US 12,308,870 B2
ACLR adjustable electronic device and operation method therefor
Kyungwoo Yoo, Suwon-si (KR); Hyung Sun Lim, Suwon-si (KR); Hongmin Choi, Suwon-si (KR); and Joonhoi Hur, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Jul. 5, 2023, as Appl. No. 18/218,367.
Claims priority of application No. 10-2022-0113068 (KR), filed on Sep. 6, 2022.
Prior Publication US 2024/0080052 A1, Mar. 7, 2024
Int. Cl. H04B 1/04 (2006.01)
CPC H04B 1/0475 (2013.01) [H04B 2001/0425 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An electronic device comprising:
a predistorter circuit configured to predistort an input signal based on a predistortion coefficient to generate a predistortion signal;
a power amplifier configured to amplify the predistortion signal to generate an output signal;
an error correction circuit configured to update the predistortion coefficient to minimize a Normalized Mean Square Error (NMSE) between the input signal and the output signal; and
an Adjacent Channel Leakage Ratio (ACLR) adjustment circuit configured to operate based on a determination that the NMSE is minimized to:
calculate an ACLR from the output signal of the power amplifier, and
update the predistortion coefficient to minimize a cost function based on the ACLR,
wherein the cost function is defined as follows:
C=γ(ACLRL+ACLRH)+(1−γ)|ACLRL−ACLRH|,0≤γ≤1
wherein, C is the cost function, γ is a weight of the cost function, ACLRL is a low ACLR corresponding to a low-band adjacent channel based on a target channel of the output signal and ACLRH is a high ACLR corresponding to a high-band adjacent channel based on the target channel of the output signal.