A General Order Reduction Method of Wideband Digital Predistortion Model Using Attention Mechanism

Table 2

Comparison of linearization effects under different nonlinear conditions.

	PA nonlinearity			PA nonlinearity and / imbalance
	Num. of real basis function terms	NMSE (dB)	ACPR (±25 MHz) (dBc)	Num. Of real basis function terms	NMSE (dB)	ACPR (±25 MHz) (dBc)
No DPD	\	-8.68	-31.14/-33.24	\	-7.51	-29.75/-31.52
GMP (complex model)	262	-32.67	-44.63/-44.99	262	-22.75	-38.02/-39.94
OMP (complex model)	28	-32.30	-44.34/-44.95	8	-22.47	-38.14/-39.81
DOMP (complex model)	24	-32.30	-44.57/-44.87	6	-22.40	-38.07/-39.91
GMP (real model)	262	-37.67	-45.65/-46.97	262	-34.47	-41.29/-42.77
OMP (real model)	166	-37.28	-45.66/-46.74	188	-34.09	-41.20/-42.69
DOMP (real model)	84	-37.29	-45.53/-46.84	74	-34.09	-41.18/-42.75
Proposed pruning model	56	-37.28	-45.64/-46.81	54	-34.07	-41.21/-42.72