H-DQPSK
From The RadioReference Wiki
H-DQPSK (Harmonized Differential Quadrature Phase Shift Keying) is used in the base station fixed-site equipment for P25 Phase II, and requires linear transmit amplifiers.
H-DQPSK (Harmonized Differential Quadrature Phase Shift Keying) is used in the base station fixed-site equipment for P25 Phase II, and requires linear transmit amplifiers.