US 12,250,013 B2
System and method for digital predistortion
Mir Adeel Masood, Mesa, AZ (US); Stephane Kerrurien, May sur Orne (FR); and Peter Zahariev Rashev, Calgary (CA)
Assigned to NXP USA, Inc., Austin, TX (US)
Filed by NXP USA, Inc., Austin, TX (US)
Filed on Sep. 27, 2023, as Appl. No. 18/475,399.
Claims priority of application No. 22306969 (EP), filed on Dec. 21, 2022.
Prior Publication US 2024/0214014 A1, Jun. 27, 2024
Int. Cl. H04B 1/04 (2006.01)
CPC H04B 1/0475 (2013.01) [H04B 2001/0425 (2013.01); H04B 2001/045 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A digital front-end circuit for use in performing radio frequency (RF) transmission, the digital front-end circuit comprising:
a digital predistortion (DPD) block having a first input terminal and a first output terminal;
a power amplifier (PA) having a second input terminal and a second output terminal; and
a transmitter coupling the first output terminal of the DPD block at least indirectly with the second input terminal of the PA,
wherein the DPD block is configured to receive a first input signal and to provide a first output signal having first and second components at the first output terminal,
wherein the DPD block includes a main distortion kernel that is configured to generate the first component of the first output signal based at least indirectly upon the first input signal by performing first processing equaling or substantially corresponding to each of at least one static polynomial (SP) calculation, and at least one first memory polynomial (MP) calculation, and
wherein the DPD block additionally includes a nonlinear memory kernel that is configured to generate the second component of the first output signal based at least indirectly upon the first input signal by performing second processing at least partly corresponding to each of at least one second MP calculation of a first order, and at least one cross-term memory polynomial (CP) calculation of a first order, and
wherein the nonlinear memory kernel is configured to perform the second processing at least in part by a first nonlinear envelope modulator including a first linear finite impulse response (FIR) filter.