FR); Marie-Jean Colaitis, Cesson-sévigné (FR); and Patrick Morvan, Laille (FR)
Assigned to InterDigital CE Patent Holdings, SAS, Paris (FR)
Appl. No. 18/025,078
Filed by InterDigital CE Patent Holdings, SAS, Paris (FR)
PCT Filed Sep. 6, 2021, PCT No. PCT/EP2021/074435
§ 371(c)(1), (2) Date Mar. 7, 2023,
PCT Pub. No. WO2022/053417, PCT Pub. Date Mar. 17, 2022.
Claims priority of application No. 20305994 (EP), filed on Sep. 8, 2020.
Prior Publication US 2023/0336178 A1, Oct. 19, 2023
Int. Cl. H03K 19/17728 (2020.01)
CPC H03K 19/17728 (2013.01) 15 Claims
OG exemplary drawing
 
1. A method, performed in a device and comprising:
applying a pre-function w=P(x) to an input signal x to obtain a first result w; and
applying a look up table (LUT) to the first result w, wherein the LUT represents a main function ƒw(w) defined for a second grid of values Gw such that the pre-function P(x) is piecewise defined on a first grid Gx of signal values, where Gw=P(Gx), and
wherein the pre-function P(x) is obtained from a second pre-function Q(x) by applying Q(x) to signal values x to calculate the second grid Gw=Q(Gx) and defining the pre-function P(x) piecewise on the first grid Gx by linear interpolation of the values of the second grid Gw such that P(Gx)=Q(Gx).